In order to ensure that tap water is safe to drink, the United States Environmental Protection Agency (USEPA) and the California Department of Public Health (DPH) prescribe regulations that limit the amount of certain contaminants in water provided by public water systems. USEPA, DPH and the California Environmental Protection Agency (CalEPA) set goals and legal standards for the quality of drinking water. These standards are intended to protect consumers from contaminants in drinking water. The presence of contaminants does not necessarily indicate that water poses a health risk. More information about contaminants and potential health effects can be obtained by calling the EPA’s Safe Drinking Water Hotline 1-800-426-4791. The following information outlines water contaminants common to the Santa Clarita Valley.
ArsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer.
ArsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. is a naturally occurring substance that is sometimes found at very low levels in drinking water, primarily groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground..
Studies from Taiwan suggest that exposure to drinking water containing more than 100 micrograms per Liter (mg/L) of arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. – more than twice the amount allowed by U.S. law – may be linked to greater incidence of some forms of cancer. While there has been research indicating that low levels of arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. in drinking water poses a risk to human health, scientists agreed that there are significant gaps in the data and that additional research is needed to formulate an appropriate level for a primary drinking water standard(1) A recommended practice in the manufacturing of products or materials or in the conduct of a business, art, or profession. Such standards may or may not be used as (or called) specifications. (2) A document that specifies the minimum acceptable characteristics of a product or material, issued by an organization that develops such documents (e.g., an American Water Works Association standard). (3) A numerical contaminant limit set by a regulatory agency (e.g., a US Environmental Protection Agency maximum contaminant level)..
The EPA is required by the Safe Drinking Water Act Amendments of 1996 to finalize a new drinking water standard(1) A recommended practice in the manufacturing of products or materials or in the conduct of a business, art, or profession. Such standards may or may not be used as (or called) specifications. (2) A document that specifies the minimum acceptable characteristics of a product or material, issued by an organization that develops such documents (e.g., an American Water Works Association standard). (3) A numerical contaminant limit set by a regulatory agency (e.g., a US Environmental Protection Agency maximum contaminant level). for arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. based on good scientific information and data by January 2001. The current maximum contaminant level (MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good.) is 50 mg/L. In May 2000, the EPA proposed an arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. standard(1) A recommended practice in the manufacturing of products or materials or in the conduct of a business, art, or profession. Such standards may or may not be used as (or called) specifications. (2) A document that specifies the minimum acceptable characteristics of a product or material, issued by an organization that develops such documents (e.g., an American Water Works Association standard). (3) A numerical contaminant limit set by a regulatory agency (e.g., a US Environmental Protection Agency maximum contaminant level). of 5 ug/L but is considering standards of 3 mg/L and 10 mg/L as well.
A recent memo from the Office of Congressional and Intergovernmental Relations to the EPA’s ArsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. Work Group published by the national Inside EPA newsletter raises further doubts about the rule. In it, EPA’s governmental affairs office warned that it “would not support a proposal of 5 ug/L, indeed, we have substantial concerns about a proposal of 10 ug/L as well.”
In preparation for the proposed rule, EPA asked the National Academy of Sciences (NAS) to conduct a risk assessment for arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. based on currently available science. The NAS report was released in late March 1999, and doesn’t recommend an arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. standard(1) A recommended practice in the manufacturing of products or materials or in the conduct of a business, art, or profession. Such standards may or may not be used as (or called) specifications. (2) A document that specifies the minimum acceptable characteristics of a product or material, issued by an organization that develops such documents (e.g., an American Water Works Association standard). (3) A numerical contaminant limit set by a regulatory agency (e.g., a US Environmental Protection Agency maximum contaminant level).. It does state that the arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. regulation must be strengthened, but calls for more research to support an appropriate standard(1) A recommended practice in the manufacturing of products or materials or in the conduct of a business, art, or profession. Such standards may or may not be used as (or called) specifications. (2) A document that specifies the minimum acceptable characteristics of a product or material, issued by an organization that develops such documents (e.g., an American Water Works Association standard). (3) A numerical contaminant limit set by a regulatory agency (e.g., a US Environmental Protection Agency maximum contaminant level)..
The EPA was supposed to publish a proposed rule to lower the Maximum Contaminant Level (MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good.) of arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. in January 2000. When they did not, the National Resources Defense Council (NRDC) sued the EPA. The NRDC also released a report on its estimate of the risks of arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. in drinking water and contended that the MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good. should be no greater than 3 mg/L.
In this report, the arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. concentrations of many drinking water utilities were published, including those serving the Santa Clarita Valley. The NRDC took data from the EPA database and calculated different estimates of the average amount of arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. in each water system. They calculated a “low” and “best” average based on the most current results. For the water systems in the Santa Clarita Valley, the results were between five and ten years old. The NRDC estimated that none of water served in the Santa Clarita Valley exceeded the current MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good. of 50 mg/L, the expected proposed MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good. of 5 mg/L, or the NRDC’s proposed MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good. of 3 mg/L. Despite this, the NRDC’s estimates are still much higher than the actual levels in the drinking water of the Santa Clarita Valley. There have been no levels reported above 3 mg/L, and the majority of tests show no detectable arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. at all.
For additional information on arsenicA naturally occurring element in the environment. Arsenic in drinking water commonly comes from natural sources in the ground, but some can come from industrial pollution. At high concentrations it can cause cancer. you can contact the EPA at www.epa.gov, the United States Geological Survey at water.usgs.gov, the California Department of Health Services at www.dhs.ca.gov, the California Environmental Protection Agency (Cal/EPA) at www.calepa.ca.gov. Much of the information presented here was provided by the Association of California Water Agencies at www.acwa.com.
MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002.
Over the last several years, Methyl Tertiary Butyl Ether (MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002.) has been making headlines in California. Back in the 1980s, it was hailed as a major break-through in air pollution prevention. By adding it to gasoline, the amount of carbon monoxide released by automobiles could be greatly reduced. The California Air Resources Board (CARB) credits MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. with removing three million pounds of carbon monoxide from our air per year. Both CARB and the EPA required that MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. be added to gasoline.
In 1995 however, it was discovered that MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. had contaminated the groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. in the City of Santa Monica. It had leaked from underground fuel tanks and migrated into the City’s aquiferAn underground geologic formation of rock, soil or sediment that is naturally saturated with water; an aquifer stores groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground... Since then, many wells throughout California have been found to have similar contamination problems. MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. has also been found in a number of lakes in California. In this case, the MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. is not present because of leaking fuel tanks but rather from motorboats that burn gasoline containing MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002.. MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. is foul tasting at even very low concentrations and there are many concerns about long term consumption of drinking water contaminated with MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002.. In response to these problems, California has banned the use of MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. as a fuel additive. However, the EPA continues to require its use so it is still found in California’s gasoline. California has requested a waiver from the EPA, but it has yet to be granted.
All drinking water in the Santa Clarita Valley comes from the approximately 40 local wells and Castaic Lake. The Regional Water Quality Control Board requires that owners of underground storage tanks test the ground for contamination. A few leaking tanks have been found in the Santa Clarita Valley. However, the local wells have been tested every year since 1997 for MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. at the CLWA’s Water Quality Laboratory. No MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. has ever been found in any of the local drinking water wells.
The water in Castaic Lake has been tested by the Department of Water Resources (DWRCalifornia Department of Water Resources. Guides development and management of California's water resources; owns and operates the State Water Project) for possible MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. contamination. MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. and other gasoline components have been found on the surface of the lake, particularly near the boat launches. However, DWRCalifornia Department of Water Resources. Guides development and management of California's water resources; owns and operates the State Water Project has not found MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. in the water leaving the lake. CLWA checks the water entering its two water treatment plants from Castaic Lake as well as the water leaving the plants at least 6 times per year. No MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. has ever been found in Castaic Lake water delivered to the consumers of the Santa Clarita Valley.
For additional information on MTBEMethyl tertiary butyl ether. An oxygenate used in California gasoline to help prevent air pollution. The chemical has a long life and has been determined to have polluted lakes, reservoirsA pond or lake where water is collected and stored until it is needed. and groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. after leaking from watercraft, underground tanks and pipelines. Required to be phased out by Dec. 31, 2002. you can contact the EPA at www.epa.gov, the United States Geological Survey at ca.water.usgs.gov/, the California Department of Health Services at www.dhs.ca.gov, the California Environmental Protection Agency (Cal/EPA) at www.calepa.ca.gov, the State Water Resources Control Board and the Los Angeles Regional Water Quality Control Board at www.swrcbState Water Resources Control Board. Regulates water quality and water rights to protect beneficial water use in the Bay/DeltaFan-shaped area at the mouth of a river. A California example is the Sacramento-San Joaquin Delta east of San Francisco Bay. estuary..ca.gov.
PerchlorateA chemical used in manufacturing rocket fuel that has contaminated some California groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. basins. Perchlorate interferes with iodide uptake into the thyroid gland. The disruption of thyroid functions leads to changes in metabolism in adults and normal growth and development in children.
PerchlorateA chemical used in manufacturing rocket fuel that has contaminated some California groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. basins. Perchlorate interferes with iodide uptake into the thyroid gland. The disruption of thyroid functions leads to changes in metabolism in adults and normal growth and development in children., a chemical used in making rocket and ammunitions propellants, has been a water quality concern in the SCV for the past few years. It was detected in 1997 in four Saugus Formation wells operated by purveyors near the former Whittaker-Bermite facility. These four wells have not been used as sources of supply since 1997. In November 2002, perchlorateA chemical used in manufacturing rocket fuel that has contaminated some California groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. basins. Perchlorate interferes with iodide uptake into the thyroid gland. The disruption of thyroid functions leads to changes in metabolism in adults and normal growth and development in children. was detected in an Alluvial well adjacent to the Whittaker site, and it was immediately closed.
In 2002, CLWA and the U.S. Army Corps of Engineers signed a cost-sharing agreement for a feasibility study of the area. All proceedings and data are available to the public through a California Department of Toxic Substances Control (DTSC) information repository as well as public meetings. A notification level of 6 ug/L was determined in early 2004. DPH has adopted 6 ug/L as an MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good. for perchlorateA chemical used in manufacturing rocket fuel that has contaminated some California groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. basins. Perchlorate interferes with iodide uptake into the thyroid gland. The disruption of thyroid functions leads to changes in metabolism in adults and normal growth and development in children. since that time.
The purveyors and the DTSC signed an oversight agreement in 2003 regarding studies of treatment technologies for removing perchlorateA chemical used in manufacturing rocket fuel that has contaminated some California groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. basins. Perchlorate interferes with iodide uptake into the thyroid gland. The disruption of thyroid functions leads to changes in metabolism in adults and normal growth and development in children. from water supplies, and have also been working with DPH to obtain the necessary permits for these treatment processes. Treatment method pilot studies were conducted during 2003, and in 2004 CLWA and the purveyors selected ion exchange as the preferred treatment method for removing perchlorateA chemical used in manufacturing rocket fuel that has contaminated some California groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. basins. Perchlorate interferes with iodide uptake into the thyroid gland. The disruption of thyroid functions leads to changes in metabolism in adults and normal growth and development in children.. Design of the CLWA treatment facilities and related pipelines was complete in 2007. Construction of the treatment facility and pipelines began in November 2007 and water will begin being treated in early 2009.
Under federal and state law, the owners of the Whittaker-Bermite property have the responsibility for the groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. cleanup. A final settlement to remediate and treat the contaminated water was completed and executed by the parties in April 2007.
NDMA
Another chemical making news lately is N-nitrosodimethylamine (NDMA). This chemical has been found on many of the same sites as perchlorateA chemical used in manufacturing rocket fuel that has contaminated some California groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. basins. Perchlorate interferes with iodide uptake into the thyroid gland. The disruption of thyroid functions leads to changes in metabolism in adults and normal growth and development in children.. Some NDMA has been found locally on the same Bermite site where perchlorateA chemical used in manufacturing rocket fuel that has contaminated some California groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. basins. Perchlorate interferes with iodide uptake into the thyroid gland. The disruption of thyroid functions leads to changes in metabolism in adults and normal growth and development in children. has been detected. However, in sharp contrast to perchlorateA chemical used in manufacturing rocket fuel that has contaminated some California groundwaterWater that has percolated into natural, underground aquifers; water in the ground, not a puddle of water on the ground. basins. Perchlorate interferes with iodide uptake into the thyroid gland. The disruption of thyroid functions leads to changes in metabolism in adults and normal growth and development in children., NDMA has been found in very small quantities and has not been detected in any well water.
The EPA has classified NDMA as a probable carcinogen. However, EPA has not yet established a regulation or “Maximum Contaminant Level (MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good.)” for NDMA. This is because NDMA is just now being detected and understood, and only a very small amount of information on NDMA exists – there is not enough information yet for EPA to set an appropriate MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good..
The California Department of Health Services (DHS) has established an interim “Action Level” level of 20 ng/L (nanograms per liter or parts per trillion). This is an extremely low level. In fact, if you were to fill the Rose Bowl in Pasadena all the way to the top row of seats with water, two drops of that water would be about the same as 20 ng/L. DHS put this very low level in place to provide public health protection while we wait for doctors and scientists to determine what a safe level of NDMA might be.
It may be possible that NDMA is formed as a by-product produced during disinfection of water or treating wastewaterWater that has waste material in it. with chlorine. Such disinfection is critical to the safety of drinking water, as it kills the bacteriaPlural of bacteriumA microscopic unicellular organism that lacks a nuclear membrane. Some can cause disease.., viruses and other microorganisms that cause such waterborne diseases as typhoid, polio and dysentery-diseases that kill more than 10,000 children each day around the world.
At the present time, there are very few laboratories that can detect NDMA at these low levels, and there is no laboratory method that has been approved by EPA or DHS. CLWA and several other water agencies are working with DHS to try out new NDMA testing methods, and to determine if NDMA is present in local drinking water supplies.
In December 1999, the DHS laboratory detected 7 ng/L in the Rio Vista Treatment Plant effluent. However, at the same time Montgomery Laboratories in Pasadena did not detect any NDMA in the same sample. Montgomery Laboratories did detect 2 ng/L of NDMA in the effluent of the Earl Schmidt FiltrationPassing water through coal, sand and gravel to remove particles.
Floc – Clumps of impurities removed from water during the purification process; formed when alum is added to impure water. Plant. DHS did not analyze that sample. DHS and Montgomery Laboratories tested five more samples from various sites in the Santa Clarita Valley. No NDMA was detected in any of the other samples.
Additional information on NDMA can be found at the EPA and DHS web sites, www.epa.gov, and www.dhs.ca.gov. Check our web site in the future for any new information we receive regarding the health studies on NDMA and the results of NDMA testing in your drinking water.
ChromiumA naturally occurring element found in air, soil, water and food.
Testing Results for ChromiumA naturally occurring element found in air, soil, water and food.
Neither Castaic Lake nor any of the Santa Clarita Valley’s wells have had any chromiumA naturally occurring element found in air, soil, water and food. detected in concentrations greater than 0.01 mg/L.
ChromiumA naturally occurring element found in air, soil, water and food. Fact Sheet (Courtesy of ACWA)
ChromiumA naturally occurring element found in air, soil, water and food. is an inorganicPertaining to material such as sand, salt, iron, calcium salts, and other mineral materials. Inorganic substances are of mineral origin, whereas organic substances are usually of animal or plant origin and contain carbon. chemical that is used in electroplating, leather tanning, wood treatment, pigments manufacture and cooling tower treatment for corrosion control. ChromiumA naturally occurring element found in air, soil, water and food. can enter drinking water sources through discharges from industries, leaching from hazardous waste sites, and erosion of natural deposits.
There are two forms of chromiumA naturally occurring element found in air, soil, water and food. species that may be present in drinking water: chromiumA naturally occurring element found in air, soil, water and food. III and chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water.. There are uncertainties in the balance of occurrence of the two species in drinking water sources. ChromiumA naturally occurring element found in air, soil, water and food. III is an essential nutrient at trace concentrations. ChromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water. is the primary species of health concern and its toxicity is the basis for setting the chromiumA naturally occurring element found in air, soil, water and food. drinking water standard(1) A recommended practice in the manufacturing of products or materials or in the conduct of a business, art, or profession. Such standards may or may not be used as (or called) specifications. (2) A document that specifies the minimum acceptable characteristics of a product or material, issued by an organization that develops such documents (e.g., an American Water Works Association standard). (3) A numerical contaminant limit set by a regulatory agency (e.g., a US Environmental Protection Agency maximum contaminant level).. There is evidence that chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water. may be reduced to chromiumA naturally occurring element found in air, soil, water and food. III in the human body, particularly in the reducing environment of saliva and gastric juices.
The EPA has classified chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water. as a human carcinogen by inhalation. In 1991, EPA reviewed the existing chromiumA naturally occurring element found in air, soil, water and food. standard(1) A recommended practice in the manufacturing of products or materials or in the conduct of a business, art, or profession. Such standards may or may not be used as (or called) specifications. (2) A document that specifies the minimum acceptable characteristics of a product or material, issued by an organization that develops such documents (e.g., an American Water Works Association standard). (3) A numerical contaminant limit set by a regulatory agency (e.g., a US Environmental Protection Agency maximum contaminant level)., and raised the Maximum Contaminant Level (MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good.) from 0.05 mg/L (1975 Interim Drinking Water Standard(1) A recommended practice in the manufacturing of products or materials or in the conduct of a business, art, or profession. Such standards may or may not be used as (or called) specifications. (2) A document that specifies the minimum acceptable characteristics of a product or material, issued by an organization that develops such documents (e.g., an American Water Works Association standard). (3) A numerical contaminant limit set by a regulatory agency (e.g., a US Environmental Protection Agency maximum contaminant level).) to 0.1 mg/L as total chromiumA naturally occurring element found in air, soil, water and food., based on its decision that chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water. was not carcinogenic by ingestion.
The California Department of Health Services (CDHS) reviewed the chromiumA naturally occurring element found in air, soil, water and food. risk assessment data in 1994, and maintained the State chromiumA naturally occurring element found in air, soil, water and food. MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good. of 0.05 mg/L. In its 1999 risk assessment, the California EPA, Office of Environmental Health Hazard Assessment (OEHHA) disagreed with EPA’s conclusion on the carcinogenicity of chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water.. OEHHA determined that a health protective level against carcinogenicity for chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water. was 0.2 ug/L(ppb), and set the Public Health Goal (PHG) for total chromiumA naturally occurring element found in air, soil, water and food. at 2.5 ug/L. The PHG was calculated assuming that total chromiumA naturally occurring element found in air, soil, water and food. in water is made up of no more than 7.1 percent chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water.. (Note: More recent analyses suggest the proportion of hexavalent chromiumA naturally occurring element found in air, soil, water and food. to total chromiumA naturally occurring element found in air, soil, water and food. may be much higher.)
The California chromiumA naturally occurring element found in air, soil, water and food. MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good. is currently under review. CDHS has indicated that it must have more occurrence data before considering revising the total chromiumA naturally occurring element found in air, soil, water and food. MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good., or adopting an MCLMaximum Contaminant Level. According to health agencies, the maximum amount of a substance that can be present in water that’s safe to drink and which looks, tastes and smells good. for chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water.. CDHS plans to add chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water. to the list of unregulated chemicals for which monitoring is required when the Department amends the existing unregulated chemical monitoring regulation to be effective in 2001.
Because chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water. is not a regulated contaminant, there are no officially approved analytical methods for compliance purposes. The EPA Method 7199 (and other equivalent methods) uses Ion Chromatography followed by post-column derivatization. The Method Detection Limits are typically between 0.2 to 0.3 ug/L. One commercial laboratory in southern California has so far been identified as capable of measuring chromiumA naturally occurring element found in air, soil, water and food. VIAKA “chrome 6.” One of the most common species of chromiumA naturally occurring element found in air, soil, water and food.. Exposure to airborne chromiumA naturally occurring element found in air, soil, water and food. VI compounds in industrial settings is known to cause cancer. The evidence of its carcinogenicity by ingestion is not compelling. The U.S. Environmental Protection Agency determined that chromiumA naturally occurring element found in air, soil, water and food. VI was not carcinogenic by ingestion of food or drinking water. at concentrations below 0.2 ug/L.
More information on chromiumA naturally occurring element found in air, soil, water and food. can be obtained from OEHHA and DHS.
