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Drinking Water Testing Services

Category Press Release
Publish Date 2/24/2022
Author Paul Cochrane
Title New Study Examines Common Contaminants from Domestic Water Wells in California
Introduction LA Testing offers laboratory services, sampling supplies and easy-to-use test kits to identify a wide range of chemical and microbial contaminants from water samples.

Huntington Beach, CA, February 24th, 2022

A study by scientists from UC Berkley and UCLA was recently published in the American Journal of Public Health that examined domestic water wells in California for three common contaminants. According to the researchers, an estimated 370,000 California residents that are dependent on domestic wells for their drinking water are possibly being exposed to high levels of nitrate, arsenic, or hexavalent chromium.

In California, nitrate is principally a by-product of nitrogen use in fertilizer for agricultural purposes. Its presence in groundwater can also come from septic systems, confined animal feeding operations and from treated wastewater according to the California Water Boards.

The Centers for Disease Control and Prevention (CDC) states that arsenic can enter the water supply from natural deposits in the earth or from industrial and agricultural pollution. It is widely believed that naturally occurring arsenic dissolves out of certain rock formations when ground water levels drop significantly.

The California Water Boards reports that much of the low level hexavalent chromium found in drinking water is naturally occurring, reflecting its presence in geological formations throughout the state. However, there are areas of contamination in California from historic industrial use, such as the manufacturing of textile dyes, wood preservation, leather tanning, and anticorrosion coatings, where hexavalent chromium contaminated waste has migrated into the underlying groundwater.

“This study only looked at a few of the many potential contaminants people in California should be aware of,” said Michael Chapman, Laboratory Manager of LA Testing’s Huntington Beach facility. “Many of the people dependent on domestic wells live in rural and agricultural parts of the state. Exposure to any of the three contaminants can cause a variety of health concerns. Fortunately, California residents can turn to LA Testing for a wide range of chemical and microbial testing services. With multiple laboratories, we also provide sampling supplies and even offer easy-to-use test kits.”

To learn more about water testing or other environmental, health and safety services, please visit, email or call (800) 755-1794. For access to test kits, visit

About LA Testing

LA Testing is California’s leading laboratory for indoor air quality testing of asbestos, mold, lead, VOCs, formaldehyde, soot, char, ash, and smoke damage, particulates, and other chemicals.  In addition, LA Testing offers a full range of air sampling and investigative equipment to professionals and the public. LA Testing maintains an extensive list of accreditations including: AIHA-LAP, LLC (AIHA-LAP, LLC EMLAP, AIHA-LAP, LLC IHLAP, AIHA-LAP, LLC ELLAP), CDC ELITE, NVLAP, State of California, State of Hawaii Department of Health, and other states.  LA Testing, along with the EMSL Analytical, Inc. network, has multiple laboratories throughout California including South Pasadena, Huntington Beach, San Leandro, San Diego, and Ontario.

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