Drinking Water
 ESB has been certified for drinking water testing by the State of California since 1928. Today we offer a full range of inorganic, organic and microbiological testing for potable waters. Many of our drinking water clients include local water purveyors, municipalities, and state and federal agencies.
Bacteriological Testing
ESB provides testing for the coliform group of bacteria, HPC, iron bacteria, streptococci, and yeast and mold. We offer the 24 hour presence/absence Colilert® test method as well as multiple tube fermentation and membrane filtration techniques. Enumeration of coliforms, including E. coli, is also available for the Colilert® procedure. When requested in advance, speciation can be provided for positive samples. Complete bacteriological sampling instructions are available on our sampling instructions page.
California Title 22 Drinking Water Requirements
In addition to bacteriological monitoring, the most common requirements for drinking water supplies are contained in California Title 22. Our laboratories provide testing and reporting for primary, secondary, and unregulated chemicals. We were one of the first laboratories in California to analyze for Perchlorate, which is routinely included in our inorganic analysis packages and can be determined by IC/MS/MS (EPA Method 332.0), if requested.
With our extensive drinking water testing expertise we offer:
- Bacteriological Analyses.
- Inorganic & Mineral Analyses, such as nitrate, cyanide, and alkalinity.
- Trace Metal Analysis, such as arsenic, chromium, mercury, copper and lead.
- Volatile Organic Compounds (VOCs), such as PCE, TCE, and MTBE.
- Semi-Volatile & Synthetic Organic Compounds (SOC), such as DBCP, Atrazine, Endrin, Benzo(a)Pyrene and Endothall.
- Radiological Analyses, such as Gross Alpha, Beta and Radon are offered in conjunction with our laboratory partners.
(A complete list of accredited and certified analyses which also includes sample containers, preservatives and holding times can be found on our Qualifications page.)
For a listing of the established maximum contaminant levels, (MCLs) set by the State of California click here.
ESB conducts drinking water analyses daily and can provide you with hard copy and electronic reporting to the State of California in a timely and reliable fashion.
Stage 2 Disinfection Byproducts & Lead and Copper Rule
Additional laboratory services include monitoring for Total Trihalomethanes (TTHMs) and Haloacetic Acids (HAA5) for compliance with maximum residual disinfectant residuals to meet federal requirements. Bromate and Chlorite, along with bromide, chlorate and other inorganic disinfection byproducts and precursor analyses are also available.
To meet the requirements of the Lead and Copper Rule, ESB’s trace metals section provides ICP/MS EPA 200.8 series analysis of distribution system samples.
UCMR 2 Analyses
Twenty-six unregulated contaminants are currently being monitored by many U.S. drinking water suppliers under the second cycle of the Unregulated Contaminant Monitoring Rule (UCMR 2). This EPA program utilizes five analytical methods to detect the contaminants.
All public water systems serving more than 10,000 people and a sample of 800 systems serving 10,000 people or fewer will monitor those contaminants on the assessment list for 12 months during January 2008 through July 2010 . . . For more information on UCMR 2, visit the EPA Safewater web site at www.epa.gov/safewater/ucmr/ucmr2 or call the Safe Drinking Water Hotline at 800-426-4791.
ESB is EPA-approved for all 5 methods and all 26 unregulated contaminants of concern in the Federal UCMR 2 Assessment and Screening survey.
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