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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

City of Gilroy

Arsenic is a potent carcinogen and common contaminant in drinking water. Arsenic causes thousands of cases of cancer each year in the U.S. Click here to read more about arsenic.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND90ND
2013N/A00N/A
2014N/A00N/A
2015ND90ND
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.004 ppb

The EWG Health Guideline of 0.004 ppb for arsenic was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 10 ppb

The legal limit for arsenic, established in 2001, was based on costs for arsenic removal, as calculated at the time that the standard was set. This limit does not fully protect against the risk of cancer due to arsenic exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2012-05-215810-001-0850ND
2012-05-215810-006-1315ND
2012-05-215810-004-1045ND
2012-05-215810-002-1135ND
2012-05-225810-010-1115ND
2012-05-225810-009-1035ND
2012-05-225810-008-0955ND
2012-05-225810-007-0745ND
2012-05-225810-011-0835ND
2015-05-205810-010-0810ND
2015-05-205810-009-1100ND
2015-05-205810-008-1025ND
2015-05-205810-007-1300ND
2015-05-205810-006-0945ND
2015-05-215810-011-0955ND
2015-05-215810-004-1250ND
2015-05-215810-002-1010ND
2015-05-215810-001-0800ND