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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

South Coast Water District - Capistrano Beach

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.

 

28

Samples

1

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND20ND
2013ND20ND
2014ND20ND
2015N/A00N/A
2016N/A00N/A
20171.23 ppb221ND - 27.0 ppb

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
2012-08-291805-010-1045ND
2012-08-291805-007-1047ND
2013-10-021805-010-1522ND
2013-10-021805-007-1524ND
2014-09-021805-010-1422ND
2014-09-021805-007-1426ND
2017-08-081805-007-1139ND
2017-08-081805-010-113627.0 ppb
2017-08-281805-007-1406ND
2017-08-281805-010-1404ND
2017-09-051805-007-1132ND
2017-09-051805-010-1130ND
2017-09-111805-007-1138ND
2017-09-111805-010-1136ND
2017-10-181805-010-1207ND
2017-10-181805-007-1209ND
2017-10-231805-010-1605ND
2017-10-231805-007-1607ND
2017-10-301805-010-1406ND
2017-10-301805-007-1408ND
2017-11-071805-010-1121ND
2017-11-071805-007-1123ND
2017-11-131805-010-1549ND
2017-11-131805-007-1551ND
2017-11-201805-010-1403ND
2017-11-201805-007-1405ND
2017-11-281805-010-1112ND
2017-11-281805-007-1114ND