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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

Moore

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.

 

118

Samples

5

Samples exceeding legal limit (MCL)

14

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.960 ppb252ND - 19.0 ppb
20130.227 ppb221ND - 5.00 ppb
2014ND210ND
20152.88 ppb255ND - 34.0 ppb
20160.667 ppb152ND - 5.00 ppb
20174.52 ppb104ND - 16.3 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
2012-03-212C22047-01ND
2012-03-212C22047-02ND
2012-03-212C22047-0319.0 ppb
2012-03-212C22047-04ND
2012-03-212C22047-05ND
2012-03-212C22047-06ND
2012-06-192F19086-01ND
2012-06-192F19086-02ND
2012-06-192F19086-03ND
2012-06-192F19086-04ND
2012-06-192F19086-05ND
2012-06-282F28082-01ND
2012-09-192I20076-01ND
2012-09-192I20076-02ND
2012-09-192I20076-03ND
2012-09-192I20076-04ND
2012-09-192I20076-05ND
2012-09-192I20076-06ND
2012-11-202K20070-01ND
2012-11-202K20070-025.00 ppb
2012-11-202K20070-03ND
2012-11-202K20070-04ND
2012-11-202K20070-05ND
2012-11-202K20070-06ND
2012-11-202K20071-01ND
2013-03-113C13003-01ND
2013-03-113C13003-02ND
2013-06-253F25067-015.00 ppb
2013-06-253F25067-02ND
2013-06-253F25067-03ND
2013-06-253F25067-04ND
2013-06-253F25067-05ND
2013-09-283I30025-02ND
2013-09-283I30025-03ND
2013-09-283I30025-04ND
2013-11-253K26108-01ND
2013-11-253K26108-03ND
2013-12-173L17097-01ND
2013-12-173L17097-02ND
2013-12-173L17097-03ND
2013-12-173L17097-04ND
2013-12-173L17097-05ND
2013-12-173L17097-07ND
2013-12-173L17097-08ND
2013-12-173L17097-09ND
2013-12-173L17097-10ND
2013-12-173L17097-13ND
2014-03-134C14011-05ND
2014-03-134C14011-06ND
2014-03-134C14011-07ND
2014-03-134C14011-08ND
2014-05-294E30010-07ND
2014-05-294E30010-08ND
2014-08-114H12133-01ND
2014-08-114H12133-02ND
2014-08-114H12133-04ND
2014-08-114H12133-06ND
2014-08-124H12133-07ND
2014-08-124H12133-08ND
2014-08-184H19104-05ND
2014-10-094J10006-01ND
2014-10-094J10006-02ND
2014-10-094J10006-05ND
2014-10-094J10006-07ND
2014-10-094J10006-08ND
2014-11-184K21010-01ND
2014-11-184K21010-02ND
2014-12-044L05007-03ND
2015-03-105C10136-01ND
2015-03-105C10136-02ND
2015-03-105C10136-03ND
2015-03-105C10136-04ND
2015-03-105C10136-05ND
2015-06-245F26009-03ND
2015-06-245F26009-05ND
2015-06-245F26009-06ND
2015-06-245F26009-07ND
2015-08-175H18116-05ND
2015-08-175H18116-06ND
2015-12-085L08161-01ND
2015-12-085L08161-02ND
2015-12-085L08161-03ND
2015-12-085L08161-04ND
2015-12-085L08161-059.00 ppb
2015-12-085L08161-06ND
2015-12-085L08161-079.00 ppb
2015-12-085L08161-1034.0 ppb
2015-12-225L22085-01ND
2015-12-225L22085-02ND
2015-12-225L22085-03ND
2015-12-225L22085-049.00 ppb
2015-12-225L22085-0511.0 ppb
2015-12-225L22085-06ND
2016-02-226B23061-025.00 ppb
2016-02-226B23061-03ND
2016-02-226B23061-055.00 ppb
2016-02-236B23061-01ND
2016-02-236B23061-04ND
2016-04-286D29012-04ND
2016-04-286D29012-05ND
2016-04-286D29012-06ND
2016-04-286D29012-07ND
2016-04-286D29012-08ND
2016-08-186H19025-01ND
2016-08-186H19025-02ND
2016-08-186H19025-03ND
2016-12-286L29051-03ND
2016-12-286L29051-08ND
2017-03-237C24009-07ND
2017-05-157E16017-05ND
2017-08-247H25008-056.90 ppb
2017-10-037J03118-01ND
2017-10-037J03118-048.70 ppb
2017-10-037J03118-0516.3 ppb
2017-10-037J03118-08ND
2017-10-317K01144-0513.3 ppb
2017-10-317K01144-07ND
2017-12-147L15016-01ND