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EWG's Tap Water Database — 2019 UPDATE

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Arsenic

California Water Service (CWS) - Salinas

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.

 

107

Samples

1

Samples exceeding legal limit (MCL)

83

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20122.70 ppb118ND - 5.20 ppb
20131.76 ppb149ND - 4.50 ppb
20142.63 ppb3331ND - 4.87 ppb
20152.53 ppb1412ND - 5.40 ppb
20161.88 ppb1510ND - 4.50 ppb
20172.63 ppb2013ND - 10.8 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
2012-02-149590-009-1250ND
2012-02-149590-106-13302.90 ppb
2012-03-079590-037-14023.40 ppb
2012-03-089590-041-11465.20 ppb
2012-04-189590-010-1148ND
2012-04-199590-008-10403.40 ppb
2012-06-149590-006-10162.10 ppb
2012-07-249590-104-1438ND
2012-09-209590-005-11393.00 ppb
2012-09-265701-008-14024.83 ppb
2012-12-205701-008-15544.84 ppb
2013-01-179590-017-13502.00 ppb
2013-01-239590-024-12584.50 ppb
2013-01-249590-015-1045ND
2013-01-249590-022-13482.90 ppb
2013-01-249590-043-1448ND
2013-01-299590-018-10042.00 ppb
2013-03-129590-014-13353.90 ppb
2013-03-129590-023-1439ND
2013-05-099590-102-1314ND
2013-05-099590-103-14572.20 ppb
2013-06-139590-020-11352.20 ppb
2013-09-115701-008-13512.86 ppb
2013-11-149590-123-13502.10 ppb
2013-12-269590-131-1159ND
2014-01-159590-019-1331ND
2014-01-165701-805-15013.52 ppb
2014-04-229590-039-11122.40 ppb
2014-06-105701-104-13184.87 ppb
2014-06-165701-131-11401.81 ppb
2014-06-179590-026-12393.20 ppb
2014-07-095701-030-13402.25 ppb
2014-08-085701-027-11501.58 ppb
2014-08-085701-030-13491.88 ppb
2014-08-085701-102-14271.69 ppb
2014-08-085701-103-15132.20 ppb
2014-08-139590-028-13554.10 ppb
2014-08-135701-028-13581.54 ppb
2014-08-135701-028-14141.79 ppb
2014-08-135701-029-10001.69 ppb
2014-08-135701-039-15153.15 ppb
2014-08-145701-041-11254.87 ppb
2014-08-145701-123-09242.06 ppb
2014-08-259590-030-11053.80 ppb
2014-08-269590-029-10253.40 ppb
2014-09-259590-027-0937ND
2014-09-259590-046-13434.10 ppb
2014-10-035701-030-10242.27 ppb
2014-11-055701-006-10302.13 ppb
2014-11-125701-024-12104.66 ppb
2014-11-125701-037-11263.36 ppb
2014-11-125701-102-10171.87 ppb
2014-11-125701-103-09392.39 ppb
2014-11-125701-123-14022.01 ppb
2014-12-215701-005-12302.65 ppb
2014-12-225701-014-13433.63 ppb
2014-12-225701-017-10221.77 ppb
2014-12-225701-046-14064.04 ppb
2015-01-225701-023-11191.85 ppb
2015-01-225701-043-13582.04 ppb
2015-02-189590-009-1400ND
2015-02-189590-106-13152.60 ppb
2015-03-119590-037-11103.70 ppb
2015-03-119590-041-10305.40 ppb
2015-03-115701-131-11551.60 ppb
2015-04-219590-008-14533.40 ppb
2015-05-195701-102-11402.14 ppb
2015-06-039590-006-1010ND
2015-06-165701-104-14135.31 ppb
2015-07-229590-005-15362.80 ppb
2015-07-225701-023-10282.47 ppb
2015-10-205701-023-11212.19 ppb
2016-01-269590-020-13262.50 ppb
2016-01-279590-018-10202.20 ppb
2016-02-039590-022-14103.00 ppb
2016-02-109590-103-13302.50 ppb
2016-02-169590-103-1433ND
2016-02-229590-024-15154.50 ppb
2016-03-039590-015-1433ND
2016-05-035701-026-12492.88 ppb
2016-05-049590-017-14292.00 ppb
2016-05-129590-102-1427ND
2016-06-285701-023-13492.66 ppb
2016-06-289590-023-1358ND
2016-12-289590-027-1513ND
2016-12-289590-123-14422.00 ppb
2016-12-299590-008-14154.00 ppb
2017-01-109590-019-1355ND
2017-01-105701-023-1319ND
2017-02-085701-026-14212.34 ppb
2017-02-279590-027-1516ND
2017-03-029590-132-105010.00 ppb
2017-05-095701-026-13342.38 ppb
2017-06-275701-018-11132.78 ppb
2017-06-275701-029-10252.09 ppb
2017-08-159590-026-14262.10 ppb
2017-08-239590-029-14132.00 ppb
2017-09-199590-046-14233.80 ppb
2017-10-175701-023-1152ND
2017-10-179590-030-1331ND
2017-11-209590-008-13413.70 ppb
2017-11-209590-014-14164.20 ppb
2017-11-219590-104-13524.50 ppb
2017-11-219590-131-1252ND
2017-11-289590-043-1424ND
2017-11-299590-030-14552.00 ppb
2017-12-215701-132-092810.8 ppb