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EWG's Tap Water Database — 2021 UPDATE

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Arsenic

San Gabriel Valley Water Company - Fontana

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.

MORE ABOUT THIS CONTAMINANT

 

130

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.435 ppb313ND - 5.50 ppb
20150.333 ppb302ND - 6.20 ppb
20160.408 ppb252ND - 6.10 ppb
2017ND220ND
20180.463 ppb192ND - 4.80 ppb
2019ND30ND

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
2014-01-089588-003-1130ND
2014-01-109588-001-1045ND
2014-01-229588-022-1145ND
2014-01-229588-023-1030ND
2014-01-229588-028-1110ND
2014-03-059588-020-1120ND
2014-03-199588-006-09104.10 ppb
2014-03-199588-007-10003.90 ppb
2014-03-269588-011-0900ND
2014-04-169588-043-0850ND
2014-04-169588-044-1100ND
2014-04-169588-045-1010ND
2014-04-169588-064-0920ND
2014-04-179588-014-0835ND
2014-04-179588-031-0745ND
2014-05-219588-063-0725ND
2014-05-279588-016-0925ND
2014-05-279588-040-1245ND
2014-06-109588-037-1000ND
2014-06-109588-038-0850ND
2014-06-249588-033-0800ND
2014-06-249588-042-0830ND
2014-07-099588-065-0850ND
2014-07-099588-067-1100ND
2014-07-099588-068-1000ND
2014-07-239588-026-0740ND
2014-07-239588-034-0945ND
2014-07-239588-072-0910ND
2014-07-249588-041-0800ND
2014-07-319588-024-0740ND
2014-08-069588-027-10205.50 ppb
2015-01-309588-001-0815ND
2015-01-309588-003-0915ND
2015-01-309588-011-1050ND
2015-01-309588-022-0750ND
2015-01-309588-023-0845ND
2015-01-309588-027-10306.20 ppb
2015-02-269588-007-08553.80 ppb
2015-02-269588-020-0820ND
2015-02-269588-028-0745ND
2015-03-129588-031-0800ND
2015-03-129588-044-0900ND
2015-03-129588-045-0740ND
2015-03-239588-043-0810ND
2015-03-239588-064-0750ND
2015-04-279588-026-0840ND
2015-05-119588-038-1015ND
2015-05-119588-040-1045ND
2015-05-139588-016-1130ND
2015-05-139588-033-0945ND
2015-05-139588-037-1205ND
2015-05-139588-042-0900ND
2015-05-189588-024-0800ND
2015-05-189588-065-0900ND
2015-05-189588-068-0945ND
2015-06-109588-067-0730ND
2015-06-159588-034-0800ND
2015-06-159588-041-0715ND
2015-06-159588-072-0740ND
2015-08-199588-014-1030ND
2015-10-269588-063-1000ND
2016-01-259588-001-1030ND
2016-01-259588-003-0910ND
2016-02-179588-007-09254.10 ppb
2016-02-179588-022-0900ND
2016-02-179588-023-0850ND
2016-02-179588-028-0830ND
2016-02-179588-043-1030ND
2016-02-179588-063-1005ND
2016-02-179588-064-1020ND
2016-03-149588-026-1100ND
2016-03-149588-038-0920ND
2016-03-149588-040-0900ND
2016-03-149588-068-0950ND
2016-05-049588-065-0745ND
2016-05-169588-067-1020ND
2016-05-239588-027-09106.10 ppb
2016-06-239588-033-0950ND
2016-06-239588-042-1010ND
2016-06-309588-024-0740ND
2016-06-309588-034-0820ND
2016-06-309588-041-0720ND
2016-06-309588-072-0810ND
2016-07-119588-016-1030ND
2016-07-119588-037-1000ND
2016-11-299588-035-0930ND
2017-02-019588-001-0935ND
2017-02-019588-003-0810ND
2017-02-079588-028-0930ND
2017-02-239588-020-1030ND
2017-02-239588-022-1040ND
2017-02-239588-023-1020ND
2017-02-249588-026-0830ND
2017-02-249588-043-0920ND
2017-02-249588-063-0930ND
2017-02-249588-064-0910ND
2017-05-089588-011-1105ND
2017-05-099588-024-1005ND
2017-05-099588-041-0925ND
2017-06-139588-033-1000ND
2017-06-139588-042-0945ND
2017-06-199588-034-0910ND
2017-06-199588-072-0850ND
2017-07-269588-038-0830ND
2017-08-079588-067-1100ND
2017-09-149588-031-1320ND
2017-09-149588-044-1420ND
2017-09-149588-045-1340ND
2018-01-199588-076-0800ND
2018-03-129588-023-0940ND
2018-03-159588-006-11104.80 ppb
2018-03-159588-007-08104.00 ppb
2018-03-159588-020-0730ND
2018-03-269588-043-0950ND
2018-04-099588-040-1030ND
2018-05-219588-063-0840ND
2018-06-119588-034-1030ND
2018-06-119588-037-1130ND
2018-06-119588-068-0947ND
2018-06-119588-072-1020ND
2018-06-259588-065-0900ND
2018-07-059588-028-0750ND
2018-07-099588-033-1140ND
2018-07-179588-042-0954ND
2018-07-179588-067-1030ND
2018-07-309588-031-0800ND
2018-07-309588-045-0730ND
2019-01-029588-076-1000ND
2019-06-179588-064-0915ND
2019-07-119588-043-0810ND