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EWG's Tap Water Database — 2019 UPDATE

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Chromium (hexavalent)

Golden State Water Company (GSWC) - San Dimas

Chromium (hexavalent) is a carcinogen that commonly contaminates American drinking water. Chromium (hexavalent) in drinking water may be due to industrial pollution or natural occurrences in mineral deposits and groundwater. Read more about chromium (hexavalent).

 

50

Samples

0

Samples exceeding legal limit (MCL)

40

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.340 ppb51ND - 1.70 ppb
2015ND3936ND - 2.10 ppb
20161.18 ppb53ND - 2.30 ppb
2017ND10ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.02 ppb

The EWG Health Guideline of 0.02 ppb for chromium (hexavalent) 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.

ppb = parts per billion

All test results

Date Lab ID Result
2014-11-049588-051-0910ND
2014-11-049588-017-1005ND
2014-11-049588-014-0920ND
2014-11-049588-013-0900ND
2014-11-049588-004-08501.70 ppb
2015-01-215A21031-11A0.590 ppb
2015-01-215A21031-07A0.0340 ppb
2015-01-215A21031-09A0.380 ppb
2015-01-215A21031-01A0.110 ppb
2015-01-215A21031-21A0.330 ppb
2015-01-215A21031-03A0.460 ppb
2015-01-215A21031-15A0.370 ppb
2015-01-215A21031-19A0.300 ppb
2015-01-215A21031-05A0.510 ppb
2015-01-215A21031-17A0.360 ppb
2015-01-215A21031-13A0.330 ppb
2015-04-175D17033-05A0.0700 ppb
2015-04-175D17033-09A0.210 ppb
2015-04-175D17033-07A0.710 ppb
2015-04-175D17033-11A0.240 ppb
2015-04-175D17033-03A0.760 ppb
2015-04-175D17033-01A0.0500 ppb
2015-04-175D17033-13A0.470 ppb
2015-06-01ND*
2015-07-012706-005-13102.10 ppb
2015-07-215G21057-21A0.180 ppb
2015-07-215G21057-15A0.200 ppb
2015-07-215G21057-17A0.400 ppb
2015-07-215G21057-13A0.240 ppb
2015-07-215G21057-05A0.520 ppb
2015-07-215G21057-19A0.220 ppb
2015-07-215G21057-01A0.0340 ppb
2015-07-215G21057-03A0.450 ppb
2015-07-215G21057-09A0.500 ppb
2015-07-215G21057-11A0.650 ppb
2015-07-215G21057-07A0.0350 ppb
2015-09-119588-014-0905ND
2015-10-205J21034-01AND
2015-10-205J21034-13A0.0710 ppb
2015-10-205J21034-07A0.1000 ppb
2015-10-205J21034-11A0.0340 ppb
2015-10-205J21034-05A0.140 ppb
2015-10-205J21034-09A0.250 ppb
2015-10-205J21034-03A0.280 ppb
2016-03-039588-017-0815ND
2016-05-129588-003-09101.80 ppb
2016-05-129588-004-11001.80 ppb
2016-05-199588-005-10552.30 ppb
2016-09-149588-013-0900ND
2017-01-059588-051-0800ND

* Sample result is taken from the system's CCR report.