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EWG's Tap Water Database — 2019 UPDATE

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Chromium (total)

Golden State Water Company (GSWC) - San Dimas

Chromium is a naturally occurring metal, but industrial uses can elevate its levels in water. One form, hexavalent chromium, causes cancer. Total chromium is not a good indicator of the amount of hexavalent chromium in drinking water.

 

42

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND30ND
2014N/A00N/A
20150.286 ppb3726ND - 0.900 ppb
2016N/A00N/A
2017ND10ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 100 ppb

The legal limit for total chromium, established in 1991, was based on a 1958 toxicity study in laboratory animals, and applies to both the less-toxic trivalent chromium and the more-toxic hexavalent chromium forms of this compound. This limit does not protect against the risk of cancer from ingestion of hexavalent chromium.

ppb = parts per billion

All test results

Date Lab ID Result
2012-08-159588-014-0945ND
2013-03-112706-039-1403ND
2013-04-092706-039-1312ND
2013-11-149588-051-0920ND
2015-01-215A21031-05A0.370 ppb
2015-01-215A21031-03A0.370 ppb
2015-01-215A21031-13A0.260 ppb
2015-01-215A21031-15A0.440 ppb
2015-01-215A21031-17A0.440 ppb
2015-01-215A21031-19A0.350 ppb
2015-01-215A21031-01AND
2015-01-215A21031-21A0.370 ppb
2015-01-215A21031-09A0.350 ppb
2015-01-215A21031-07AND
2015-01-215A21031-11A0.490 ppb
2015-04-175D17033-05AND
2015-04-175D17033-03A0.900 ppb
2015-04-175D17033-09A0.320 ppb
2015-04-175D17033-07A0.790 ppb
2015-04-175D17033-01AND
2015-04-175D17033-11A0.360 ppb
2015-04-175D17033-13A0.590 ppb
2015-07-215G21057-03A0.430 ppb
2015-07-215G21057-01AND
2015-07-215G21057-05A0.420 ppb
2015-07-215G21057-07AND
2015-07-215G21057-15A0.210 ppb
2015-07-215G21057-21A0.230 ppb
2015-07-215G21057-17A0.400 ppb
2015-07-215G21057-19A0.240 ppb
2015-07-215G21057-13A0.260 ppb
2015-07-215G21057-09A0.480 ppb
2015-07-215G21057-11A0.580 ppb
2015-09-119588-014-0905ND
2015-10-205J21034-11AND
2015-10-205J21034-07AND
2015-10-205J21034-09A0.310 ppb
2015-10-205J21034-13AND
2015-10-205J21034-05A0.200 ppb
2015-10-205J21034-03A0.430 ppb
2015-10-205J21034-01AND
2017-01-059588-051-0800ND