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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

California Water Service - Bear Gulch

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.

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41

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND100ND
2014ND30ND
2015ND30ND
2016ND80ND
2017ND100ND
2018ND30ND
2019ND40ND

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
2013-05-07201305080427AMND
2013-05-07201305080317AMND
2013-05-07201305080417AMND
2013-05-07201305080387AMND
2013-08-07201308080271AMND
2013-08-07201308080182AMND
2013-08-07201308080190AMND
2013-11-04201311050070AMND
2013-11-04201311050100AMND
2013-11-04201311050085AMND
2014-02-03201402040272AMND
2014-02-03201402040274AMND
2014-02-03201402040313AMND
2015-02-18201502200422AMND
2015-04-08201504090143AMND
2015-05-11201505120355AMND
2016-02-165810-907-1135ND
2016-02-165810-002-1045ND
2016-02-225701-002-1312ND
2016-03-075701-002-1459ND
2016-04-185701-002-1123ND
2016-05-025701-002-1328ND
2016-06-085701-002-1241ND
2016-06-305701-909-0849ND
2017-01-175701-002-1023ND
2017-02-085701-002-0939ND
2017-02-155810-907-1256ND
2017-02-155810-002-1243ND
2017-03-065701-002-1339ND
2017-04-175701-002-1222ND
2017-05-105701-002-1335ND
2017-06-195701-002-1338ND
2017-11-275701-002-1112ND
2017-12-065701-002-1335ND
2018-02-065701-002-1039ND
2018-02-075810-002-1229ND
2018-02-075810-907-1213ND
2019-01-305701-002-1241ND
2019-02-195701-002-1311ND
2019-02-205810-907-1344ND
2019-02-265810-002-1416ND