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EWG's Tap Water Database — 2021 UPDATE

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Chromium (hexavalent)

California Water Service Company - Dominguez

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).

MORE ABOUT THIS CONTAMINANT

 

52

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0213 ppb4018ND - 0.0650 ppb
20150.0330 ppb86ND - 0.0580 ppb
2016ND20ND
2017ND10ND
2018N/A00N/A
2019ND10ND

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
2014-04-02201404030197AM0.0380 ppb
2014-04-02201404030212AM0.0350 ppb
2014-04-02201404030188AM0.0450 ppb
2014-04-02201404030205AMND
2014-04-09201404100046AMND
2014-04-09201404100027AM0.0520 ppb
2014-04-09201404100036AMND
2014-04-09201404100018AMND
2014-04-16201404161012AM0.0620 ppb
2014-04-16201404161003AMND
2014-04-16201404161023AM0.0440 ppb
2014-04-23201404230774AM0.0430 ppb
2014-04-23201404230763AM0.0540 ppb
2014-07-09201407100248AM0.0510 ppb
2014-07-09201407100238AM0.0650 ppb
2014-07-16201407160941AMND
2014-07-16201407160957AM0.0440 ppb
2014-07-16201407160948AMND
2014-07-17201407170897AM0.0470 ppb
2014-07-17201407170888AM0.0580 ppb
2014-09-049590-023-1359ND
2014-09-049590-004-1040ND
2014-09-049590-018-1340ND
2014-09-049590-019-0945ND
2014-09-049590-050-1435ND
2014-09-049590-024-1025ND
2014-09-249590-016-1412ND
2014-10-01201410010683AM0.0410 ppb
2014-10-01201410010693AM0.0530 ppb
2014-10-01201410010701AM0.0470 ppb
2014-10-15201410160150AMND
2014-10-15201410160126AMND
2014-10-15201410160135AMND
2014-10-15201410160141AMND
2014-10-22201410220565AM0.0380 ppb
2014-10-22201410220554AM0.0330 ppb
2014-10-22201410220540AMND
2014-10-309590-022-1320ND
2014-10-31201410310238AMND
2014-11-199590-036-1128ND
2015-01-07201501080026AMND
2015-01-07201501070699AMND
2015-01-08201501080794AM0.0460 ppb
2015-01-08201501080802AM0.0430 ppb
2015-01-14201501150025AM0.0310 ppb
2015-01-14201501141130AM0.0580 ppb
2015-01-14201501141017AM0.0440 ppb
2015-01-14201501141006AM0.0420 ppb
2016-03-239590-018-1340ND
2016-12-289590-019-0930ND
2017-03-089590-019-1430ND
2019-02-219590-065-1345ND