Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Chromium (total)

California Water Service Company - Dominguez

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.

 

60

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND10ND
2013ND60ND
20140.326 ppb3212ND - 5.90 ppb
20150.178 ppb95ND - 0.730 ppb
2016ND60ND
2017ND60ND

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
2012-08-205810-018-1124ND
2013-03-135810-024-1047ND
2013-05-085810-036-1143ND
2013-06-185810-023-1312ND
2013-07-175810-050-1442ND
2013-09-195810-004-1430ND
2013-10-165810-022-1400ND
2014-04-02201404030204AMND
2014-04-02201404030195AMND
2014-04-02201404030213AMND
2014-04-02201404030189AM5.90 ppb
2014-04-09201404100037AMND
2014-04-09201404100025AMND
2014-04-09201404100019AMND
2014-04-09201404100047AMND
2014-04-16201404161004AMND
2014-04-16201404161013AMND
2014-04-16201404161022AMND
2014-04-23201404230764AMND
2014-04-23201404230775AMND
2014-07-095701-050-13401.66 ppb
2014-07-16201407160955AMND
2014-07-16201407160949AMND
2014-07-16201407160940AMND
2014-07-17201407170889AMND
2014-07-17201407170898AMND
2014-08-275810-016-1310ND
2014-10-01201410010702AM0.320 ppb
2014-10-01201410010682AM0.360 ppb
2014-10-085810-019-1022ND
2014-10-15201410160142AM0.200 ppb
2014-10-15201410160127AM0.220 ppb
2014-10-15201410160133AM0.340 ppb
2014-10-15201410160151AMND
2014-10-22201410220541AM0.260 ppb
2014-10-22201410220563AM0.250 ppb
2014-10-22201410220555AM0.280 ppb
2014-10-29201410290732AM0.420 ppb
2014-11-12201411130315AM0.230 ppb
2015-01-07201501080025AMND
2015-01-07201501070700AMND
2015-01-08201501080795AM0.200 ppb
2015-01-08201501080801AM0.220 ppb
2015-01-14201501141131AM0.250 ppb
2015-01-14201501150026AM0.730 ppb
2015-01-14201501141005AMND
2015-01-14201501141018AM0.200 ppb
2015-03-259590-018-1355ND
2016-01-135810-023-1320ND
2016-03-239590-018-1340ND
2016-05-115810-036-1140ND
2016-07-135810-050-1335ND
2016-09-075810-004-1300ND
2016-12-289590-019-0930ND
2017-03-089590-019-1430ND
2017-08-235810-019-1100ND
2017-08-235810-016-1212ND
2017-10-119590-036-1335ND
2017-10-169590-805-1030ND
2017-12-265810-024-1315ND