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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Sweetwater Authority

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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87

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.119 ppb267ND - 0.990 ppb
20150.0329 ppb142ND - 0.230 ppb
2016ND120ND
2017ND110ND
2018ND120ND
2019ND120ND

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
2014-02-259588-005-1115ND
2014-02-259588-007-1110ND
2014-02-259588-017-0930ND
2014-02-259588-018-0855ND
2014-02-259588-019-0915ND
2014-02-259588-004-0910ND
2014-04-23201404240602AMND
2014-04-23201404240461AMND
2014-04-23201404240610AMND
2014-04-23201404240613AMND
2014-04-23201404240415AMND
2014-04-23201404240521AMND
2014-07-16201407170458AM0.220 ppb
2014-07-16201407170546AMND
2014-07-299588-005-1240ND
2014-07-299588-007-1230ND
2014-07-299588-017-0820ND
2014-07-299588-018-0935ND
2014-07-299588-019-0915ND
2014-07-299588-004-0910ND
2014-10-14201410160199AM0.460 ppb
2014-10-14201410160195AM0.430 ppb
2014-10-14201410160188AM0.990 ppb
2014-10-14201410160191AM0.580 ppb
2014-10-28201410300040AM0.210 ppb
2014-10-28201410300036AM0.200 ppb
2015-01-13201501150053AM0.230 ppb
2015-01-13201501150056AM0.230 ppb
2015-01-279588-018-0950ND
2015-01-279588-019-0930ND
2015-01-279588-017-0820ND
2015-01-279588-007-1240ND
2015-01-279588-005-1250ND
2015-01-279588-004-0920ND
2015-08-259588-019-1000ND
2015-08-259588-018-1005ND
2015-08-259588-004-0955ND
2015-08-259588-005-0740ND
2015-08-259588-017-0815ND
2015-08-259588-007-0750ND
2016-01-279588-007-0735ND
2016-01-279588-017-0950ND
2016-01-279588-019-1005ND
2016-01-279588-018-1010ND
2016-01-279588-005-0740ND
2016-01-279588-004-1000ND
2016-07-269588-005-1255ND
2016-07-269588-018-1055ND
2016-07-269588-007-1300ND
2016-07-269588-004-1035ND
2016-07-269588-017-0840ND
2016-07-269588-019-1040ND
2017-01-319588-005-1130ND
2017-01-319588-004-0955ND
2017-01-319588-007-1135ND
2017-01-319588-018-0905ND
2017-01-319588-019-0950ND
2017-10-039588-007-1135ND
2017-10-039588-018-1005ND
2017-10-039588-005-1130ND
2017-10-039588-017-1130ND
2017-10-039588-004-0945ND
2017-10-039588-019-0950ND
2018-01-309588-017-1110ND
2018-01-309588-007-0730ND
2018-01-309588-018-1010ND
2018-01-309588-004-1025ND
2018-01-309588-005-0735ND
2018-01-309588-019-1030ND
2018-11-279588-017-0839ND
2018-11-279588-018-1000ND
2018-11-279588-004-1012ND
2018-11-279588-019-1007ND
2018-11-289588-007-0745ND
2018-11-289588-005-0740ND
2019-02-279588-004-1218ND
2019-02-279588-018-1250ND
2019-02-279588-017-1015ND
2019-02-279588-019-1240ND
2019-02-289588-007-0820ND
2019-02-289588-005-0800ND
2019-08-279588-004-1000ND
2019-08-279588-019-1005ND
2019-08-279588-018-1035ND
2019-08-279588-017-0815ND
2019-08-289588-005-0730ND
2019-08-289588-007-0730ND