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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Alameda County Water District

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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119

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.152 ppb3815ND - 0.730 ppb
2015ND170ND
2016ND160ND
2017ND160ND
2018ND160ND
2019ND160ND

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
2014-03-045401-038-0925ND
2014-03-045401-040-0845ND
2014-03-045401-041-0930ND
2014-03-045401-053-0955ND
2014-03-24201403250220AMND
2014-03-24201403250197AM0.310 ppb
2014-03-24201403250212AMND
2014-03-24201403250195AMND
2014-03-24201403250270AM0.310 ppb
2014-03-24201403250222AMND
2014-03-24201403250273AMND
2014-06-02201406030454AMND
2014-06-02201406030460AMND
2014-06-02201406030462AMND
2014-06-02201406030464AM0.210 ppb
2014-06-02201406030458AM0.220 ppb
2014-06-02201406030452AMND
2014-06-02201406030456AMND
2014-07-215401-038-0955ND
2014-07-215401-041-0955ND
2014-07-225401-040-0925ND
2014-07-225401-053-0905ND
2014-09-08201409090360AM0.340 ppb
2014-09-08201409090362AM0.450 ppb
2014-09-08201409090386AM0.410 ppb
2014-09-08201409090364AM0.380 ppb
2014-09-08201409090358AMND
2014-09-08201409090356AM0.400 ppb
2014-09-08201409090384AM0.730 ppb
2014-10-145401-038-1000ND
2014-10-145401-040-0900ND
2014-10-145401-041-1025ND
2014-10-145401-053-1145ND
2014-12-08201412090321AM0.470 ppb
2014-12-08201412090325AM0.530 ppb
2014-12-08201412090323AM0.390 ppb
2014-12-08201412090319AM0.250 ppb
2014-12-08201412090317AM0.380 ppb
2015-01-275401-038-0955ND
2015-01-275401-040-1015ND
2015-01-275401-041-0945ND
2015-01-275401-053-1047ND
2015-04-215401-038-0945ND
2015-04-215401-040-0910ND
2015-04-215401-041-0935ND
2015-04-215401-053-1010ND
2015-06-095401-015-1120ND
2015-07-065401-038-1000ND
2015-07-065401-040-1105ND
2015-07-065401-041-0921ND
2015-07-215401-053-0905ND
2015-10-205401-038-1035ND
2015-10-205401-040-0940ND
2015-10-205401-041-1025ND
2015-10-205401-053-1115ND
2016-01-195401-038-0855ND
2016-01-195401-040-1035ND
2016-01-195401-041-0910ND
2016-01-195401-053-0935ND
2016-04-265401-038-1035ND
2016-04-265401-040-0945ND
2016-04-265401-041-1025ND
2016-05-105401-053-0915ND
2016-07-115401-038-0850ND
2016-07-115401-041-0820ND
2016-07-195401-040-0825ND
2016-07-195401-053-0955ND
2016-10-045401-038-0905ND
2016-10-045401-040-0825ND
2016-10-045401-041-0855ND
2016-10-045401-053-0925ND
2017-01-175401-038-0925ND
2017-01-175401-040-0937ND
2017-01-175401-041-0925ND
2017-01-175401-053-1025ND
2017-04-185401-038-0925ND
2017-04-185401-040-0820ND
2017-04-185401-041-0910ND
2017-04-185401-053-0948ND
2017-07-175401-038-1030ND
2017-07-175401-041-1005ND
2017-07-255401-040-0915ND
2017-07-255401-053-1032ND
2017-10-035401-038-0915ND
2017-10-035401-040-0857ND
2017-10-035401-041-0925ND
2017-10-035401-053-0958ND
2018-01-165401-038-1110ND
2018-01-165401-040-0920ND
2018-01-165401-041-1025ND
2018-01-165401-053-1050ND
2018-04-175401-038-0926ND
2018-04-175401-040-0835ND
2018-04-175401-041-0939ND
2018-04-175401-053-1003ND
2018-07-115401-038-0726ND
2018-07-115401-041-0755ND
2018-07-175401-040-0850ND
2018-07-175401-053-0845ND
2018-10-165401-038-0950ND
2018-10-165401-040-0820ND
2018-10-165401-041-1005ND
2018-10-165401-053-1035ND
2019-02-055401-038-0940ND
2019-02-055401-040-0820ND
2019-02-055401-041-0930ND
2019-02-055401-053-1000ND
2019-05-135401-053-0955ND
2019-05-145401-038-0900ND
2019-05-145401-040-0815ND
2019-05-145401-041-0915ND
2019-07-165401-038-0935ND
2019-07-165401-040-0755ND
2019-07-165401-041-1000ND
2019-07-165401-053-1030ND
2019-10-155401-038-0925ND
2019-10-155401-040-0825ND
2019-10-155401-041-0910ND
2019-10-155401-053-1000ND