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EWG's Tap Water Database — 2021 UPDATE

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Chromium (total)

Highridge Water 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.

MORE ABOUT THIS CONTAMINANT

 

28

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.0233 ppb182ND - 0.210 ppb
2015ND20ND
2016ND20ND
2017ND20ND
2018ND20ND
2019ND20ND

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
2014-03-20201403210321AMND
2014-03-20201403210323AMND
2014-03-20201403210319AMND
2014-03-20201403210325AMND
2014-05-141416404ND
2014-05-141416404ND
2014-06-23201406250139AMND
2014-06-23201406250154AMND
2014-06-23201406250145AMND
2014-06-23201406250143AMND
2014-09-09201409110757AMND
2014-09-09201409110799AMND
2014-09-09201409110659AMND
2014-09-09201409110806AMND
2014-12-08201412090689AM0.210 ppb
2014-12-08201412090285AMND
2014-12-08201412090189AMND
2014-12-08201412090735AM0.210 ppb
2015-03-1812579448ND
2015-03-1812579444ND
2016-03-1614050092ND
2016-03-1614050088ND
2017-06-0716349502ND
2017-06-0716349501ND
2018-03-287046769002ND
2018-03-287046769001ND
2019-03-057081621002ND
2019-03-057081621001ND