Know Your Environment. Protect Your Health.

Chromium (total)

Mountain Springs Water Supply Corporation

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.

 

8

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND40ND
2020N/A00N/A
2021N/A00N/A
20227.50 ppb445.70 ppb - 8.40 ppb
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2019-01-28Q1904051005ND
2019-01-28Q1904051018ND
2019-01-28Q1904051019ND
2019-01-28Q1904051020ND
2022-10-18Q22317350027.90 ppb
2022-10-18Q22317350038.00 ppb
2022-10-18Q22317350048.40 ppb
2022-10-18Q22317350085.70 ppb