Know Your Environment. Protect Your Health.

Chromium (total)

San Miguel Community Services 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.

 

6

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
2019N/A00N/A
2020ND30ND
2021N/A00N/A
2022N/A00N/A
2023ND30ND

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
2020-05-26CA4010010_005_005-202005261040ND
2020-05-26CA4010010_009_009-202005260958ND
2020-05-26CA4010010_004_004-202005261052ND
2023-05-02CA4010010_009_009-202305021313ND
2023-05-02CA4010010_005_005-202305021020ND
2023-05-04CA4010010_004_004-202305040815ND