Know Your Environment. Protect Your Health.

Chromium (total)

Alta Sierra Mutual Water Company

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.

 

7

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
2019ND10ND
2020ND20ND
2021N/A00N/A
2022ND20ND
2023ND20ND

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
2019-05-13CA1500209_002_002-201905131005ND
2020-08-12CA1500209_001_001-202008121339ND
2020-08-12CA1500209_003_003-202008121225ND
2022-05-11CA1500209_002_002-202205111145ND
2022-11-29CA1500209_006_006-202211291100ND
2023-08-23CA1500209_001_001-202308231055ND
2023-08-23CA1500209_003_003-202308231105ND