Know Your Environment. Protect Your Health.

Chromium (total)

Butano Canyon Mutual

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
2018ND10ND
2019ND10ND
2020ND10ND
2021ND20ND
2022ND10ND
20231.85 ppb221.40 ppb - 2.30 ppb

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
2018-01-10CA4100503_001_001-201801101110ND
2019-01-03CA4100503_001_001-201901031115ND
2020-01-09CA4100503_001_001-202001091210ND
2021-01-07CA4100503_001_001-202101071154ND
2021-10-20CA4100503_001_001-202110200845ND
2022-10-06CA4100503_001_001-202210060845ND
2023-11-20CA4100503_001_001-2023112013002.30 ppb
2023-11-20CA4100503_002_002-2023112012501.40 ppb