Know Your Environment. Protect Your Health.

Chromium (total)

Rancheritos 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.

 

5

Samples

1

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019ND20ND
2020ND10ND
2021N/A00N/A
2022N/A00N/A
202385.0 ppb21ND - 170.0 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
2019-02-18CA3600200_003_003-201902181030ND
2019-08-19CA3600200_001_001-201908190930ND
2020-10-13CA3600200_002_002-202010131255ND
2023-01-23CA3600200_003_003-202301231148ND
2023-08-07CA3600200_001_001-202308071145170.0 ppb