Know Your Environment. Protect Your Health.

Chromium (total)

Hollister Ranch Estates

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

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20194.05 ppb223.70 ppb - 4.40 ppb
2020N/A00N/A
2021N/A00N/A
202219.7 ppb2211.9 ppb - 27.4 ppb
202312.5 ppb1112.5 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
2019-12-09CA3500904_002_002-2019120912553.70 ppb
2019-12-09CA3500904_001_001-2019120912384.40 ppb
2022-12-12CA3500904_002_002-20221212125527.4 ppb
2022-12-12CA3500904_001_001-20221212124011.9 ppb
2023-10-10CA3500904_006_006-20231010091012.5 ppb