Know Your Environment. Protect Your Health.

Chromium (total)

Aromas Water 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
20202.00 ppb331.80 ppb - 2.10 ppb
2021N/A00N/A
2022N/A00N/A
20231.10 ppb32ND - 1.70 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
2020-10-26CA3510004_004_004-2020102610082.10 ppb
2020-10-26CA3510004_007_007-2020102609551.80 ppb
2020-10-26CA3510004_011_011-2020102608582.10 ppb
2023-04-03CA3510004_007_007-202304030923ND
2023-04-03CA3510004_004_004-2023040311501.70 ppb
2023-04-03CA3510004_011_011-2023040308501.60 ppb