Know Your Environment. Protect Your Health.

Chromium (total)

City of Aubrey

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.

 

9

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND30ND
2019ND10ND
2020N/A00N/A
20214.40 ppb333.90 ppb - 5.20 ppb
20225.50 ppb115.50 ppb
2023ND10ND

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
2018-03-15Q1810837013ND
2018-03-15Q1810837014ND
2018-03-15Q1810837015ND
2019-05-15Q1926233009ND
2021-07-01Q21173700054.10 ppb
2021-07-01Q21173700065.20 ppb
2021-07-01Q21173700203.90 ppb
2022-10-13Q22310650105.50 ppb
2023-04-11AG38754ND