Know Your Environment. Protect Your Health.

Chromium (total)

North Central Texas Municipal Water Authority

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.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND40ND
20210.900 ppb41ND - 3.60 ppb
20220.933 ppb31ND - 2.80 ppb
2023ND30ND

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
2018-02-13Q1806366003ND
2018-05-15AE28106ND
2018-05-15AE28110ND
2018-05-15AE28112ND
2019-03-07Q1909867006ND
2019-05-14Q1925812001ND
2019-05-14Q1925812002ND
2019-05-14Q1925812003ND
2020-03-17Q2011709013ND
2020-03-17Q2011709005ND
2020-03-17Q2011709004ND
2020-03-17Q2011709003ND
2021-03-01Q2105128006ND
2021-03-01Q2105128007ND
2021-05-18Q21129670123.60 ppb
2021-08-24Q2122978007ND
2022-03-02Q2207242004ND
2022-03-02Q22072420052.80 ppb
2022-09-07Q2226614011ND
2023-03-08Q2309188004ND
2023-05-16Q2318416008ND
2023-09-05Q2338005002ND