Know Your Environment. Protect Your Health.

Chromium (total)

Mustang Valley Water Supply Corporation

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.

 

10

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.420 ppb52ND - 1.10 ppb
2019N/A00N/A
2020N/A00N/A
20213.38 ppb552.20 ppb - 3.90 ppb
2022N/A00N/A
2023N/A00N/A

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
2018-02-20Q1806881004ND
2018-11-28Q1848373010ND
2018-11-28Q18483730111.10 ppb
2018-11-28Q18483730121.000 ppb
2018-11-28Q1848373013ND
2021-07-28Q21197590033.90 ppb
2021-07-28Q21197590042.20 ppb
2021-07-28Q21197590053.80 ppb
2021-07-28Q21197590143.80 ppb
2021-07-28Q21197590153.20 ppb