Know Your Environment. Protect Your Health.

Chromium (total)

Pontchatoula Water System

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019N/A00N/A
2020N/A00N/A
2021ND50ND
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
2018-02-27AE20755ND
2018-02-27AE20764ND
2018-02-27AE20767ND
2018-02-27AE20755ND
2018-02-27AE20764ND
2018-02-27AE20767ND
2021-02-08B2100562-001ND
2021-02-08B2100562-002ND
2021-02-08B2100562-003ND
2021-03-10B2101085-001ND
2021-03-10B2101087-001ND