Know Your Environment. Protect Your Health.

Chromium (total)

St. Tam Parish-faubourg-coquille

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.

 

12

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
2020ND40ND
2021ND20ND
2022N/A00N/A
20231.67 ppb61ND - 10.00 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
2020-06-09B2002822-001ND
2020-06-09B2002822-002ND
2020-06-09B2002822-003ND
2020-10-26B2005704-001ND
2021-06-22B2102804-001ND
2021-06-22B2102804-002ND
2023-06-26B2302638-001ND
2023-06-26B2302638-002ND
2023-06-26B2302638-00310.00 ppb
2023-06-26B2302638-004ND
2023-07-10B2302804-001ND
2023-07-10B2302804-002ND