Know Your Environment. Protect Your Health.

Chromium (total)

West Monroe 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.

 

15

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019N/A00N/A
2020ND60ND
2021ND10ND
2022N/A00N/A
20233.30 ppb63ND - 6.80 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
2018-07-1635405319001ND
2018-07-1635405319001ND
2020-02-17B2000817-001ND
2020-02-17B2000817-002ND
2020-08-19B2004170-001ND
2020-08-19B2004170-002ND
2020-08-19B2004170-003ND
2020-08-19B2004170-004ND
2021-06-15B2102723-001ND
2023-06-20B2302495-0016.40 ppb
2023-06-20B2302495-0026.80 ppb
2023-06-20B2302495-0036.60 ppb
2023-06-26B2302590-002ND
2023-06-26B2302590-003ND
2023-07-11B2302790-001ND