Know Your Environment. Protect Your Health.

Chromium (total)

Ruston 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.

 

22

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
2020ND120ND
2021N/A00N/A
2022N/A00N/A
2023ND100ND

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
2020-01-06B2000117-001ND
2020-01-13B2000162-008ND
2020-01-13B2000162-001ND
2020-01-13B2000162-002ND
2020-01-13B2000162-003ND
2020-01-13B2000162-004ND
2020-01-13B2000162-005ND
2020-01-13B2000162-006ND
2020-01-13B2000162-007ND
2020-06-2235558556001ND
2020-06-2235558556002ND
2020-12-08B2006533-001ND
2023-02-27B2300832-001ND
2023-02-27B2300832-002ND
2023-02-27B2300832-003ND
2023-02-27B2300832-004ND
2023-02-27B2300832-005ND
2023-03-06B2300980-001ND
2023-03-06B2300980-002ND
2023-03-06B2300980-003ND
2023-03-06B2300980-004ND
2023-03-06B2300980-005ND