Know Your Environment. Protect Your Health.

Chromium (total)

Smackover Waterworks

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND10ND
2019N/A00N/A
2020ND40ND
20210.420 ppb51ND - 2.10 ppb
20227.90 ppb331.20 ppb - 12.7 ppb
20234.97 ppb331.10 ppb - 12.3 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
2018-01-30Y180320010ND
2020-01-27Y200300007ND
2020-01-27Y200300006ND
2020-09-15Y202610054ND
2020-11-16Y203240059ND
2021-01-26Y210280032ND
2021-01-26Y210280038ND
2021-06-07Y211610002ND
2021-08-23Y2123800612.10 ppb
2021-11-08Y213160011ND
2022-05-24Y2214600579.80 ppb
2022-08-16Y22230006312.7 ppb
2022-11-07Y2231300731.20 ppb
2023-01-31Y2303300091.50 ppb
2023-01-31Y2303300101.10 ppb
2023-05-31Y23152003612.3 ppb