Know Your Environment. Protect Your Health.

Chromium (total)

Lockesburg 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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND60ND
2019ND30ND
2020ND30ND
2021ND40ND
20222.46 ppb54ND - 4.30 ppb
20232.93 ppb332.20 ppb - 3.90 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
2018-01-31Y180330008ND
2018-03-21Y180810021ND
2018-05-21Y181440037ND
2018-07-24Y182080024ND
2018-10-22Y182980021ND
2018-12-17Y183540003ND
2019-02-04Y190380080ND
2019-05-28Y191500001ND
2019-05-28Y191500002ND
2020-05-20Y201420040ND
2020-09-08Y202540052ND
2020-11-03Y203100058ND
2021-01-27Y210280015ND
2021-05-24Y211470039ND
2021-07-20Y212030013ND
2021-10-26Y213010024ND
2022-01-11Y220130041ND
2022-04-06Y2209700034.30 ppb
2022-04-06Y2209700042.70 ppb
2022-08-15Y2223000594.30 ppb
2022-10-19Y2229300391.000 ppb
2023-02-07Y2304000743.90 ppb
2023-02-07Y2304000732.20 ppb
2023-05-03Y2312400662.70 ppb