Know Your Environment. Protect Your Health.

Chromium (total)

Dierks Water Works

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
2018ND10ND
2019ND10ND
20200.500 ppb41ND - 2.00 ppb
20210.375 ppb41ND - 1.50 ppb
2022ND10ND
20232.00 ppb112.00 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
2018-02-13Y180460002ND
2019-01-15Y190170016ND
2020-01-29Y2003000012.00 ppb
2020-09-02Y202470023ND
2020-09-14Y202610053ND
2020-11-04Y203100053ND
2021-01-26Y210280007ND
2021-04-14Y211050044ND
2021-08-03Y2121700401.50 ppb
2021-10-19Y212940026ND
2022-01-11Y220130003ND
2023-01-11Y2301100092.00 ppb