Know Your Environment. Protect Your Health.

Chromium (total)

City of Lancaster

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
2018ND20ND
2019ND20ND
20201.000 ppb21ND - 2.00 ppb
20210.500 ppb21ND - 1.000 ppb
2022ND20ND
2023ND20ND

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
2018-04-232311696001ND
2018-04-232311696002ND
2019-01-313013972001ND
2019-01-313013972003ND
2020-04-3022366206.00ND
2020-04-3022366218.002.00 ppb
2021-05-1324591444.00ND
2021-05-1324591457.001.000 ppb
2022-03-2226421129.00ND
2022-03-2226421141.00ND
2023-03-2928856087.00ND
2023-03-2928856088.00ND