Know Your Environment. Protect Your Health.

Chromium (total)

Collegeville Trappe Joint Public Works Department

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.

 

17

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND70ND
2019N/A00N/A
2020N/A00N/A
20210.500 ppb104ND - 2.00 ppb
2022N/A00N/A
2023N/A00N/A

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
2018-03-058032060-02ND
2018-03-058032060-03ND
2018-03-058032060-04ND
2018-03-058032060-05ND
2018-03-058032060-06ND
2018-03-058032060-07ND
2018-03-058032060-01ND
2021-01-1823711148.00ND
2021-01-1823711158.00ND
2021-01-1823711168.00ND
2021-01-1823711178.00ND
2021-01-1823711188.00ND
2021-02-0323887250.001.000 ppb
2021-02-0323887240.002.00 ppb
2021-02-0323887230.001.000 ppb
2021-02-0323887220.001.000 ppb
2021-04-1924246150.00ND