Know Your Environment. Protect Your Health.

Chromium (total)

North Penn Water Authority

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND130ND
2019N/A00N/A
2020N/A00N/A
20210.0833 ppb121ND - 1.000 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
2018-01-082288413002ND
2018-01-082288413012ND
2018-01-082288413011ND
2018-01-082288413010ND
2018-01-082288413009ND
2018-01-082288413008ND
2018-01-082288413007ND
2018-01-082288413005ND
2018-01-082288413004ND
2018-01-082288413003ND
2018-01-082288413001ND
2018-01-082288413006ND
2018-06-042318792001ND
2021-01-2023713115.00ND
2021-01-2023713170.00ND
2021-01-2023713148.00ND
2021-01-2023713126.00ND
2021-01-2023713192.00ND
2021-01-2023713137.00ND
2021-01-2023713181.00ND
2021-01-2023713203.00ND
2021-01-2023713159.00ND
2021-05-0524438626.00ND
2021-08-0225023345.00ND
2021-10-1925405315.001.000 ppb