Know Your Environment. Protect Your Health.

Chromium (total)

Gurdon 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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND50ND
2020ND20ND
2021ND30ND
20222.82 ppb64ND - 6.20 ppb
20234.47 ppb333.00 ppb - 5.90 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
2018-04-24Y181150010ND
2018-04-24Y181150011ND
2019-01-23Y190240003ND
2019-04-30Y191220035ND
2019-04-30Y191220044ND
2019-09-24Y192690006ND
2019-12-10Y193460028ND
2020-05-12Y201350026ND
2020-05-12Y201350027ND
2021-04-05Y210980009ND
2021-04-05Y210980008ND
2021-05-10Y211330026ND
2022-02-07Y220410001ND
2022-05-04Y2212500183.40 ppb
2022-05-04Y2212500221.90 ppb
2022-06-13Y2216700336.20 ppb
2022-07-11Y2219500635.40 ppb
2022-10-03Y222790057ND
2023-02-13Y2304700455.90 ppb
2023-05-08Y2313100233.00 ppb
2023-05-08Y2313100354.50 ppb