Know Your Environment. Protect Your Health.

Chromium (total)

Aquarion Water Company of Connecticut - Mystic

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.

 

13

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND20ND
2021ND30ND
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
2018-05-07201806155-IOC1ND
2018-05-07201806152-IOCRND
2019-05-07201906220-IOC1ND
2019-05-07201906217-IOCRND
2020-05-04202006226-IOC1ND
2020-05-04202006223-IOCRND
2021-05-03202106129-IOC1ND
2021-05-03202106135-IOC1ND
2021-05-03202106126-IOCRND
2022-05-02202206699-IOC1ND
2022-07-18202212124-IOCRND
2023-05-01202306890-IOC1ND
2023-05-01202306887-IOCRND