Know Your Environment. Protect Your Health.

Chromium (total)

Aquarion Water Company of Connecticut - Stamford

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND20ND
2020ND40ND
2021ND20ND
2022ND40ND
2023ND40ND

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
2018-01-02201800021-IOC1ND
2018-01-02201800018-IOCRND
2019-01-07201900231-IOCRND
2019-01-07201900234-IOC1ND
2020-01-06202000151-IOCRND
2020-01-06202000154-IOC1ND
2020-07-06202010216-IOCRND
2020-07-06202010220-IOC1ND
2021-01-04202100057-IOC1ND
2021-01-04202100054-IOCRND
2022-01-03202200070-IOCRND
2022-01-03202200073-IOC1ND
2022-07-18202212143-IOCRND
2022-07-18202212142-IOC1ND
2023-01-03202300186-IOCRND
2023-01-03202300189-IOC1ND
2023-08-07202313852-IOCRND
2023-08-07202313851-IOC1ND