Know Your Environment. Protect Your Health.

Chromium (total)

Aquarion Water Company of Connecticut - Greenwich System

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND40ND
2021ND40ND
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
2018-04-02201803870-IOCRND
2018-04-02201803873-IOC1ND
2018-10-01201815017-IOC1ND
2018-10-01201815016-IOCRND
2019-04-01201904114-IOC1ND
2019-04-01201904109-IOC1ND
2019-04-01201904111-IOCRND
2019-04-01201904110-IOCRND
2020-04-06202004726-IOC1ND
2020-04-06202004727-IOCRND
2020-04-07202004860-IOC1ND
2020-04-07202004857-IOCRND
2021-04-05202104315-IOC1ND
2021-04-05202104312-IOCRND
2021-05-10202106584-IOC1ND
2021-05-10202106585-IOCRND
2022-04-05202204953-IOC1ND
2022-04-05202204950-IOCRND
2022-05-16202207710-IOC1ND
2022-05-16202207707-IOCRND
2023-04-03202304838-IOC1ND
2023-04-03202304835-IOCRND
2023-06-06202309335-IOC1ND
2023-06-06202309336-IOCRND