Know Your Environment. Protect Your Health.

Chromium (total)

Aquarion Water Company of Ct-new Milford

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20190.500 ppb21ND - 1.000 ppb
20201.000 ppb111.000 ppb
20212.00 ppb112.00 ppb
2022ND60ND
2023ND10ND

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
2019-02-06201901756-IOC11.000 ppb
2019-02-06201901760-IOC1ND
2020-07-09202010466-IOC11.000 ppb
2021-02-18202102185-IOC12.00 ppb
2022-02-09202202269-IOC1ND
2022-02-09202202270-IOC1ND
2022-02-09202202273-IOC1ND
2022-02-14202202494-IOC1ND
2022-02-14202202508-IOC1ND
2022-08-30202215082-IOC1ND
2023-02-13202302330-IOC1ND