Know Your Environment. Protect Your Health.

Chromium (total)

Danbury Water Department

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND50ND
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
2018-04-12212690GEND
2018-04-12212687GEND
2018-10-12IOC1 200508940ND
2018-10-12IOC1 200508939ND
2019-04-11IOC1 200528182ND
2019-04-11IOC1 200528181ND
2019-04-11IOCR 200528185ND
2019-04-11IOCR 200528187ND
2019-05-16IOCR 200532591AND
2020-08-20IOCR 200587329ND
2020-08-20IOCR 200587327ND
2020-08-20IOC1 200587328ND
2020-08-20IOC1 200587330ND
2021-04-15IOC1 200613297ND
2021-04-15IOC1 200613295ND
2021-04-15IOCR 200613294ND
2021-04-15IOCR 200613296ND
2022-06-07287329ND
2022-06-07287325ND
2022-06-07287323ND
2022-06-07287327ND
2023-01-12304532ND
2023-01-12304533ND
2023-05-15N3E0590-02PPSND
2023-05-15N3E0590-01PPSND