Know Your Environment. Protect Your Health.

Chromium (total)

Bristol 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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
2019ND40ND
2020ND50ND
2021ND20ND
2022ND30ND
2023ND50ND

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
2018-03-07D8C0471-01IOCRND
2018-03-07D8C0468-01IOCND
2019-03-27D9C2626-01IOCRND
2019-05-15D9E1655-01IOCRND
2019-05-15D9E1655-01IOCND
2019-10-28D9J2582-01IOCRND
2020-01-31D0A2598-01IOCRND
2020-01-31D0A2596-04IOCND
2020-01-31D0A2596-03IOCND
2020-01-31D0A2596-02IOCND
2020-01-31D0A2596-01IOCND
2021-02-25D1B2170-01IOCND
2021-12-1621121612-001-IOCND
2022-02-03D2B0373-01IOCND
2022-04-07D2D0790-01IOCND
2022-05-05D2E0587-01IOCND
2023-02-23D3B2333-01IOCND
2023-02-23D3B2333-02IOCND
2023-02-23D3B2333-03IOCND
2023-02-23D3B2333-04IOCND
2023-02-23D3B2331-01IOCND