Know Your Environment. Protect Your Health.

Chromium (total)

Bradley Waterworks

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
20180.860 ppb53ND - 1.80 ppb
2019ND50ND
2020ND40ND
2021ND50ND
202214.8 ppb32ND - 39.0 ppb
202324.7 ppb2220.9 ppb - 28.4 ppb

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
2018-03-20Y180810018ND
2018-05-29Y1815100071.80 ppb
2018-05-29Y1815100061.000 ppb
2018-08-13Y1822800331.50 ppb
2018-10-16Y182910036ND
2019-02-25Y190590038ND
2019-05-13Y191360053ND
2019-08-12Y192270055ND
2019-11-05Y193110048ND
2019-11-05Y193110002ND
2020-03-02Y200650041ND
2020-06-02Y201560022ND
2020-08-18Y202330050ND
2020-11-07Y203240056ND
2021-02-23Y210560027ND
2021-04-19Y211110024ND
2021-04-19Y211110023ND
2021-07-26Y212100033ND
2021-11-16Y213230004ND
2022-02-14Y220480064ND
2022-08-15Y22230003739.0 ppb
2022-10-11Y2228500165.50 ppb
2023-02-22Y23055000620.9 ppb
2023-09-11Y23257003328.4 ppb