Know Your Environment. Protect Your Health.

Chromium (total)

Metropolitan District Commission

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.

 

41

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND70ND
2019ND70ND
2020ND70ND
2021ND60ND
2022ND70ND
2023ND70ND

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
2018-07-18AE01630GEND
2018-07-18AE01631GEND
2018-07-18AE01636GEND
2018-07-18AE01637GEND
2018-07-18AE01640GEND
2018-07-18AE01632GEND
2018-07-18AE01641GEND
2019-12-03CE70736ND
2019-12-03CE70735ND
2019-12-03CE70734ND
2019-12-03CE70733ND
2019-12-03CE70741ND
2019-12-03CE70739ND
2019-12-03CE70740ND
2020-12-08IOC1 200600637ND
2020-12-08IOC1 200600611ND
2020-12-08IOCR 200600614ND
2020-12-08IOCR 200600615ND
2020-12-08IOCR 200600616ND
2020-12-08IOCR 200600617ND
2020-12-09IOC1 200600603ND
2021-11-23I300107476 300107479ND
2021-11-23E300107451 300107460ND
2021-11-29E300109635 300109640ND
2021-11-29I300109610 300109613ND
2021-11-30I300109649 300109653ND
2021-11-30I300109650 300109659ND
2022-12-08I300283837 300283842ND
2022-12-08300283822 300283827BND
2022-12-15E300287100 300287104ND
2022-12-15I300287081 300287086ND
2022-12-15I300287109 300287112ND
2022-12-15E300287072 300287076ND
2022-12-15E300287053 300287057ND
2023-12-05E300456248 300456251ND
2023-12-05I300456268 300456271ND
2023-12-05I300456261 300456264ND
2023-12-05I300456281 300456284ND
2023-12-06E300456222 300456225ND
2023-12-06E300456228 300456231ND
2023-12-06I300456234 300456237ND