Know Your Environment. Protect Your Health.

Chromium (total)

Utrwd Regional Water Treatment Plant

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.

 

12

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND20ND
20190.650 ppb21ND - 1.30 ppb
20200.850 ppb21ND - 1.70 ppb
2021ND20ND
2022ND20ND
20230.950 ppb21ND - 1.90 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
2018-02-13Q1805957002ND
2018-09-25Q1838256002ND
2019-03-07Q1909910003ND
2019-10-02Q19711120021.30 ppb
2020-03-09Q2008448002ND
2020-08-18Q20328590071.70 ppb
2021-02-23Q2104596002ND
2021-09-27Q2126305007ND
2022-01-25Q2202436002ND
2022-09-15Q2227673009ND
2023-03-07Q2308901003ND
2023-08-02Q23314450071.90 ppb