Know Your Environment. Protect Your Health.

Chromium (total)

City of Wilsonville

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.

 

18

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND40ND
2021ND30ND
20221.60 ppb21ND - 3.20 ppb
2023ND10ND

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
2018-01-10201712040042-IND
2018-04-11201803050004-IND
2018-07-18201807190944-IND
2018-10-10201809030044-IND
2019-01-09201812030009-IND
2019-04-10201904110241-IND
2019-07-10201907110430-IND
2019-10-08201910090408-IND
2020-01-02202001030119-IND
2020-04-15202004160157-IND
2020-07-15202007160188-IND
2020-10-14202010150105-IND
2021-01-06202101070374-IND
2021-04-14202104150878-IND
2021-07-27202107280247-IND
2022-02-02202202030907-I3.20 ppb
2022-04-13202204140832-IND
2023-01-11380-34174-2-IND