Know Your Environment. Protect Your Health.

Chromium (total)

Rockwood People's Utilities Department

NOTE: Rockwood People's Utilities Department purchases water from Portland Water Bureau which is required to test for chromium (total). Sample information shown below was taken by Portland Water Bureau.

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
2019ND10ND
2020ND20ND
2021ND20ND
2022ND10ND
2023ND20ND

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

NOTE: Rockwood People's Utilities Department purchases water from Portland Water Bureau which is required to test for chromium (total). Sample information shown below was taken by Portland Water Bureau.

Date Lab ID Result
2018-03-15BC03118-IND
2018-04-03BC04117-IND
2019-04-02BC21049-IND
2019-07-15BC25289-IND
2020-05-12BC38533-IND
2020-08-05BC41646-IND
2021-04-06BC53668-IND
2021-08-04BC60213-IND
2022-04-05BC75262-IND
2022-08-03BC85642-IND
2023-04-04BC96020-IND
2023-08-29BD02264-IND