Chromium (total)
City of Beaverton
NOTE: City of Beaverton purchases water from Joint Water Commission which is required to test for chromium (total). Sample information shown below was taken by Joint Water 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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 7 | 0 | ND |
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: City of Beaverton purchases water from Joint Water Commission which is required to test for chromium (total). Sample information shown below was taken by Joint Water Commission.
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-07 | 1809141-I | ND |
| 2018-11-05 | 1884309-I | ND |
| 2019-04-24 | 1928990-I | ND |
| 2019-11-04 | 1981259-I | ND |
| 2020-04-01 | 2021522-I | ND |
| 2020-11-04 | 2074434-I | ND |
| 2021-04-07 | 2123163-I | ND |
| 2021-11-03 | 2180764-I | ND |
| 2022-03-31 | 2221619-I | ND |
| 2023-04-10 | 23-19663-I | ND |
| 2023-11-06 | 23-67484-I | ND |