Chromium (total)
Blaine
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 | 1 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 3 | 0 | ND |
| 2023 | ND | 2 | 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
| Date | Lab ID | Result |
|---|---|---|
| 2018-02-28 | 18B1345-02 | ND |
| 2020-08-31 | 20H2390-02 | ND |
| 2020-08-31 | 20H2390-03 | ND |
| 2021-02-03 | 21B0180-01 | ND |
| 2021-08-06 | 21H0525-03 | ND |
| 2021-08-06 | 21H0525-04 | ND |
| 2021-10-26 | 21J1368-01 | ND |
| 2022-09-21 | 22I1864-01 | ND |
| 2022-09-30 | 22I2368-01 | ND |
| 2022-09-30 | 22I2368-02 | ND |
| 2023-08-18 | 23H2092-01 | ND |
| 2023-09-15 | 23I0864-01 | ND |