Chromium (total)
Paw Penn District
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 | 7 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 7 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2018-07-16 | 40207101 | ND |
| 2018-07-16 | 40205301 | ND |
| 2018-07-16 | 40205501 | ND |
| 2018-07-16 | 40205701 | ND |
| 2018-07-16 | 40206001 | ND |
| 2018-07-16 | 40206501 | ND |
| 2018-07-16 | 40206901 | ND |
| 2019-07-15 | 45716201 | ND |
| 2019-10-31 | 43999601 | ND |
| 2021-08-05 | 25067605.00 | ND |
| 2021-08-05 | 25067617.00 | ND |
| 2021-08-05 | 25067629.00 | ND |
| 2021-08-05 | 25067641.00 | ND |
| 2021-08-05 | 25067653.00 | ND |
| 2021-08-05 | 25067581.00 | ND |
| 2021-08-05 | 25067593.00 | ND |