Chromium (total)
Sugarloaf Water Association
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 | 1 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | 0.473 ppb | 3 | 1 | ND - 1.42 ppb |
| 2022 | ND | 2 | 0 | ND |
| 2023 | ND | 3 | 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 |
|---|---|---|
| 2018-09-04 | 401802596 | ND |
| 2018-11-06 | 401803359 | ND |
| 2019-09-04 | 401903057 | ND |
| 2020-06-22 | 452000618 | ND |
| 2020-06-22 | 452000617 | ND |
| 2020-06-22 | 452000616C | ND |
| 2021-06-10 | 452100721C | ND |
| 2021-06-10 | 452100720C | 1.42 ppb |
| 2021-10-06 | 2116626-01 | ND |
| 2022-12-20 | 452201857C | ND |
| 2022-12-20 | 452201857 | ND |
| 2023-06-13 | 452301008C | ND |
| 2023-06-13 | 452301007C | ND |
| 2023-11-22 | 452302351C | ND |