Chromium (total)
Sunnyhill 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 | 1.20 ppb | 3 | 3 | 0.600 ppb - 2.10 ppb |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.500 ppb | 1 | 1 | 0.500 ppb |
| 2022 | ND | 2 | 0 | ND |
| 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 |
|---|---|---|
| 2018-09-12 | 180913-011IN | 2.10 ppb |
| 2018-09-12 | 180913-012IN | 0.900 ppb |
| 2018-10-24 | 181025-023IN | 0.600 ppb |
| 2021-01-11 | IN-210112-001 | 0.500 ppb |
| 2022-10-12 | IN-221013-021 | ND |
| 2022-10-12 | IN-221013-022 | ND |