Chromium (total)
Avon Village
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 | 2.10 ppb | 1 | 1 | 2.10 ppb |
| 2019 | ND | 1 | 0 | ND |
| 2020 | 3.60 ppb | 1 | 1 | 3.60 ppb |
| 2021 | ND | 1 | 0 | ND |
| 2022 | 2.60 ppb | 1 | 1 | 2.60 ppb |
| 2023 | 3.10 ppb | 1 | 1 | 3.10 ppb |
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 |
|---|---|---|
| 2018-12-06 | 1820702-001IOC | 2.10 ppb |
| 2019-07-01 | EHS1900033692-PRI | ND |
| 2020-12-23 | 2020920-001E | 3.60 ppb |
| 2021-12-21 | 2121315-001E | ND |
| 2022-12-20 | 2220322-001E | 2.60 ppb |
| 2023-12-12 | 2318465-001E | 3.10 ppb |