Chromium (total)
Windham Water Works
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 | 3 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | 1.50 ppb | 2 | 1 | ND - 3.00 ppb |
| 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 |
|---|---|---|
| 2018-10-16 | CB72346 | ND |
| 2018-10-16 | CB72345 | ND |
| 2019-05-21 | CD18365R | ND |
| 2019-05-21 | CD18365 | ND |
| 2019-05-21 | CD18364 | ND |
| 2020-09-02 | CG66837 | ND |
| 2020-10-06 | CG91425 | ND |
| 2021-10-12 | CJ53828 | ND |
| 2021-11-02 | CJ70156 | ND |
| 2022-11-30 | CM93814 | ND |
| 2022-11-30 | CM93813 | 3.00 ppb |
| 2023-10-31 | CP37958 | ND |
| 2023-11-07 | CP42173 | ND |