Chromium (total)
Westchester County WD #2
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 | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 2 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 2 | 0 | ND |
| 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 |
|---|---|---|
| 2018-05-11 | 7051461001 INP | ND |
| 2019-05-31 | 7091711001 INP | ND |
| 2020-05-08 | 70130562 INP | ND |
| 2020-11-12 | AW21843-INP | ND |
| 2021-06-04 | 70175718001-INP | ND |
| 2021-07-27 | AX14931-INP | ND |
| 2022-05-13 | 70214739001-INP | ND |
| 2022-09-21 | AY17010-INP | ND |
| 2023-05-05 | 70255449001-INP | ND |
| 2023-07-27 | AZ13680-INP | ND |