Chromium (total)
Mount Kisco Water Department
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 | 2 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | 2.33 ppb | 6 | 2 | ND - 7.00 ppb |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2018-06-28 | 420-138864-1-INP | ND |
| 2018-06-28 | 420-138864-2-INP | ND |
| 2019-10-24 | 420-162378-2-INP | ND |
| 2019-10-24 | 420-162378-1-INP | ND |
| 2020-04-23 | AW07616-INP | ND |
| 2020-04-23 | AW07618-INP | ND |
| 2020-04-23 | AW07614-INP | ND |
| 2020-08-28 | 420-179605-2-INP | ND |
| 2020-08-28 | 420-179605-1-INP | ND |
| 2020-10-05 | AW19196-INP | ND |
| 2021-02-17 | AX03237-INP | ND |
| 2021-06-22 | 420-200400-1-INP | ND |
| 2021-06-22 | 420-200400-2-INP | ND |
| 2021-08-03 | AX15582-INP | ND |
| 2021-08-03 | AX15584-INP | ND |
| 2021-08-03 | AX15580-INP | ND |
| 2022-03-10 | AY04233-INP | ND |
| 2022-06-16 | 420-226818-2-INP | 7.00 ppb |
| 2022-06-16 | 420-226818-1-INP | 7.00 ppb |
| 2022-09-13 | AY16358-INP | ND |
| 2022-09-13 | AY16360-INP | ND |
| 2022-09-13 | AY16356-INP | ND |
| 2023-01-24 | AZ01477-INP | ND |
| 2023-05-10 | AZ08475-INP | ND |
| 2023-05-10 | AZ08476-INP | ND |
| 2023-08-16 | AZ15166-INP | ND |
| 2023-08-16 | AZ15162-INP | ND |
| 2023-08-16 | AZ15164-INP | ND |