Chromium (total)
Hillburn 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 | 4.24 ppb | 31 | 29 | ND - 11.7 ppb |
| 2019 | 4.52 ppb | 32 | 30 | ND - 24.3 ppb |
| 2020 | 3.35 ppb | 63 | 51 | ND - 14.2 ppb |
| 2021 | 1.12 ppb | 35 | 24 | ND - 7.36 ppb |
| 2022 | 1.16 ppb | 35 | 31 | ND - 2.58 ppb |
| 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 |
|---|