Chromium (total)
Old Westbury
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 | 5 | 0 | ND |
| 2019 | ND | 5 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 6 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 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 |
|---|---|---|
| 2018-11-13 | 7070939001-PRI | ND |
| 2018-11-14 | 7071093001-PRI | ND |
| 2018-12-05 | 7072928001-PRI | ND |
| 2018-12-12 | 7073711001-PRI | ND |
| 2018-12-17 | 7074138001-PRI | ND |
| 2019-08-28 | 70103044002-PRI | ND |
| 2019-08-28 | 70103044001-PRI | ND |
| 2019-09-05 | 70103873001-PRI | ND |
| 2019-09-05 | 70103873002-PRI | ND |
| 2019-09-17 | 70105242001-PRI | ND |
| 2020-09-08 | 70144945001-PRI | ND |
| 2020-09-09 | 70145143001-PRI | ND |
| 2020-09-14 | 70145712001-PRI | ND |
| 2020-09-16 | 70146108001-PRI | ND |
| 2020-09-21 | 70146589001-PRI | ND |
| 2020-09-23 | 70146960001-PRI | ND |
| 2021-11-10 | 70194292002-PRI | ND |
| 2021-11-10 | 70194292001-PRI | ND |
| 2021-11-16 | 70194898002-PRI | ND |
| 2021-11-16 | 70194898001-PRI | ND |
| 2021-12-08 | 70197161001-PRI | ND |
| 2021-12-22 | 70198898001-PRI | ND |
| 2022-10-26 | 70234596001-PRI | ND |
| 2022-11-02 | 70235277001-PRI | ND |
| 2022-11-14 | 70236636001-PRI | ND |
| 2022-11-16 | 70237103001-PRI | ND |
| 2022-11-30 | 70238258001-PRI | ND |
| 2022-12-21 | 70240933001-PRI | ND |
| 2023-11-01 | 70276064002-PRI | ND |
| 2023-11-01 | 70276064001-PRI | ND |
| 2023-11-08 | 70276911002-PRI | ND |
| 2023-11-08 | 70276911001-PRI | ND |
| 2023-11-29 | 70279039001-PRI | ND |
| 2023-11-29 | 70279039002-PRI | ND |