Chromium (total)
Rochester
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 | 10 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | ND | 4 | 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 |
|---|---|---|
| 2018-06-19 | 18F1339-01 | ND |
| 2018-06-19 | 18F1339-02 | ND |
| 2018-06-19 | 18F1342-01 | ND |
| 2018-06-19 | 18F1342-02 | ND |
| 2018-06-19 | 18F1342-03 | ND |
| 2018-06-19 | 18F1342-04 | ND |
| 2018-06-19 | 18F1334-04 | ND |
| 2018-09-25 | 18I1335-01 | ND |
| 2018-09-25 | 18I1337-01 | ND |
| 2018-09-25 | 18I1341-03 | ND |
| 2019-06-24 | 19F1660-03 | ND |
| 2019-06-24 | 19F1660-08 | ND |
| 2019-06-24 | 19F1660-02 | ND |
| 2019-07-31 | 19H0196-01 | ND |
| 2020-06-18 | 20F1568-02 | ND |
| 2021-09-02 | 21I0224-01 | ND |
| 2021-09-02 | 21I0231-03 | ND |
| 2022-05-25 | 22E2069-01 | ND |
| 2022-08-03 | 22H0304-02 | ND |
| 2022-08-03 | 22H0337-02 | ND |
| 2022-11-08 | 22K0506-02 | ND |
| 2023-12-12 | 23L0480-09 | ND |
| 2023-12-12 | 23L0481-03 | ND |