Chromium (total)
Highfield
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 | 3 | 0 | ND |
| 2019 | 1.67 ppb | 3 | 1 | ND - 5.00 ppb |
| 2020 | ND | 1 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 5 | 0 | ND |
| 2023 | 2.03 ppb | 4 | 3 | ND - 3.20 ppb |
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 |
|---|---|---|
| 2018-03-23 | 1803160_01 | ND |
| 2018-03-23 | 1803160_01_A | ND |
| 2018-03-23 | 1803160_01_B | ND |
| 2019-05-14 | 1905078_01 | ND |
| 2019-05-14 | 1905078_02 | ND |
| 2019-05-14 | 1905078_03 | 5.00 ppb |
| 2020-03-18 | E20003203002 | ND |
| 2022-06-02 | 2206021_01 | ND |
| 2022-06-02 | 2206021_02 | ND |
| 2022-06-02 | 2206021_03 | ND |
| 2022-10-05 | E2300078002 | ND |
| 2022-10-05 | E2300078003 | ND |
| 2023-05-10 | 2305068-01 | 2.50 ppb |
| 2023-05-10 | 2305068-02 | 2.40 ppb |
| 2023-05-10 | 2305068-03 | 3.20 ppb |
| 2023-07-05 | E2300344501 | ND |