Chromium (total)
Doney Park Water
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 | 2.13 ppb | 7 | 7 | 1.30 ppb - 2.60 ppb |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 2.60 ppb | 2 | 2 | 2.40 ppb - 2.80 ppb |
| 2022 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2018-04-17 | 201804180310I | 1.80 ppb |
| 2018-04-17 | 201804180311I | 2.50 ppb |
| 2018-04-17 | 201804180312I | 1.30 ppb |
| 2018-04-17 | 201804180313I | 2.50 ppb |
| 2018-04-17 | 201804180314I | 2.60 ppb |
| 2018-06-13 | 201806140290I | 2.00 ppb |
| 2018-08-28 | 201808290304I | 2.20 ppb |
| 2021-02-09 | 202102100078I | 2.80 ppb |
| 2021-02-09 | 202102100081I | 2.40 ppb |