Chromium (total)
Woden Water Supply Corporation
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 6 | 0 | ND |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | 0.550 ppb | 6 | 1 | ND - 3.30 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 |
|---|---|---|
| 2020-04-07 | Q2014004015 | ND |
| 2020-04-07 | Q2014004016 | ND |
| 2020-04-07 | Q2014004017 | ND |
| 2020-11-04 | Q2042876014 | ND |
| 2020-11-04 | Q2042876015 | ND |
| 2020-11-04 | Q2042876016 | ND |
| 2023-03-01 | Q2308261009 | 3.30 ppb |
| 2023-06-27 | Q2324601019 | ND |
| 2023-06-27 | Q2324601020 | ND |
| 2023-06-27 | Q2324601021 | ND |
| 2023-06-27 | Q2324601022 | ND |
| 2023-06-27 | Q2324601023 | ND |