Chromium (total)
City of Sansom Park
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 | 0.583 ppb | 6 | 3 | ND - 1.30 ppb |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 1 | 0 | ND |
| 2022 | 6.42 ppb | 6 | 5 | ND - 8.50 ppb |
| 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 |
|---|---|---|
| 2019-05-02 | Q1918146004 | 1.10 ppb |
| 2019-05-02 | Q1918146005 | 1.10 ppb |
| 2019-05-02 | Q1918146006 | ND |
| 2019-05-02 | Q1918146007 | ND |
| 2019-05-02 | Q1918146008 | ND |
| 2019-05-02 | Q1918146009 | 1.30 ppb |
| 2021-09-14 | Q2124999008 | ND |
| 2022-10-13 | Q2231074013 | 8.00 ppb |
| 2022-10-13 | Q2231074014 | 7.70 ppb |
| 2022-10-13 | Q2231074015 | 7.60 ppb |
| 2022-10-13 | Q2231074024 | ND |
| 2022-10-13 | Q2231074025 | 8.50 ppb |
| 2022-10-13 | Q2231074026 | 6.70 ppb |