Chromium (total)
City of Ballinger
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 | 1 | 0 | ND |
| 2019 | 2.10 ppb | 1 | 1 | 2.10 ppb |
| 2020 | 1.60 ppb | 1 | 1 | 1.60 ppb |
| 2021 | ND | 1 | 0 | ND |
| 2022 | 1.90 ppb | 1 | 1 | 1.90 ppb |
| 2023 | ND | 1 | 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 |
|---|---|---|
| 2018-02-22 | Q1807533006 | ND |
| 2019-03-07 | Q1909830006 | 2.10 ppb |
| 2020-06-09 | Q2023140005 | 1.60 ppb |
| 2021-03-09 | Q2106093004 | ND |
| 2022-02-28 | Q2206742002 | 1.90 ppb |
| 2023-03-13 | Q2309647008 | ND |