Chromium (total)
Tallula Utility District
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 | 0.800 ppb | 2 | 1 | ND - 1.60 ppb |
| 2021 | 1.98 ppb | 5 | 5 | 0.800 ppb - 3.80 ppb |
| 2022 | 0.500 ppb | 2 | 1 | ND - 1.000 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 |
|---|---|---|
| 2020-04-22 | 200423-020IN | 1.60 ppb |
| 2020-12-15 | IN-201216-001 | ND |
| 2021-02-23 | IN-210224-002 | 3.80 ppb |
| 2021-06-23 | IN-210624-004 | 1.70 ppb |
| 2021-09-15 | IN-210916-005 | 2.00 ppb |
| 2021-10-27 | IN-211029-003 | 1.60 ppb |
| 2021-10-27 | IN-211029-004 | 0.800 ppb |
| 2022-02-23 | IN-220224-012 | ND |
| 2022-04-27 | IN-220428-041 | 1.000 ppb |