Chromium (total)
Town of Woodsboro
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 | 4 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 1 | 0 | ND |
| 2021 | 0.265 ppb | 4 | 1 | ND - 1.06 ppb |
| 2022 | ND | 3 | 0 | ND |
| 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 |
|---|---|---|
| 2018-03-14 | E18003348003 | ND |
| 2018-12-05 | 207_127_1_A | ND |
| 2018-12-05 | 207_148_2 | ND |
| 2018-12-05 | 207_148_3 | ND |
| 2020-09-28 | E21000870005 | ND |
| 2021-01-20 | 207_192_1_2_3 | 1.06 ppb |
| 2021-01-20 | 207_193_1 | ND |
| 2021-01-20 | 207_194_1_A | ND |
| 2021-06-30 | E22000007002 | ND |
| 2022-04-06 | E2201012502 | ND |
| 2022-04-06 | E2201012503 | ND |
| 2022-04-06 | E2201012701 | ND |