Chromium (total)
Corporation Of Shepherdstown
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 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | 0.640 ppb | 1 | 1 | 0.640 ppb |
| 2022 | 0.980 ppb | 1 | 1 | 0.980 ppb |
| 2023 | 1.30 ppb | 1 | 1 | 1.30 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 |
|---|---|---|
| 2018-08-13 | 18082132-01A | ND |
| 2019-08-19 | 19082398-05A | ND |
| 2020-08-10 | 7338163004 | ND |
| 2021-08-09 | 7383528005 | 0.640 ppb |
| 2022-08-08 | 30512731005 | 0.980 ppb |
| 2023-08-07 | 30611535003 | 1.30 ppb |