Chromium (total)
Sun Valley Farms Unit Vi
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 | 6.25 ppb | 2 | 2 | 4.80 ppb - 7.70 ppb |
| 2019 | 5.20 ppb | 6 | 6 | 2.60 ppb - 11.0 ppb |
| 2020 | 1.38 ppb | 8 | 6 | ND - 2.60 ppb |
| 2021 | 3.80 ppb | 2 | 2 | 3.20 ppb - 4.40 ppb |
| 2022 | 2.28 ppb | 10 | 9 | ND - 4.60 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 |
|---|---|---|
| 2023-04-20 | 380-44514-1 | ND |