Chromium (total)
Buena Vista Bethel Special 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 | ND | 2 | 0 | ND |
| 2019 | 4.83 ppb | 4 | 4 | 3.40 ppb - 6.00 ppb |
| 2020 | 0.550 ppb | 2 | 1 | ND - 1.10 ppb |
| 2021 | ND | 2 | 0 | ND |
| 2022 | 0.850 ppb | 4 | 3 | ND - 1.20 ppb |
| 2023 | ND | 2 | 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 |
|---|---|---|
| 2019-11-19 | Q1977641001 | 3.40 ppb |
| 2019-11-19 | Q1977641016 | 6.00 ppb |
| 2019-11-19 | Q1977641020 | 5.10 ppb |
| 2019-11-19 | Q1977641021 | 4.80 ppb |
| 2022-03-28 | Q2209624002 | ND |
| 2022-03-28 | Q2209624003 | 1.10 ppb |
| 2022-03-28 | Q2209624005 | 1.10 ppb |
| 2022-03-28 | Q2209624006 | 1.20 ppb |