Chromium (total)
Davidson Water Inc.
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 | ND | 1 | 0 | ND |
2022 | ND | 1 | 0 | ND |
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 |
---|---|---|
2018-03-13 | 37729_18-09751 | ND |
2019-05-08 | 37729_19-18823 | ND |
2020-01-22 | 37729_20-03227 | ND |
2021-05-04 | 37729_21-18140 | ND |
2022-09-13 | 37729_22-44331 | ND |
2023-05-04 | 37729_23-22800 | ND |