Chromium (total)
Gaslight Square Mobile Home Park
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 | 0.0833 ppb | 12 | 1 | ND - 1.000 ppb |
| 2019 | 2.25 ppb | 10 | 6 | ND - 6.00 ppb |
| 2020 | 2.47 ppb | 15 | 13 | ND - 5.40 ppb |
| 2021 | 0.842 ppb | 12 | 5 | ND - 4.20 ppb |
| 2022 | 4.01 ppb | 9 | 9 | 1.80 ppb - 7.60 ppb |
| 2023 | 1.94 ppb | 10 | 6 | ND - 6.10 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 |
|---|