Chromium (total)
Cws - Tulco Water Company
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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 1 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 5 | 0 | ND |
| 2023 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2019-01-09 | CA5410041_004_004-201901090944 | ND |
| 2021-02-15 | CA5410041_004_004-202102150818 | ND |
| 2021-02-15 | CA5410041_009_009-202102150829 | ND |
| 2021-03-08 | CA5410041_009_009-202103080924 | ND |
| 2021-03-08 | CA5410041_004_004-202103080949 | ND |
| 2022-02-17 | CA5410041_004_004-202202171020 | ND |
| 2022-02-17 | CA5410041_009_009-202202171012 | ND |
| 2022-02-17 | CA5410041_004_004-202202170939 | ND |
| 2022-02-24 | CA5410041_004_004-202202240924 | ND |
| 2022-02-24 | CA5410041_009_009-202202240930 | ND |