Chromium (total)
Woodville Public 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 | N/A | 0 | 0 | N/A |
| 2019 | ND | 8 | 0 | ND |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | ND | 3 | 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 |
|---|---|---|
| 2019-01-10 | CA5410025_004_004-201901100945 | ND |
| 2019-01-10 | CA5410025_004_004-201901100955 | ND |
| 2019-01-10 | CA5410025_004_004-201901101010 | ND |
| 2019-01-10 | CA5410025_004_004-201901101040 | ND |
| 2019-01-10 | CA5410025_004_004-201901101140 | ND |
| 2019-01-10 | CA5410025_004_004-201901100940 | ND |
| 2019-08-27 | CA5410025_004_004-201908271230 | ND |
| 2019-08-27 | CA5410025_002_002-201908271214 | ND |
| 2022-01-04 | CA5410025_004_004-202201040900 | ND |
| 2022-03-08 | CA5410025_004_004-202203080805 | ND |
| 2022-11-16 | CA5410025_002_002-202211161045 | ND |