Chromium (total)
Woodlake, City Of
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 | 5 | 0 | ND |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2018-09-20 | CA5410020_006_006-201809201220 | ND |
| 2018-09-20 | CA5410020_004_004-201809201250 | ND |
| 2018-09-20 | CA5410020_005_005-201809201240 | ND |
| 2018-09-20 | CA5410020_007_007-201809201230 | ND |
| 2018-09-20 | CA5410020_008_008-201809201210 | ND |
| 2020-09-15 | CA5410020_010_010-202009151144 | ND |
| 2020-09-15 | CA5410020_009_009-202009151138 | ND |
| 2020-11-19 | CA5410020_010_010-202011191140 | ND |
| 2021-08-31 | CA5410020_004_004-202108311030 | ND |
| 2021-08-31 | CA5410020_006_006-202108311045 | ND |
| 2021-08-31 | CA5410020_005_005-202108311010 | ND |
| 2021-08-31 | CA5410020_008_008-202108311109 | ND |
| 2021-08-31 | CA5410020_007_007-202108311055 | ND |
| 2023-08-15 | CA5410020_009_009-202308151110 | ND |
| 2023-08-15 | CA5410020_010_010-202308151100 | ND |