Chromium (total)
Palm Ranch Irrigation 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 | ND | 1 | 0 | ND |
| 2019 | ND | 1 | 0 | ND |
| 2020 | ND | 1 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 1 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-04-03 | CA1910103_013_013-201804030803 | ND |
| 2019-11-07 | CA1910103_015_015-201911070900 | ND |
| 2020-06-16 | CA1910103_013_013-202006160617 | ND |
| 2021-09-28 | CA1910103_002_002-202109280710 | ND |
| 2021-09-28 | CA1910103_001_001-202109280728 | ND |
| 2021-09-28 | CA1910103_007_007-202109280804 | ND |
| 2021-11-02 | CA1910103_013_013-202111020709 | ND |
| 2022-10-04 | CA1910103_015_015-202210040701 | ND |
| 2023-01-17 | CA1910103_002_002-202301170728 | ND |
| 2023-01-17 | CA1910103_007_007-202301170653 | ND |
| 2023-01-17 | CA1910103_001_001-202301170719 | ND |
| 2023-01-17 | CA1910103_015_015-202301170705 | ND |