Chromium (total)
Hillview Water Company-oakhurst/sierra Lakes
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 | 7 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 22 | 0 | ND |
| 2021 | ND | 12 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 15 | 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 |
|---|---|---|
| 2018-04-30 | CA2010007_046_046-201804301410 | ND |
| 2018-04-30 | CA2010007_047_047-201804301410 | ND |
| 2018-04-30 | CA2010007_048_048-201804301432 | ND |
| 2018-04-30 | CA2010007_024_024-201804301445 | ND |
| 2018-07-25 | CA2010007_010_010-201807251025 | ND |
| 2018-07-25 | CA2010007_009_009-201807251000 | ND |
| 2018-09-19 | CA2010007_001_001-201809190911 | ND |
| 2019-12-11 | CA2010007_041_041-201912110905 | ND |
| 2019-12-11 | CA2010007_039_039-201912110850 | ND |
| 2020-03-09 | CA2010007_031_031-202003090930 | ND |
| 2020-03-09 | CA2010007_030_030-202003090914 | ND |
| 2020-03-09 | CA2010007_033_033-202003091000 | ND |
| 2020-03-09 | CA2010007_032_032-202003090945 | ND |
| 2020-03-09 | CA2010007_017_017-202003091050 | ND |
| 2020-03-23 | CA2010007_034_034-202003231015 | ND |
| 2020-05-04 | CA2010007_002_002-202005041011 | ND |
| 2020-05-04 | CA2010007_028_028-202005041025 | ND |
| 2020-05-04 | CA2010007_003_003-202005041000 | ND |
| 2020-05-05 | CA2010007_007_007-202005050814 | ND |
| 2020-08-20 | CA2010007_002_002-202008201343 | ND |
| 2020-08-20 | CA2010007_003_003-202008201354 | ND |
| 2020-08-20 | CA2010007_034_034-202008201112 | ND |
| 2020-08-20 | CA2010007_041_041-202008201215 | ND |
| 2020-08-20 | CA2010007_028_028-202008201132 | ND |
| 2020-08-20 | CA2010007_030_030-202008201127 | ND |
| 2020-08-20 | CA2010007_039_039-202008201230 | ND |
| 2020-08-20 | CA2010007_017_017-202008200820 | ND |
| 2020-08-20 | CA2010007_032_032-202008201148 | ND |
| 2020-08-20 | CA2010007_033_033-202008201155 | ND |
| 2020-08-20 | CA2010007_031_031-202008201141 | ND |
| 2020-08-20 | CA2010007_007_007-202008201102 | ND |
| 2021-02-17 | CA2010007_040_040-202102171105 | ND |
| 2021-08-11 | CA2010007_048_048-202108110908 | ND |
| 2021-08-16 | CA2010007_001_001-202108160808 | ND |
| 2021-08-16 | CA2010007_024_024-202108160908 | ND |
| 2021-08-16 | CA2010007_010_010-202108160908 | ND |
| 2021-08-16 | CA2010007_009_009-202108160908 | ND |
| 2021-08-16 | CA2010007_047_047-202108160908 | ND |
| 2021-08-16 | CA2010007_046_046-202108160908 | ND |
| 2021-09-28 | CA2010007_051_051-202109280757 | ND |
| 2021-09-28 | CA2010007_048_048-202109280902 | ND |
| 2021-09-28 | CA2010007_014_014-202109280800 | ND |
| 2021-09-28 | CA2010007_047_047-202109280858 | ND |
| 2023-06-05 | CA2010007_034_034-202306051015 | ND |
| 2023-06-05 | CA2010007_007_007-202306050915 | ND |
| 2023-06-05 | CA2010007_041_041-202306051012 | ND |
| 2023-06-05 | CA2010007_033_033-202306050958 | ND |
| 2023-06-05 | CA2010007_032_032-202306050951 | ND |
| 2023-06-05 | CA2010007_031_031-202306050945 | ND |
| 2023-06-05 | CA2010007_040_040-202306051031 | ND |
| 2023-06-05 | CA2010007_039_039-202306051117 | ND |
| 2023-06-05 | CA2010007_030_030-202306050935 | ND |
| 2023-06-06 | CA2010007_051_051-202306060820 | ND |
| 2023-06-06 | CA2010007_003_003-202306060851 | ND |
| 2023-06-06 | CA2010007_017_017-202306060958 | ND |
| 2023-06-06 | CA2010007_013_013-202306061000 | ND |
| 2023-06-06 | CA2010007_028_028-202306061014 | ND |
| 2023-06-06 | CA2010007_002_002-202306060822 | ND |