1,2,4-Trichlorobenzene
Camrosa Water District
1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 1 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 5 ppb
The EWG Health Guideline of 5 ppb for 1,2,4-trichlorobenzene was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against hormone disruption.
EPA Maximum Contaminant
Level (MCL) 70 ppb
The legal limit for 1,2,4-trichlorobenzene, established in 1992, was based on a toxicity study in laboratory animals conducted in 1981. This limit may not fully protect against hormone disruption.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-06-25 | 5867-009-1005 | ND |
| 2016-01-12 | 5867-001-1027 | ND |
| 2016-01-12 | 5867-007-1002 | ND |
| 2016-01-20 | 5867-006-1002 | ND |
| 2016-04-19 | 5867-010-0937 | ND |
| 2016-07-11 | 5867-011-0924 | ND |
| 2017-03-27 | 5867-008-1410 | ND |
| 2017-07-13 | 5867-007-1400 | ND |
| 2017-07-13 | 5867-009-1510 | ND |
| 2017-07-13 | 5867-006-1416 | ND |
| 2017-07-13 | 5867-001-1428 | ND |
| 2018-07-17 | 5867-007-0910 | ND |
| 2018-07-17 | 5867-006-0910 | ND |
| 2018-07-17 | 5867-001-0910 | ND |
| 2019-08-21 | 5867-006-1021 | ND |
| 2019-08-21 | 5867-007-1258 | ND |
| 2019-08-21 | 5867-001-1148 | ND |
| 2019-08-21 | 5867-011-1002 | ND |