1,2,4-Trichlorobenzene
Lompoc Water Utility Division
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 | 8 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | ND | 7 | 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 |
|---|---|---|
| 2014-03-12 | 5867-011-1113 | ND |
| 2016-01-06 | 5867-003-1212 | ND |
| 2016-01-06 | 5867-007-1108 | ND |
| 2016-01-06 | 5867-011-1307 | ND |
| 2016-01-06 | 5867-016-1244 | ND |
| 2016-01-13 | 5867-008-1125 | ND |
| 2016-01-13 | 5867-009-1215 | ND |
| 2016-01-13 | 5867-013-1151 | ND |
| 2016-02-03 | 5867-006-1206 | ND |
| 2019-01-02 | 5867-006-1032 | ND |
| 2019-01-02 | 5867-008-1058 | ND |
| 2019-01-02 | 5867-016-0950 | ND |
| 2019-01-16 | 5867-011-0940 | ND |
| 2019-01-16 | 5867-013-0910 | ND |
| 2019-01-23 | 5867-007-0920 | ND |
| 2019-01-23 | 5867-009-1016 | ND |