1,2,4-Trichlorobenzene
Terra Bella Irrigation District - Tbt
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 |
|---|---|---|---|---|
| 2014 | ND | 2 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 2 | 0 | ND |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 4 | 0 | ND |
| 2019 | ND | 8 | 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 |
|---|---|---|
| 2014-05-07 | 5810-027-0930 | ND |
| 2014-05-19 | 5810-028-1150 | ND |
| 2016-02-05 | 5810-004-1150 | ND |
| 2016-08-25 | 5810-004-1220 | ND |
| 2017-09-06 | 5810-013-1230 | ND |
| 2017-09-06 | 5810-002-1205 | ND |
| 2017-09-06 | 5810-025-1315 | ND |
| 2017-09-06 | 5810-020-1155 | ND |
| 2017-09-06 | 5810-016-1149 | ND |
| 2017-09-06 | 5810-009-1215 | ND |
| 2017-09-06 | 5810-014-1251 | ND |
| 2017-09-07 | 5810-024-1120 | ND |
| 2018-09-24 | 5810-033-1510 | ND |
| 2018-09-24 | 5810-027-1445 | ND |
| 2018-12-27 | 5810-033-1230 | ND |
| 2018-12-27 | 5810-027-1250 | ND |
| 2019-02-26 | 5810-027-1318 | ND |
| 2019-02-26 | 5810-033-1300 | ND |
| 2019-05-10 | 5810-027-1310 | ND |
| 2019-05-10 | 5810-033-1328 | ND |
| 2019-08-29 | 5810-027-1340 | ND |
| 2019-08-29 | 5810-033-1328 | ND |
| 2019-11-21 | 5810-027-1338 | ND |
| 2019-11-21 | 5810-033-1315 | ND |