1,2,4-Trichlorobenzene
City of Boerne
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 | 3 | 0 | ND |
| 2015 | ND | 7 | 0 | ND |
| 2016 | ND | 7 | 0 | ND |
| 2017 | ND | 7 | 0 | ND |
| 2018 | ND | 7 | 0 | ND |
| 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 |
|---|---|---|
| 2014-02-11 | AC42222 | ND |
| 2014-04-03 | AC49258 | ND |
| 2014-07-14 | AC59510 | ND |
| 2015-01-29 | AC78533 | ND |
| 2015-04-13 | AC88003 | ND |
| 2015-04-13 | AC88007 | ND |
| 2015-07-23 | AD00763 | ND |
| 2015-07-23 | AD00749 | ND |
| 2015-07-23 | AD00779 | ND |
| 2015-07-23 | AD00753 | ND |
| 2016-02-17 | AD23965 | ND |
| 2016-04-20 | AD33644 | ND |
| 2016-04-20 | AD33646 | ND |
| 2016-07-22 | AD45474 | ND |
| 2016-11-02 | AD56150 | ND |
| 2016-11-02 | AD56140 | ND |
| 2016-11-02 | AD56138 | ND |
| 2017-01-25 | AD66830 | ND |
| 2017-01-25 | AD66826 | ND |
| 2017-04-04 | AD78313 | ND |
| 2017-04-04 | AD78327 | ND |
| 2017-04-04 | AD78315 | ND |
| 2017-07-17 | AD89534 | ND |
| 2017-07-17 | AD89532 | ND |
| 2018-01-29 | AE10984 | ND |
| 2018-01-29 | AE11034 | ND |
| 2018-05-01 | AE24587 | ND |
| 2018-05-01 | AE24581 | ND |
| 2018-05-01 | AE24583 | ND |
| 2018-05-01 | AE24585 | ND |
| 2018-08-14 | AE36941 | ND |
| 2019-09-17 | AE83853 | ND |
| 2019-10-02 | AE85514 | ND |
| 2019-10-02 | AE85524 | ND |
| 2019-10-02 | AE85516 | ND |
| 2019-10-02 | AE85526 | ND |
| 2019-10-02 | AE85522 | ND |
| 2019-10-02 | AE85520 | ND |