1,2,4-Trichlorobenzene
City of Laredo
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 | ND | 5 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 5 | 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 |
|---|---|---|
| 2014-08-22 | AC65086 | ND |
| 2015-09-15 | AD07131 | ND |
| 2015-11-17 | AD13862 | ND |
| 2015-11-18 | AD14073 | ND |
| 2015-11-18 | AD14069 | ND |
| 2015-12-14 | AD16823 | ND |
| 2016-02-16 | AD23653 | ND |
| 2016-06-20 | AD41389 | ND |
| 2016-07-21 | AD45249 | ND |
| 2016-07-21 | AD45263 | ND |
| 2016-07-21 | AD45241 | ND |
| 2017-02-21 | AD71288 | ND |
| 2017-09-05 | AD94761 | ND |
| 2017-09-05 | AD94763 | ND |
| 2017-09-05 | AD94765 | ND |
| 2017-12-05 | AE06800 | ND |
| 2018-07-16 | AE33575 | ND |
| 2018-07-16 | AE33571 | ND |
| 2018-10-16 | AE43638 | ND |
| 2018-10-16 | AE43642 | ND |
| 2018-10-16 | AE43640 | ND |
| 2019-03-11 | AE57867 | ND |
| 2019-06-06 | AE69489 | ND |
| 2019-08-20 | AE79960 | ND |
| 2019-08-20 | AE79958 | ND |
| 2019-08-20 | AE79956 | ND |