1,2,4-Trichlorobenzene
Quarryville Borough
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 | 4 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 4 | 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 |
|---|---|---|
| 2014-01-09 | 1066488001 | ND |
| 2014-04-10 | 2001029001 | ND |
| 2014-07-10 | 2017224001 | ND |
| 2014-10-09 | 2033571001 | ND |
| 2015-02-19 | 12487572 | ND |
| 2015-04-09 | 12722188 | ND |
| 2015-07-09 | 13108345 | ND |
| 2015-10-08 | 13605092 | ND |
| 2016-01-07 | 13843223 | ND |
| 2016-04-07 | 14216717 | ND |
| 2016-07-14 | 14699922 | ND |
| 2016-10-06 | 15194351 | ND |
| 2017-01-09 | 15625145 | ND |
| 2017-04-06 | 16057663 | ND |
| 2017-08-10 | 16691232 | ND |
| 2017-10-06 | 16991866 | ND |
| 2017-11-09 | 17130614 | ND |
| 2018-01-11 | 7121162-01 | ND |
| 2018-04-09 | 8032882-01 | ND |
| 2018-07-10 | 8062555-01 | ND |
| 2018-10-11 | 8093465-01 | ND |
| 2019-01-10 | 8123550-01 | ND |
| 2019-04-11 | 9032840-01 | ND |
| 2019-07-09 | 9063178-01 | ND |
| 2019-10-10 | 9093307-01 | ND |