1,2,4-Trichlorobenzene
Altoona Water Authority
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 | 6 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 6 | 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 |
|---|---|---|
| 2014-08-07 | 4H07065-01 | ND |
| 2014-08-07 | 4H07067-01 | ND |
| 2014-08-08 | 4H08030-01 | ND |
| 2014-08-08 | 4H08045-01 | ND |
| 2014-08-08 | 4H08031-01 | ND |
| 2014-08-08 | 4H08044-01 | ND |
| 2015-07-22 | 13058940 | ND |
| 2015-07-22 | 13058961 | ND |
| 2015-07-22 | 13058982 | ND |
| 2015-07-22 | 13059045 | ND |
| 2015-07-22 | 13059003 | ND |
| 2015-07-22 | 13059024 | ND |
| 2016-07-13 | 14631767 | ND |
| 2016-07-13 | 14631813 | ND |
| 2016-07-13 | 14631790 | ND |
| 2016-07-13 | 14631744 | ND |
| 2016-07-14 | 14632179 | ND |
| 2017-02-14 | 15705258 | ND |
| 2017-08-08 | 16624626 | ND |
| 2017-08-08 | 16624605 | ND |
| 2017-08-08 | 16624647 | ND |
| 2017-08-08 | 16624668 | ND |
| 2017-08-16 | 16624705 | ND |
| 2018-08-28 | 8H28047-01 | ND |
| 2018-08-28 | 8H28031-01 | ND |
| 2018-08-28 | 8H28032-01 | ND |
| 2018-08-28 | 8H28051-01 | ND |
| 2018-08-28 | 8H28044-01 | ND |
| 2018-08-28 | 8H28046-01 | ND |
| 2019-11-06 | 9K07058-03 | ND |
| 2019-11-06 | 9K07058-01 | ND |
| 2019-11-07 | 9K07074-01 | ND |
| 2019-11-07 | 9K07072-01 | ND |
| 2019-12-05 | 9L05126-01 | ND |