1,2,4-Trichlorobenzene
North Penn 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 |
|---|---|---|---|---|
| 2018 | ND | 48 | 0 | ND |
| 2019 | ND | 45 | 0 | ND |
| 2020 | ND | 49 | 0 | ND |
| 2021 | ND | 38 | 0 | ND |
| 2022 | ND | 26 | 0 | ND |
| 2023 | ND | 18 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-01-22 | 20180293 | ND |
| 2018-01-22 | 20180294 | ND |
| 2018-01-22 | 20180295 | ND |
| 2018-01-22 | 20180296 | ND |
| 2018-02-05 | 20180455 | ND |
| 2018-02-05 | 20180456 | ND |
| 2018-02-05 | 20180452 | ND |
| 2018-02-05 | 20180453 | ND |
| 2018-02-05 | 20180454 | ND |
| 2018-02-05 | 20180457 | ND |
| 2018-03-20 | 20181073 | ND |
| 2018-03-20 | 20181074 | ND |
| 2018-03-20 | 20181075 | ND |
| 2018-03-20 | 20181076 | ND |
| 2018-04-16 | 20181445 | ND |
| 2018-04-16 | 20181446 | ND |
| 2018-04-16 | 20181448 | ND |
| 2018-04-16 | 20181447 | ND |
| 2018-05-02 | 20181740 | ND |
| 2018-05-02 | 20181741 | ND |
| 2018-05-02 | 20181744 | ND |
| 2018-05-02 | 20181742 | ND |
| 2018-05-02 | 20181743 | ND |
| 2018-06-18 | 20182322 | ND |
| 2018-06-18 | 20182324 | ND |
| 2018-06-18 | 20182325 | ND |
| 2018-06-18 | 20182323 | ND |
| 2018-06-18 | 20182326 | ND |
| 2018-06-18 | 20182327 | ND |
| 2018-07-16 | 20182699 | ND |
| 2018-07-16 | 20182700 | ND |
| 2018-07-16 | 20182701 | ND |
| 2018-08-01 | 20182922 | ND |
| 2018-08-01 | 20182923 | ND |
| 2018-08-01 | 20182920 | ND |
| 2018-08-01 | 20182921 | ND |
| 2018-08-01 | 20182924 | ND |
| 2018-09-05 | 20183429 | ND |
| 2018-09-05 | 20183431 | ND |
| 2018-09-05 | 20183430 | ND |
| 2018-09-05 | 20183432 | ND |
| 2018-10-15 | 20183924 | ND |
| 2018-10-15 | 20183926 | ND |
| 2018-10-15 | 20183925 | ND |
| 2018-12-03 | 8121626-01 | ND |
| 2018-12-03 | 8121626-03 | ND |
| 2018-12-03 | 8121626-02 | ND |
| 2018-12-10 | 8122542-01 | ND |
| 2019-01-21 | 20190220 | ND |
| 2019-02-04 | 20190410 | ND |
| 2019-02-04 | 20190411 | ND |
| 2019-02-04 | 20190409 | ND |
| 2019-02-04 | 20190412 | ND |
| 2019-02-07 | 20190528 | ND |
| 2019-03-04 | 20190828 | ND |
| 2019-03-04 | 20190829 | ND |
| 2019-03-04 | 20190830 | ND |
| 2019-04-17 | 20191516 | ND |
| 2019-04-17 | 20191518 | ND |
| 2019-04-17 | 20191517 | ND |
| 2019-05-02 | 20191674 | ND |
| 2019-05-02 | 20191675 | ND |
| 2019-05-02 | 20191678 | ND |
| 2019-05-02 | 20191676 | ND |
| 2019-05-02 | 20191677 | ND |
| 2019-07-15 | 20192723 | ND |
| 2019-07-15 | 20192724 | ND |
| 2019-07-15 | 20192727 | ND |
| 2019-07-15 | 20192728 | ND |
| 2019-07-15 | 20192725 | ND |
| 2019-07-15 | 20192726 | ND |
| 2019-08-05 | 20192977 | ND |
| 2019-08-05 | 20192978 | ND |
| 2019-08-05 | 20192976 | ND |
| 2019-08-05 | 20192979 | ND |
| 2019-09-04 | 20193493 | ND |
| 2019-09-04 | 20193494 | ND |
| 2019-09-04 | 20193495 | ND |
| 2019-09-04 | 20193496 | ND |
| 2019-10-21 | 20194146 | ND |
| 2019-10-21 | 20194147 | ND |
| 2019-10-21 | 20194148 | ND |
| 2019-11-04 | 20194264 | ND |
| 2019-11-04 | 20194265 | ND |
| 2019-11-04 | 20194267 | ND |
| 2019-11-04 | 20194266 | ND |
| 2019-11-04 | 20194268 | ND |
| 2019-11-04 | 20194269 | ND |
| 2019-12-02 | 20194693 | ND |
| 2019-12-02 | 20194694 | ND |
| 2019-12-02 | 20194696 | ND |
| 2019-12-02 | 20194697 | ND |
| 2019-12-02 | 20194695 | ND |
| 2020-01-20 | 21503051.00 | ND |
| 2020-01-20 | 21503072.00 | ND |
| 2020-01-20 | 21502988.00 | ND |
| 2020-01-20 | 21503009.00 | ND |
| 2020-01-20 | 21503030.00 | ND |
| 2020-02-03 | 21667075.00 | ND |
| 2020-02-03 | 21667096.00 | ND |
| 2020-02-03 | 21667117.00 | ND |
| 2020-03-02 | 21847012.00 | ND |
| 2020-03-02 | 21847033.00 | ND |
| 2020-03-02 | 21847054.00 | ND |
| 2020-03-02 | 21847075.00 | ND |
| 2020-05-05 | 22215265.00 | ND |
| 2020-05-05 | 22215286.00 | ND |
| 2020-05-05 | 22215328.00 | ND |
| 2020-05-05 | 22215349.00 | ND |
| 2020-05-05 | 22215307.00 | ND |
| 2020-06-01 | 22416276.00 | ND |
| 2020-06-01 | 22416297.00 | ND |
| 2020-06-01 | 22416339.00 | ND |
| 2020-06-01 | 22416360.00 | ND |
| 2020-06-01 | 22416318.00 | ND |
| 2020-06-01 | 22416381.00 | ND |
| 2020-07-20 | 22607569.00 | ND |
| 2020-07-20 | 22607590.00 | ND |
| 2020-07-20 | 22607506.00 | ND |
| 2020-07-20 | 22607527.00 | ND |
| 2020-07-20 | 22607548.00 | ND |
| 2020-08-03 | 22608146.00 | ND |
| 2020-08-03 | 22608167.00 | ND |
| 2020-08-03 | 22608188.00 | ND |
| 2020-08-03 | 22608209.00 | ND |
| 2020-09-02 | 22999410.00 | ND |
| 2020-09-02 | 22999431.00 | ND |
| 2020-09-02 | 22999473.00 | ND |
| 2020-09-02 | 22999494.00 | ND |
| 2020-09-02 | 22999452.00 | ND |
| 2020-09-02 | 22999515.00 | ND |
| 2020-10-19 | 23183093.00 | ND |
| 2020-10-19 | 23183114.00 | ND |
| 2020-10-19 | 23183135.00 | ND |
| 2020-11-02 | 23362132.00 | ND |
| 2020-11-02 | 23362153.00 | ND |
| 2020-11-02 | 23362174.00 | ND |
| 2020-11-02 | 23362195.00 | ND |
| 2020-12-02 | 23537594.00 | ND |
| 2020-12-02 | 23537615.00 | ND |
| 2020-12-02 | 23537636.00 | ND |
| 2020-12-02 | 23537657.00 | ND |
| 2021-01-18 | 23712791.00 | ND |
| 2021-01-18 | 23712812.00 | ND |
| 2021-01-18 | 23712770.00 | ND |
| 2021-02-05 | 23888806.00 | ND |
| 2021-02-05 | 23888848.00 | ND |
| 2021-02-05 | 23888827.00 | ND |
| 2021-03-01 | 24060124.00 | ND |
| 2021-03-01 | 24060145.00 | ND |
| 2021-03-01 | 24060166.00 | ND |
| 2021-03-09 | 24060103.00 | ND |
| 2021-04-19 | 24247764.00 | ND |
| 2021-04-19 | 24247785.00 | ND |
| 2021-05-17 | 24438757.00 | ND |
| 2021-05-17 | 24438778.00 | ND |
| 2021-05-17 | 24438799.00 | ND |
| 2021-06-02 | 24638228.00 | ND |
| 2021-06-02 | 24638249.00 | ND |
| 2021-06-02 | 24638270.00 | ND |
| 2021-06-02 | 24638291.00 | ND |
| 2021-07-21 | 24829600.00 | ND |
| 2021-07-21 | 24829621.00 | ND |
| 2021-07-21 | 24829538.00 | ND |
| 2021-07-21 | 24829559.00 | ND |
| 2021-07-21 | 24829642.00 | ND |
| 2021-08-03 | 24829643.00 | ND |
| 2021-08-03 | 24829664.00 | ND |
| 2021-08-03 | 24829685.00 | ND |
| 2021-08-03 | 24829727.00 | ND |
| 2021-08-03 | 24829706.00 | ND |
| 2021-09-08 | 25220377.00 | ND |
| 2021-09-08 | 25220398.00 | ND |
| 2021-09-08 | 25220419.00 | ND |
| 2021-10-18 | 25405344.00 | ND |
| 2021-10-19 | 25405323.00 | ND |
| 2021-10-19 | 25405365.00 | ND |
| 2021-10-19 | 25405386.00 | ND |
| 2021-11-01 | 25588154.00 | ND |
| 2021-12-06 | 25764720.00 | ND |
| 2022-01-17 | 25942740.00 | ND |
| 2022-01-17 | 25942761.00 | ND |
| 2022-01-17 | 25942719.00 | ND |
| 2022-01-17 | 25942782.00 | ND |
| 2022-02-09 | 26117631.00 | ND |
| 2022-02-09 | 26117652.00 | ND |
| 2022-02-09 | 26117673.00 | ND |
| 2022-02-09 | 26117694.00 | ND |
| 2022-03-02 | 26287443.00 | ND |
| 2022-05-04 | 26648495.00 | ND |
| 2022-05-04 | 26648516.00 | ND |
| 2022-05-04 | 26648537.00 | ND |
| 2022-05-16 | 26649181.00 | ND |
| 2022-05-16 | 26649202.00 | ND |
| 2022-05-16 | 26649223.00 | ND |
| 2022-06-06 | 26842856.00 | ND |
| 2022-07-20 | 27037765.00 | ND |
| 2022-08-03 | 27234056.00 | ND |
| 2022-08-03 | 27234077.00 | ND |
| 2022-08-03 | 27234035.00 | ND |
| 2022-08-03 | 27234098.00 | ND |
| 2022-10-17 | 27641615.00 | ND |
| 2022-10-17 | 27641636.00 | ND |
| 2022-10-17 | 27641657.00 | ND |
| 2022-11-02 | 27823005.00 | ND |
| 2022-12-05 | 27998842.00 | ND |
| 2023-01-18 | 28172953.00 | ND |
| 2023-01-18 | 28172974.00 | ND |
| 2023-01-18 | 28172932.00 | ND |
| 2023-01-19 | 28172995.00 | ND |
| 2023-02-02 | 28349537.00 | ND |
| 2023-03-06 | 28521259.00 | ND |
| 2023-03-06 | 28521280.00 | ND |
| 2023-04-12 | 28702324.00 | ND |
| 2023-06-21 | 29108535.00 | ND |
| 2023-07-19 | 29302128.00 | ND |
| 2023-07-19 | 29302149.00 | ND |
| 2023-07-19 | 29302107.00 | ND |
| 2023-08-02 | 29497554.00 | ND |
| 2023-09-13 | 29700116.00 | ND |
| 2023-09-13 | 29700137.00 | ND |
| 2023-10-12 | 29886769.00 | ND |
| 2023-11-01 | 30071588.00 | ND |
| 2023-12-04 | 30245958.00 | ND |