Know Your Environment. Protect Your Health.

1,2,4-Trichlorobenzene

City of Lewiston

1,2,4-Trichlorobenzene is an industrial solvent that can harm the adrenal glands and may increase the risk of cancer.

 

24

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018ND40ND
2019ND40ND
2020ND60ND
2021ND50ND
2022ND30ND
2023ND20ND

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
2018-02-21V180221045-001ND
2018-02-22V180223004-001ND
2018-12-13V181213011-001ND
2018-12-13V181213011-002ND
2019-01-24V190124017-001ND
2019-04-23V190423067-001ND
2019-04-23V190423067-002ND
2019-08-14V190814075-003ND
2020-02-19V200219035-001ND
2020-07-28VMAG0811-07ND
2020-07-28VMAG0811-08ND
2020-07-28VMAG0811-05ND
2020-07-28VMAG0811-03ND
2020-07-28VMAG0811-01ND
2021-06-29VMBF0852-06ND
2021-06-29VMBF0852-03ND
2021-06-29VMBF0852-01ND
2021-06-29VMBG0852-04ND
2021-06-29VMBF0852-07ND
2022-06-28VMCF0954-01ND
2022-09-21VMCI0682-01ND
2022-11-21VMCK0693-01ND
2023-01-01VMDA0450-01ND
2023-08-02VMDH0130-01ND