1,2,4-Trichlorobenzene
Palmer Center Ugarc
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 | 5 | 0 | ND |
| 2019 | ND | 4 | 0 | ND |
| 2020 | ND | 9 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 4 | 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 |
|---|---|---|
| 2018-01-10 | UG180098POC | ND |
| 2018-05-09 | PC180872 | ND |
| 2018-08-01 | 08011820POC | ND |
| 2018-08-13 | EHS1800035918POC | ND |
| 2018-10-09 | PC182388 | ND |
| 2019-01-07 | PC190059 | ND |
| 2019-04-24 | WD190998 | ND |
| 2019-07-17 | 07171903 | ND |
| 2019-10-14 | 10151907 | ND |
| 2020-01-06 | 01072016-POC | ND |
| 2020-04-22 | 04222018 | ND |
| 2020-05-12 | 05122005 | ND |
| 2020-06-01 | 06012004 | ND |
| 2020-07-01 | 07012020 | ND |
| 2020-07-20 | 07202003 | ND |
| 2020-08-11 | 08112028-1-RAW | ND |
| 2020-08-11 | 08112028-2-DS | ND |
| 2020-10-01 | 10012002-2 | ND |
| 2021-01-05 | 01052119-P | ND |
| 2021-01-25 | EHS2100013303P | ND |
| 2021-04-05 | 04052105N | ND |
| 2021-07-01 | 07012103 | ND |
| 2021-10-04 | 10042113 | ND |
| 2022-01-04 | 01042211 | ND |
| 2022-04-05 | 04052212 | ND |
| 2022-07-05 | 07052229 | ND |
| 2022-10-04 | 10042216-2 | ND |
| 2023-01-03 | 01032324-1 | ND |
| 2023-04-03 | 04032305 | ND |
| 2023-07-05 | PC232245 | ND |
| 2023-10-18 | 5530295 | ND |