1,2,4-Trichlorobenzene
City of Sansom Park
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 | 6 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
| 2020 | ND | 6 | 0 | ND |
| 2021 | ND | 8 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 6 | 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 |
|---|---|---|
| 2018-03-28 | Q1812846004 | ND |
| 2018-03-28 | Q1812846002 | ND |
| 2018-03-28 | Q1812846009 | ND |
| 2018-03-28 | Q1812846005 | ND |
| 2018-03-28 | Q1812846007 | ND |
| 2018-10-25 | Q1842722002 | ND |
| 2019-05-02 | Q1918146002 | ND |
| 2019-05-02 | Q1918146018 | ND |
| 2019-05-02 | Q1918146020 | ND |
| 2019-05-02 | Q1918146022 | ND |
| 2019-05-02 | Q1918146024 | ND |
| 2019-05-02 | Q1918146026 | ND |
| 2020-01-21 | Q2002279009 | ND |
| 2020-01-21 | Q2002279015 | ND |
| 2020-01-21 | Q2002279013 | ND |
| 2020-01-21 | Q2002279011 | ND |
| 2020-09-01 | Q2034833005 | ND |
| 2020-09-01 | Q2034833007 | ND |
| 2021-03-09 | Q2106121017 | ND |
| 2021-03-09 | Q2106121015 | ND |
| 2021-03-09 | Q2106121011 | ND |
| 2021-03-09 | Q2106121009 | ND |
| 2021-03-09 | Q2106121007 | ND |
| 2021-03-09 | Q2106121013 | ND |
| 2021-09-14 | Q2124999006 | ND |
| 2021-12-14 | Q2135515001 | ND |
| 2022-03-14 | Q2208529005 | ND |
| 2022-05-05 | Q2213616004 | ND |
| 2022-10-13 | Q2231074005 | ND |
| 2022-10-13 | Q2231074011 | ND |
| 2022-10-13 | Q2231074009 | ND |
| 2022-10-13 | Q2231074007 | ND |
| 2022-10-13 | Q2231074003 | ND |
| 2022-10-13 | Q2231074001 | ND |
| 2023-04-13 | Q2313713005 | ND |
| 2023-08-15 | Q2334087010 | ND |
| 2023-08-15 | Q2334087012 | ND |
| 2023-08-15 | Q2334087014 | ND |
| 2023-08-15 | Q2334087016 | ND |
| 2023-08-15 | Q2334087018 | ND |