1,2,4-Trichlorobenzene
Golden State Water Company (GSWC) - Florence/Graham
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 |
|---|---|---|---|---|
| 2014 | ND | 1 | 0 | ND |
| 2015 | ND | 1 | 0 | ND |
| 2016 | ND | 5 | 0 | ND |
| 2017 | ND | 6 | 0 | ND |
| 2018 | ND | 6 | 0 | ND |
| 2019 | ND | 4 | 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 |
|---|---|---|
| 2014-02-06 | 2706-010-1048 | ND |
| 2015-02-05 | 2706-010-1148 | ND |
| 2016-02-04 | 4790-010-1030 | ND |
| 2016-05-04 | 2706-027-0948 | ND |
| 2016-05-04 | 2706-036-0900 | ND |
| 2016-05-04 | 2706-034-1110 | ND |
| 2016-05-04 | 2706-033-1105 | ND |
| 2017-02-08 | 9590-010-1303 | ND |
| 2017-02-08 | 9590-027-1250 | ND |
| 2017-03-06 | 9590-033-0927 | ND |
| 2017-03-06 | 9590-034-0928 | ND |
| 2017-03-07 | 9590-027-1205 | ND |
| 2017-03-07 | 9590-036-1056 | ND |
| 2018-01-03 | 9590-036-1202 | ND |
| 2018-02-12 | 9590-010-0858 | ND |
| 2018-03-06 | 9590-033-1111 | ND |
| 2018-03-06 | 9590-036-1259 | ND |
| 2018-03-06 | 9590-034-1114 | ND |
| 2018-03-07 | 9590-027-1128 | ND |
| 2019-02-13 | 9590-033-1018 | ND |
| 2019-02-13 | 9590-034-1018 | ND |
| 2019-02-13 | 9590-027-1038 | ND |
| 2019-02-13 | 9590-010-1040 | ND |