1,2,4-Trichlorobenzene
Golden State Water Company - Los Osos
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 | 5 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
2016 | ND | 1 | 0 | ND |
2017 | ND | 10 | 0 | ND |
2018 | ND | 2 | 0 | ND |
2019 | ND | 1 | 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 |
---|---|---|
2014-01-02 | 2706-010-0810 | ND |
2014-01-02 | 2706-007-0835 | ND |
2014-01-02 | 2706-003-0915 | ND |
2014-01-02 | 2706-001-0745 | ND |
2014-07-02 | 2706-008-0850 | ND |
2016-05-11 | 2706-019-0718 | ND |
2017-02-21 | 9590-003-1010 | ND |
2017-02-21 | 9590-010-0825 | ND |
2017-02-21 | 9590-001-0842 | ND |
2017-07-12 | 9590-019-1010 | ND |
2017-07-18 | 9590-019-1000 | ND |
2017-09-26 | 9590-019-0830 | ND |
2017-10-30 | 9590-019-1405 | ND |
2017-11-02 | 9590-019-1550 | ND |
2017-12-12 | 9590-019-1015 | ND |
2017-12-12 | 9590-019-1035 | ND |
2018-02-13 | 9590-019-0840 | ND |
2018-03-13 | 9590-019-1015 | ND |
2019-01-14 | 9590-019-1500 | ND |