1,2,4-Trichlorobenzene
Idyllwild Water District
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 | 8 | 0 | ND |
2015 | ND | 1 | 0 | ND |
2016 | N/A | 0 | 0 | N/A |
2017 | ND | 1 | 0 | ND |
2018 | ND | 1 | 0 | ND |
2019 | ND | 12 | 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 |
---|---|---|
2014-07-17 | 4790-019-0815 | ND |
2014-07-17 | 4790-018-0810 | ND |
2014-08-27 | 4790-020-1000 | ND |
2014-08-27 | 4790-004-1055 | ND |
2014-09-03 | 4790-017-0900 | ND |
2014-09-24 | 4790-029-1110 | ND |
2014-09-24 | 4790-028-1100 | ND |
2014-09-24 | 4790-002-1130 | ND |
2015-04-16 | 4790-021-0730 | ND |
2017-07-24 | 4790-032-1100 | ND |
2018-05-23 | 4790-046-0900 | ND |
2019-04-25 | 4790-024-1008 | ND |
2019-04-25 | 4790-001-1020 | ND |
2019-04-25 | 4790-010-0920 | ND |
2019-04-25 | 4790-005-0900 | ND |
2019-05-03 | 4790-021-0915 | ND |
2019-05-03 | 4790-016-0950 | ND |
2019-05-03 | 4790-011-0940 | ND |
2019-05-03 | 4790-005-1040 | ND |
2019-05-23 | 4790-011-1035 | ND |
2019-06-27 | 4790-002-1100 | ND |
2019-07-18 | 4790-041-0910 | ND |
2019-08-07 | 4790-032-0900 | ND |