1,2,4-Trichlorobenzene
Red Hill Water Authority
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 | 6 | 0 | ND |
| 2015 | ND | 5 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 9 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 6 | 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 |
|---|---|---|
| 2014-03-12 | 140010197 | ND |
| 2014-03-12 | 140010198 | ND |
| 2014-03-12 | 140010199 | ND |
| 2014-05-14 | 140020004 | ND |
| 2014-07-23 | 140032263 | ND |
| 2014-11-05 | 140050162 | ND |
| 2015-02-18 | 12402514 | ND |
| 2015-03-04 | 12516312 | ND |
| 2015-04-22 | 12633992 | ND |
| 2015-07-29 | 13013711 | ND |
| 2015-11-18 | 13515012 | ND |
| 2016-02-03 | 13871051 | ND |
| 2016-02-03 | 13871072 | ND |
| 2016-11-10 | 15227176 | ND |
| 2017-02-08 | 15656495 | ND |
| 2017-02-08 | 15656496 | ND |
| 2017-02-08 | 15656497 | ND |
| 2017-03-29 | 15796767 | ND |
| 2017-05-31 | 16095723 | ND |
| 2017-07-26 | 16414763 | ND |
| 2017-09-26 | 16727963 | ND |
| 2017-09-26 | 16727964 | ND |
| 2017-10-18 | 16881220 | ND |
| 2018-02-07 | 8001980-01 | ND |
| 2018-04-25 | 8008151-01 | ND |
| 2018-07-17 | 8017901-01 | ND |
| 2018-08-07 | 8021854-01 | ND |
| 2018-10-22 | 8028636-01 | ND |
| 2019-02-06 | 9002686-01 | ND |
| 2019-05-07 | 9009679-01 | ND |
| 2019-06-25 | 9022004-01 | ND |
| 2019-08-21 | 9025620-01 | ND |
| 2019-09-24 | 9021809-01 | ND |
| 2019-12-16 | 9033958-01 | ND |