1,2,4-Trichlorobenzene
City of Show Low
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 | 3 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 12 | 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 |
|---|---|---|
| 2014-03-18 | 4031453-02 | ND |
| 2014-05-29 | 4052451-01V | ND |
| 2014-09-29 | 4092482-01V | ND |
| 2016-07-06 | 6070427-02 | ND |
| 2016-07-06 | 6070427-01 | ND |
| 2016-09-20 | 6091873-01 | ND |
| 2017-02-14 | 7021416-02 | ND |
| 2017-02-14 | 7021416-01V | ND |
| 2017-05-09 | 7051152-01VOC | ND |
| 2017-05-09 | 7051151-01VOC | ND |
| 2017-08-22 | 7082406-05 | ND |
| 2017-08-22 | 7082406-03VOC | ND |
| 2017-08-22 | 7082406-01VOC | ND |
| 2017-11-07 | 7110938-11 | ND |
| 2018-01-23 | 18A2482-02 | ND |
| 2018-01-23 | 18A2483-01 | ND |
| 2018-01-23 | 18A2482-01 | ND |
| 2018-01-23 | 18A2476-01VOC | ND |
| 2018-04-03 | 18D0522-01 VOC | ND |
| 2018-09-18 | 18I1881-01 VOC | ND |
| 2018-10-30 | 18J3236-01 VOC | ND |
| 2018-11-30 | 18L0575-01 | ND |
| 2018-11-30 | 18L0549-07 VOC | ND |
| 2018-12-03 | 18L0549-05 VOC | ND |
| 2018-12-03 | 18L0549-03 VOC | ND |
| 2018-12-03 | 18L0549-01 VOC | ND |
| 2019-03-05 | 19C0544-01 | ND |
| 2019-05-28 | 19E3013-03 | ND |
| 2019-07-16 | 19G2196-01 | ND |
| 2019-07-16 | 19G2196-04 | ND |
| 2019-07-16 | 19G2196-03 | ND |
| 2019-07-16 | 19G2196-02 | ND |