1,2,4-Trichlorobenzene
Oro Valley Water Utility
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 | N/A | 0 | 0 | N/A |
| 2016 | ND | 16 | 0 | ND |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 2 | 0 | ND |
| 2019 | ND | 15 | 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 |
|---|---|---|
| 2014-02-28 | 14N0718-01(4V) | ND |
| 2016-01-04 | 160A0081-01(4V) | ND |
| 2016-01-05 | 16A0114-01(4V) | ND |
| 2016-01-12 | 16A0384-01(4V) | ND |
| 2016-01-13 | 16A04612-01(4V) | ND |
| 2016-01-14 | 16A0492-01(4V) | ND |
| 2016-01-14 | 16A0487-01(4V) | ND |
| 2016-01-19 | 16A0574-01(4V) | ND |
| 2016-01-19 | 16A0572-01(4V) | ND |
| 2016-01-19 | 16A0572-03(4V) | ND |
| 2016-01-20 | 16A0601-01(4V) | ND |
| 2016-01-20 | 16A0600-01(4V) | ND |
| 2016-01-21 | 16A0637-01(4V) | ND |
| 2016-01-21 | 16A0636-01(4V) | ND |
| 2016-01-25 | 16A0685-01(4V) | ND |
| 2016-01-26 | 16A0714-01(4V) | ND |
| 2016-02-01 | 16B0032-01(4V) | ND |
| 2018-02-13 | 18B0341-02(4V) | ND |
| 2018-02-13 | 18B0341-01(4V) | ND |
| 2019-01-14 | 19A0328-03(4V) | ND |
| 2019-01-14 | 19A0328-01(4V) | ND |
| 2019-01-15 | 19A0362-01(4V) | ND |
| 2019-01-15 | 19A0362-03(4V) | ND |
| 2019-01-15 | 19A0367-01(4V) | ND |
| 2019-01-15 | 19A0367-03(4V) | ND |
| 2019-01-16 | 19A0408-03(4V) | ND |
| 2019-01-16 | 19A0408-01(4V) | ND |
| 2019-01-16 | 19A0407-03(4V) | ND |
| 2019-01-16 | 19A0407-01(4V) | ND |
| 2019-01-17 | 19A0454-01(4V) | ND |
| 2019-01-17 | 19A0455-05(4V) | ND |
| 2019-01-17 | 19A0455-03(4V) | ND |
| 2019-01-17 | 19A0455-01(4V) | ND |
| 2019-01-17 | 19A0454-03(4V) | ND |