1,2,4-Trichlorobenzene
CTWC - Naugatuck Region-Central System
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | ND | 5 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 3 | 0 | ND |
| 2018 | ND | 4 | 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 |
|---|---|---|
| 2014-03-04 | BG14936VOC1 | ND |
| 2014-03-06 | BG16206VOC1 | ND |
| 2014-03-06 | BG16207VOC1 | ND |
| 2014-04-29 | BG38084VOC1 | ND |
| 2014-07-28 | BG82699VOC1 | ND |
| 2015-02-17 | BH74013VOC1 | ND |
| 2015-03-16 | BH83835VOC1 | ND |
| 2015-03-16 | BH83838VOC1 | ND |
| 2015-11-11 | BK21527VOC1 | ND |
| 2016-01-19 | BK54678VOC1 | ND |
| 2016-03-09 | BK76130VOC1 | ND |
| 2016-04-12 | BN12472VOC1 | ND |
| 2016-11-14 | BV85888VOC1 | ND |
| 2017-01-11 | BX19357VOC1 | ND |
| 2017-01-17 | BX30447VOC1 | ND |
| 2017-05-23 | BY28091VOC1 | ND |
| 2018-01-15 | BZ72858VOC1 | ND |
| 2018-02-13 | BZ88506VOC1 | ND |
| 2018-05-21 | CA50441VOC1 | ND |
| 2018-06-11 | CA67845VOC1 | ND |
| 2019-02-12 | VOC1 200521378 | ND |