1,2,4-Trichlorobenzene
Mountain Water Company
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 | 5 | 0 | ND |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 10 | 0 | ND |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 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 | 1403-05022-005 | ND |
| 2014-03-18 | 1403-05022-001 | ND |
| 2014-03-19 | 1403-05022-003 | ND |
| 2014-10-02 | 1410-20649-005 | ND |
| 2014-11-25 | 1411-24526-009 | ND |
| 2015-04-09 | 1504-06449-001 | ND |
| 2015-08-24 | 1508-18271-007 | ND |
| 2016-02-18 | 1602-03331-003 | ND |
| 2016-02-18 | 1602-03331-001 | ND |
| 2016-06-20 | 1606-12947-001 | ND |
| 2016-09-01 | 1609-19693-007 | ND |
| 2016-09-28 | 1609-22363-011 | ND |
| 2016-11-17 | 1611-26538-011 | ND |
| 2017-01-19 | 1701-01535-005 | ND |
| 2017-01-19 | 1701-01535-011 | ND |
| 2017-01-19 | 1701-01535-001 | ND |
| 2017-03-22 | 1703-06014-003 | ND |
| 2017-06-13 | 1706-13198-001 | ND |
| 2017-06-13 | 1706-13198-011 | ND |
| 2017-08-10 | 1708-18628-007 | ND |
| 2017-09-19 | 1709-22340-011 | ND |
| 2017-11-16 | 1711-27703-011 | ND |
| 2017-11-16 | 1711-27703-009 | ND |
| 2018-02-11 | 1802-03658-001 | ND |
| 2018-08-29 | 1808-22103-007 | ND |
| 2018-11-29 | 1811-30493-011 | ND |
| 2019-01-17 | 1901-01511-001 | ND |
| 2019-03-21 | 1903-06283-003 | ND |
| 2019-10-17 | 1910-27353-005 | ND |