1,2,4-Trichlorobenzene
Leeds Water Board
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 | 8 | 0 | ND |
| 2015 | ND | 6 | 0 | ND |
| 2016 | ND | 6 | 0 | ND |
| 2017 | ND | 8 | 0 | ND |
| 2018 | ND | 5 | 0 | ND |
| 2019 | ND | 11 | 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 |
|---|---|---|
| 2014-02-07 | 1402-00132-7 | ND |
| 2014-02-07 | 1402-00132-8 | ND |
| 2014-04-01 | 1404-00029-1 | ND |
| 2014-04-01 | 1404-00029-2 | ND |
| 2014-04-01 | 1404-00029-6 | ND |
| 2014-04-01 | 1404-00029-3 | ND |
| 2014-04-01 | 1404-00029-4 | ND |
| 2014-04-01 | 1404-00029-5 | ND |
| 2015-02-23 | 1502-00290-1 | ND |
| 2015-02-23 | 1502-00290-2 | ND |
| 2015-04-20 | 1504-00264-3 | ND |
| 2015-04-20 | 1504-00264-2 | ND |
| 2015-04-20 | 1504-00264-1 | ND |
| 2015-05-27 | 1505-00331-1 | ND |
| 2016-01-19 | 1601-00275-3 | ND |
| 2016-01-19 | 1601-00275-1 | ND |
| 2016-04-05 | 1604-00086-3 | ND |
| 2016-04-05 | 1604-00086-1 | ND |
| 2016-04-05 | 1604-00086-2 | ND |
| 2016-04-05 | 1604-00086-4 | ND |
| 2017-03-27 | 1703-00322-002 | ND |
| 2017-03-27 | 1703-00322-001 | ND |
| 2017-04-25 | 1704-00373-9 | ND |
| 2017-04-25 | 1704-00373-7 | ND |
| 2017-04-25 | 1704-00373-11 | ND |
| 2017-04-25 | 1704-00373-6 | ND |
| 2017-04-25 | 1704-00373-4 | ND |
| 2017-10-04 | 1710-00071-1V | ND |
| 2018-01-18 | 1801-00238-3 | ND |
| 2018-04-11 | 1804-00165-2 | ND |
| 2018-04-11 | 1804-00165-4 | ND |
| 2018-04-11 | 1804-00165-3 | ND |
| 2018-04-18 | 1804-00287-001 | ND |
| 2019-01-15 | 1901-00212-004 | ND |
| 2019-01-15 | 1901-00212-002 | ND |
| 2019-04-22 | 1904-00338-009 | ND |
| 2019-04-22 | 1904-00338-007 | ND |
| 2019-04-22 | 1904-00338-006 | ND |
| 2019-04-22 | 1904-00338-004 | ND |
| 2019-04-25 | 1904-00393-003 | ND |
| 2019-07-17 | 1907-00242-011 | ND |
| 2019-07-31 | 1907-00423-004 | ND |
| 2019-10-21 | 1910-00348-008 | ND |
| 2019-10-21 | 1910-00348-005 | ND |