1,2,4-Trichlorobenzene
City of Santa Clara
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 | 8 | 0 | ND |
| 2016 | ND | 10 | 0 | ND |
| 2017 | ND | 5 | 0 | ND |
| 2018 | ND | 9 | 0 | ND |
| 2019 | ND | 9 | 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 |
|---|---|---|
| 2014-04-02 | 9590-030-1035 | ND |
| 2014-08-26 | 9590-034-0930 | ND |
| 2014-08-26 | 9590-027-1050 | ND |
| 2014-08-27 | 9590-036-1030 | ND |
| 2014-08-27 | 9590-011-0905 | ND |
| 2015-08-17 | 9590-019-1045 | ND |
| 2015-08-17 | 9590-004-0925 | ND |
| 2015-08-19 | 9590-002-0955 | ND |
| 2015-08-19 | 9590-015-1100 | ND |
| 2015-08-20 | 9590-031-1010 | ND |
| 2015-08-20 | 9590-007-1120 | ND |
| 2015-08-24 | 9590-013-0950 | ND |
| 2015-08-24 | 9590-014-1045 | ND |
| 2016-08-15 | 9590-010-1055 | ND |
| 2016-08-15 | 9590-016-1010 | ND |
| 2016-08-15 | 9590-018-0915 | ND |
| 2016-08-17 | 9590-025-0918 | ND |
| 2016-08-17 | 9590-029-1016 | ND |
| 2016-08-17 | 9590-005-1127 | ND |
| 2016-08-18 | 9590-008-0956 | ND |
| 2016-08-18 | 9590-023-0920 | ND |
| 2016-08-18 | 9590-012-1035 | ND |
| 2016-09-28 | 9590-026-0855 | ND |
| 2017-04-24 | 9590-030-1120 | ND |
| 2017-08-16 | 9590-011-0901 | ND |
| 2017-08-16 | 9590-027-1012 | ND |
| 2017-08-17 | 9590-036-1055 | ND |
| 2017-10-04 | 9590-034-1007 | ND |
| 2018-01-23 | 9590-022-1010 | ND |
| 2018-08-13 | 9590-004-0908 | ND |
| 2018-08-13 | 9590-026-1047 | ND |
| 2018-08-16 | 9590-031-0900 | ND |
| 2018-08-16 | 9590-002-1000 | ND |
| 2018-08-20 | 9590-019-1042 | ND |
| 2018-08-20 | 9590-014-0840 | ND |
| 2018-08-20 | 9590-013-1005 | ND |
| 2018-09-12 | 9590-007-1011 | ND |
| 2019-08-14 | 9590-022-0905 | ND |
| 2019-08-14 | 9590-030-1002 | ND |
| 2019-08-20 | 9590-023-1200 | ND |
| 2019-08-20 | 9590-018-1115 | ND |
| 2019-08-20 | 9590-008-0945 | ND |
| 2019-08-21 | 9590-029-0905 | ND |
| 2019-08-21 | 9590-016-1009 | ND |
| 2019-08-22 | 9590-010-0920 | ND |
| 2019-10-01 | 9590-012-1031 | ND |