1,2,4-Trichlorobenzene
City of Flagstaff
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 | 2 | 0 | ND |
| 2015 | ND | 8 | 0 | ND |
| 2016 | ND | 2 | 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 |
|---|---|---|
| 2014-08-27 | 201408300317V | ND |
| 2014-10-06 | 201410070846V | ND |
| 2015-04-14 | 201504150294V | ND |
| 2015-07-22 | 201507180334V | ND |
| 2015-07-22 | 201507160337V | ND |
| 2015-07-30 | 201507310184V | ND |
| 2015-08-27 | 201508280194V | ND |
| 2015-09-10 | 201509120269V | ND |
| 2015-10-20 | 201510210462V | ND |
| 2015-10-20 | 201510070069V | ND |
| 2016-02-17 | 201602180536V | ND |
| 2016-02-17 | 201602180535V | ND |
| 2017-03-07 | 201703080657V | ND |
| 2017-03-07 | 201703080656V | ND |
| 2017-03-07 | 201703080655V | ND |
| 2017-03-07 | 201703080654V | ND |
| 2017-09-11 | 201709121557V | ND |
| 2018-05-15 | 201805160793 V | ND |
| 2018-05-15 | 201805160792 V | ND |
| 2018-05-15 | 201805160791 V | ND |
| 2018-06-11 | 201806120451V | ND |
| 2018-06-13 | 201806140903V | ND |
| 2018-06-13 | 201806140902V | ND |
| 2018-08-27 | 201808281001V | ND |
| 2018-08-27 | 201808281002V | ND |
| 2018-08-27 | 201808281003V | ND |
| 2019-04-29 | 201904300311V | ND |
| 2019-04-29 | 201904300310V | ND |
| 2019-06-18 | 201906190260V | ND |
| 2019-06-18 | 201906190259V | ND |
| 2019-07-22 | 201907230337V | ND |
| 2019-07-22 | 201907230199V | ND |
| 2019-09-25 | 201909260285V | ND |
| 2019-09-25 | 201909260284V | ND |
| 2019-10-23 | 201910240268V | ND |