1,2,3-Trichloropropane
Harris County Fresh Water Supply District 1a
1,2,3-Trichloropropane is a potent carcinogen that contaminates drinking water in agricultural regions where it was historically used as soil fumigant. Click here to read more about carcinogenic VOCs.
10
Samples
0
Samples exceeding legal limit (MCL)
1
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | ND | 2 | 0 | ND |
| 2016 | ND | 3 | 0 | ND |
| 2017 | ND | 2 | 0 | ND |
| 2018 | 0.395 ppb | 2 | 1 | ND - 0.790 ppb |
| 2019 | ND | 1 | 0 | ND |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.0007 ppb
The EWG Health Guideline of 0.0007 ppb for 1,2,3-trichloropropane 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 cancer.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2015-02-03 | AC79060 | ND |
| 2015-02-03 | AC79068 | ND |
| 2016-02-02 | AD21506 | ND |
| 2016-09-09 | AD48886 | ND |
| 2016-10-11 | AD52985 | ND |
| 2017-02-03 | AD68737 | ND |
| 2017-04-26 | AD81209 | ND |
| 2018-01-24 | AE10232 | ND |
| 2018-01-24 | AE10268 | 0.790 ppb |
| 2019-01-11 | AE49627 | ND |