1,2,3-Trichloropropane
CTWC - Unionville System
NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for 1,2,3-trichloropropane. Sample information shown below was taken by Metropolitan District Commission.
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.
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 | ND | 6 | 0 | ND |
| 2014 | ND | 6 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 2 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 5 | 0 | ND |
| 2022 | ND | 4 | 0 | ND |
| 2023 | ND | 1 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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
NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for 1,2,3-trichloropropane. Sample information shown below was taken by Metropolitan District Commission.
| Date | Lab ID | Result |
|---|---|---|
| 2013-07-17 | 201307180742AM | ND |
| 2013-07-17 | 201307180544AM | ND |
| 2013-07-17 | 201307180553AM | ND |
| 2013-10-09 | 201310100586AM | ND |
| 2013-10-09 | 201310100524AM | ND |
| 2013-10-09 | 201310100588AM | ND |
| 2014-01-07 | 201401080365AM | ND |
| 2014-01-07 | 201401080380AM | ND |
| 2014-01-07 | 201401080426AM | ND |
| 2014-04-08 | 201404090441AM | ND |
| 2014-04-08 | 201404090495AM | ND |
| 2014-04-08 | 201404090429AM | ND |
| 2018-07-16 | AE00927GE | ND |
| 2018-07-16 | AE00911GE | ND |
| 2018-07-16 | AE00912GE | ND |
| 2019-06-05 | AE29314GE | ND |
| 2019-06-05 | AE29313GE | ND |
| 2019-06-05 | AE29315GE | ND |
| 2020-06-02 | AE59301GE | ND |
| 2020-06-02 | AE59305GE | ND |
| 2020-06-02 | AE59302GE | ND |
| 2021-11-23 | V300107450 300107457 | ND |
| 2021-11-23 | V300107451 300107463 | ND |
| 2021-11-29 | V300109635 300109637 | ND |
| 2022-12-15 | V300287072 300287079 | ND |
| 2022-12-15 | V300287053 300287060 | ND |
| 2022-12-15 | V300287100 300287107 | ND |
| 2023-12-06 | V300456533 300456535 | ND |
| 2023-12-06 | V300456525 300456531 | ND |
| 2023-12-06 | V300456527 300456529 | ND |