Dalapon
CTWC - Unionville System
NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for dalapon. Sample information shown below was taken by Metropolitan District Commission.
The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | ND | 7 | 0 | ND |
| 2019 | ND | 12 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 3 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 3 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EPA Maximum Contaminant
Level (MCL): 200 ppb
The legal limit for dalapon, established in 1992, was based on a toxicity study in laboratory animals published in 1960.
ppb = parts per billion
All test results
NOTE: CTWC - Unionville System purchases water from Metropolitan District Commission which is required to test for dalapon. Sample information shown below was taken by Metropolitan District Commission.
| Date | Lab ID | Result |
|---|---|---|
| 2018-06-27 | CA79476 | ND |
| 2018-06-27 | CA79477 | ND |
| 2018-06-27 | CA79475 | ND |
| 2018-09-25 | CB38504 | ND |
| 2018-09-25 | CB38505R | ND |
| 2018-09-25 | CB38869 | ND |
| 2018-09-25 | CB38505 | ND |
| 2020-12-08 | SOC 200600638 | ND |
| 2020-12-08 | SOC 200600609 | ND |
| 2020-12-09 | SOC 200600592 | ND |
| 2021-11-23 | S300107511 300107512 | ND |
| 2021-11-23 | S300107593 300107595 | ND |
| 2021-11-29 | S300109627 300109628 | ND |
| 2022-12-15 | S300287039 300287043 | ND |
| 2022-12-15 | S300287062 300287064 | ND |
| 2022-12-15 | S300287090 300287092 | ND |
| 2023-12-05 | S300456329 300456331 | ND |
| 2023-12-06 | S300456308 300456310 | ND |
| 2023-12-06 | S300456298 300456300 | ND |