2,4-D
Aquarion Water Company of Connecticut - Valley System
NOTE: Aquarion Water Company of Connecticut - Valley System purchases water from Regional Water Authority which is required to test for 2,4-d. Sample information shown below was taken by Regional Water Authority.
2,4-D (2,4-dichlorophenoxyacetic acid) is a herbicide that can be applied directly to GMO corn and soy plants engineered to withstand this toxic chemical. Americans' exposures to 2,4-D from food and drinking water will likely increase in years to come as farmers plant more of these GMO crops. Read More.
2,4-D is an endocrine disruptor that interferes with thyroid hormones. The International Agency for Research on Cancer classifies 2,4-D as possibly carcinogenic to humans. In occupational studies, farmers exposed to 2,4-D tended to have higher incidences of damaged and malformed sperm. Laboratory animals exposed to 2,4-D during gestation are born underdeveloped and are more likely to have birth defects.
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 | 4 | 0 | ND |
| 2019 | ND | 6 | 0 | ND |
| 2020 | ND | 4 | 0 | ND |
| 2021 | ND | 4 | 0 | ND |
| 2022 | ND | 6 | 0 | ND |
| 2023 | ND | 4 | 0 | ND |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 20 ppb
The EWG Health Guideline of 20 ppb for 2,4-D 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 harm to internal organs.
EPA Maximum Contaminant
Level (MCL): 70 ppb
The legal limit for 2,4-D, established in 1991, was based on toxicity studies in laboratory animals conducted in the 1980s. This limit may not fully protect against harm to the nervous system, harm to the thyroid, and hormone disruption.
ppb = parts per billion
All test results
NOTE: Aquarion Water Company of Connecticut - Valley System purchases water from Regional Water Authority which is required to test for 2,4-d. Sample information shown below was taken by Regional Water Authority.
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-05 | SOCR 200489130 | ND |
| 2018-03-05 | SOCR 200489131 | ND |
| 2018-03-05 | SOCR 200489152 | ND |
| 2018-11-29 | SOCR 200514127 | ND |
| 2019-03-04 | SOCR 200523153 | ND |
| 2019-03-04 | SOCR 200523178 | ND |
| 2019-03-04 | SOCR 200523152 | ND |
| 2019-03-04 | SOCR 200523177 | ND |
| 2019-05-08 | SOC 200531300 | ND |
| 2019-05-28 | SOC 200533720 | ND |
| 2019-05-28 | SOC 200533719 | ND |
| 2019-05-28 | SOC 200533803 | ND |
| 2019-05-28 | SOC 200533804 | ND |
| 2019-05-28 | SOC 200533660 | ND |
| 2019-05-28 | SOC 200533659 | ND |
| 2019-05-29 | SOC 200533881 | ND |
| 2019-05-29 | SOC 200533880 | ND |
| 2019-05-29 | SOC 200533867 | ND |
| 2019-05-29 | SOC 200533868 | ND |
| 2019-08-26 | SOC 200546200 | ND |
| 2019-08-26 | SOC 200546197 | ND |
| 2019-08-26 | SOC 200546198 | ND |
| 2019-08-27 | SOC 200546267 | ND |
| 2019-08-27 | SOC 200546268 | ND |
| 2019-08-27 | SOC 200546302 | ND |
| 2019-08-27 | SOC 200546303 | ND |
| 2019-08-28 | SOC 200546738 | ND |
| 2019-08-28 | SOC 200546737 | ND |
| 2019-08-28 | SOC 200546736 | ND |
| 2019-08-28 | SOC 200546553 | ND |
| 2020-03-02 | SOCR 200567667 | ND |
| 2020-03-02 | SOCR 200567641 | ND |
| 2020-03-02 | SOCR 200567666 | ND |
| 2020-03-02 | SOCR 200567642 | ND |
| 2021-03-08 | SOCR 200608803 | ND |
| 2021-03-08 | SOCR 200608888 | ND |
| 2021-03-08 | SOCR 200608887 | ND |
| 2021-03-09 | SOCR 200608923 | ND |
| 2022-03-07 | H300153409 300153415 | ND |
| 2022-03-07 | H300153416 300153418 | ND |
| 2022-03-07 | H300153331 300153333 | ND |
| 2022-03-07 | H300153334 300153336 | ND |
| 2022-07-11 | S300210822 300210823 | ND |
| 2022-07-11 | S300210156 300210157 | ND |
| 2022-07-11 | S300210164 300210165 | ND |
| 2022-07-11 | S300210651 300210652 | ND |
| 2022-07-11 | S300210659 300210660 | ND |
| 2022-07-12 | S300211086 300211087 | ND |
| 2022-07-12 | S300211068 300211069 | ND |
| 2022-07-12 | S300211076 300211077 | ND |
| 2022-07-13 | S300212413 300212414 | ND |
| 2022-07-13 | S300212421 300212422 | ND |
| 2022-07-14 | S300212957 300212958 | ND |
| 2022-10-17 | S300258850 300258851 | ND |
| 2022-10-17 | 300258850 300258851B | ND |
| 2022-10-17 | 300258858 300258859B | ND |
| 2022-10-17 | S300258858 300258859 | ND |
| 2022-10-18 | S300258921 300258922 | ND |
| 2022-10-18 | 300258921 300258922B | ND |
| 2022-10-18 | 300259350 300259351B | ND |
| 2022-10-18 | 300259358 300259359B | ND |
| 2022-10-18 | S300259350 300259351 | ND |
| 2022-10-18 | 300258913 300258914B | ND |
| 2022-10-18 | S300258913 300258914 | ND |
| 2022-10-18 | S300259358 300259359 | ND |
| 2022-10-19 | S300260499 300260500 | ND |
| 2022-10-19 | S300260507 300260508 | ND |
| 2022-10-19 | 300260507 300260508B | ND |
| 2022-10-19 | 300260499 300260500B | ND |
| 2022-10-19 | S300259940 300259941 | ND |
| 2022-10-19 | 300259940 300259941B | ND |
| 2022-10-19 | 300259930 300259933B | ND |
| 2022-10-19 | S300259930 300259933 | ND |
| 2022-12-06 | S300281400 300281401 | ND |
| 2023-04-10 | H300330392 300330394 | ND |
| 2023-04-10 | H300329920 300329922 | ND |
| 2023-04-10 | H300330395 300330397 | ND |
| 2023-04-10 | H300329917 300329919 | ND |