1,4-Dioxane
Hynes Estates Mutual Water Company
1,4-Dioxane is a solvent classified by the EPA as a likely human carcinogen. It contaminates groundwater in many states due to industrial wastewater discharges, plastic manufacturing runoff and landfill runoff. Read More.
Animal studies show that 1,4-dioxane can target the liver, kidneys and respiratory system, and that prenatal exposure can harm the developing fetus. The State of California has set a Public Heatlh Goal of no more than 1 part per billion of 1,4-dioxane in drinking water. The state of Massachusetts sets a legal limit of 0.3 ppb, and New Hampshire's limit is 3 parts per billion. There is no national drinking water standard for this contaminant.
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 | 1 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 5 | 0 | ND |
| 2021 | ND | 2 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.35 ppb
The EWG Health Guideline of 0.35 ppb for 1,4-dioxane was defined by the Environmental Protection Agency as a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-01-04 | CA3000519_001_001-201801040900 | ND |
| 2019-01-08 | CA3000519_001_001-201901081130 | ND |
| 2019-07-10 | CA3000519_005_005-201907101130 | ND |
| 2019-11-07 | CA3000519_005_005-201911071310 | ND |
| 2020-02-04 | CA3000519_001_001-202002041125 | ND |
| 2020-02-04 | CA3000519_005_005-202002041035 | ND |
| 2020-05-05 | CA3000519_005_005-202005051010 | ND |
| 2020-05-05 | CA3000519_001_001-202005051030 | ND |
| 2020-07-07 | CA3000519_005_005-202007071000 | ND |
| 2021-02-04 | CA3000519_001_001-202102041225 | ND |
| 2021-02-04 | CA3000519_005_005-202102041240 | ND |