1,4-Dioxane
Jennie Clarkson Home
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 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | ND | 7 | 0 | ND |
| 2022 | ND | 8 | 0 | ND |
| 2023 | ND | 8 | 0 | ND |
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 |
|---|---|---|
| 2021-02-12 | L210710901-PFAS | ND |
| 2021-02-12 | L210710902-PFAS | ND |
| 2021-06-01 | L212915001-PFAS | ND |
| 2021-06-01 | L212915002-PFAS | ND |
| 2021-09-28 | L215269801-PFAS | ND |
| 2021-10-19 | L215729101-PFAS | ND |
| 2021-10-19 | L215729102-PFAS | ND |
| 2022-02-20 | L220912502-PFAS | ND |
| 2022-02-20 | L220912501-PFAS | ND |
| 2022-06-19 | L2232813-02-PFAS | ND |
| 2022-06-19 | L2232813-01-PFAS | ND |
| 2022-06-26 | L2234236-01-PFAS | ND |
| 2022-09-07 | L2248718-01-PFAS | ND |
| 2022-09-07 | L2248718-02-PFAS | ND |
| 2022-12-22 | L2272353-01-PFAS | ND |
| 2023-01-10 | L2301675-01-PFAS | ND |
| 2023-01-10 | L2301675-02-PFAS | ND |
| 2023-03-07 | L2312366-02-PFAS | ND |
| 2023-03-07 | L2312366-01-PFAS | ND |
| 2023-06-14 | L2335485-01-PFAS | ND |
| 2023-06-14 | L2335485-02-PFAS | ND |
| 2023-09-28 | L2358237-01-PFAS | ND |
| 2023-11-08 | CP44013-PFAS | ND |