1,4-Dioxane
Arbor Hills Water Works
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 | ND | 10 | 0 | ND |
| 2021 | ND | 21 | 0 | ND |
| 2022 | 0.00225 ppb | 16 | 1 | ND - 0.0360 ppb |
| 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 |
|---|---|---|
| 2020-08-28 | L2045643-01-PFAS | ND |
| 2020-09-15 | L2038454-02-PFAS | ND |
| 2020-09-15 | L2038454-1-PFAS | ND |
| 2020-09-15 | L2038454-04-PFAS | ND |
| 2020-09-15 | L2038454-03-PFAS | ND |
| 2020-10-20 | L2045413-01-PFAS | ND |
| 2020-10-20 | L2045413-02-PFAS | ND |
| 2020-10-20 | L2045413-05-PFAS | ND |
| 2020-10-20 | L2045413-04-PFAS | ND |
| 2020-10-20 | L2045413-03-PFAS | ND |
| 2021-01-07 | L2100953-05-PFAS | ND |
| 2021-01-07 | L2100953-04-PFAS | ND |
| 2021-01-07 | L2100953-03-PFAS | ND |
| 2021-01-07 | L2100953-02-PFAS | ND |
| 2021-01-07 | L2100953-01-PFAS | ND |
| 2021-05-04 | L2123109-01-PFAS | ND |
| 2021-05-04 | L2123109-03-PFAS | ND |
| 2021-05-04 | L2123109-05-PFAS | ND |
| 2021-05-04 | L2123109-04-PFAS | ND |
| 2021-05-04 | L2123109-02-PFAS | ND |
| 2021-07-20 | L2318911-03-PFAS | ND |
| 2021-07-20 | L2138911-02-PFAS | ND |
| 2021-07-20 | L2138911-01-PFAS | ND |
| 2021-07-20 | L2138911-04-PFAS | ND |
| 2021-07-20 | L2138911-05-PFAS | ND |
| 2021-12-07 | L2167923-02-PFAS | ND |
| 2021-12-07 | L2167923-03-PFAS | ND |
| 2021-12-07 | L2167923-01-PFAS | ND |
| 2021-12-07 | L2167923-04-PFAS | ND |
| 2021-12-07 | L2167923-05-PFAS | ND |
| 2021-12-28 | L2171327-PFAS | ND |
| 2022-02-15 | L2209129-01-PFAS | ND |
| 2022-02-15 | L2209129-02-PFAS | ND |
| 2022-02-15 | L2209129-06-PFAS | ND |
| 2022-02-15 | L2209129-03-PFAS | ND |
| 2022-02-15 | L2209129-04-PFAS | ND |
| 2022-06-19 | L223281504-PFAS | ND |
| 2022-06-19 | L223281503-PFAS | ND |
| 2022-06-19 | L2232815-01-PFAS | ND |
| 2022-06-19 | L223281502-PFAS | ND |
| 2022-06-19 | L2232815-05-PFAS | ND |
| 2022-07-25 | 70223509001-PFAS | ND |
| 2022-07-25 | 70223509003-PFAS | 0.0360 ppb |
| 2022-07-25 | 70223509002-PFAS | ND |
| 2022-07-25 | 70223509004-PFAS | ND |
| 2022-09-23 | 70230584001-14DIOXAN | ND |
| 2022-09-23 | 70230584002-14DIOXAN | ND |