1,4-Dioxane
Allendale Water Department
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 |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.00900 ppb | 8 | 1 | ND - 0.0720 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.0373 ppb | 11 | 11 | 0.0210 ppb - 0.0590 ppb |
| 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 |
|---|---|---|
| 2021-02-04 | 70161862001-DOX | 0.0300 ppb |
| 2021-02-04 | 70161862002-DOX | 0.0510 ppb |
| 2021-02-19 | 70163568001-DOX | 0.0420 ppb |
| 2021-04-08 | 70169058001-DOX | 0.0210 ppb |
| 2021-04-08 | 70169058002-DOX | 0.0350 ppb |
| 2021-04-08 | 70169058003-DOX | 0.0350 ppb |
| 2021-07-15 | 70181541001-DOX | 0.0330 ppb |
| 2021-07-15 | 70181540001-DOX | 0.0360 ppb |
| 2021-07-27 | 70182311001-DOX | 0.0250 ppb |
| 2021-12-02 | 70196800001-DOX | 0.0430 ppb |
| 2021-12-21 | 70199040001-DOX | 0.0590 ppb |