1,4-Dioxane
Warminster Municipal Authority
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 | 0.133 ppb | 18 | 9 | ND - 1.40 ppb |
| 2014 | 0.103 ppb | 20 | 9 | ND - 1.20 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 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2013-11-19 | 1059680046 | ND |
| 2013-11-19 | 1059680019 | 0.170 ppb |
| 2013-11-19 | 1059680028 | 0.120 ppb |
| 2013-11-19 | 1059680022 | ND |
| 2013-11-19 | 1059680034 | 1.40 ppb |
| 2013-11-19 | 1059680037 | ND |
| 2013-11-19 | 1059680031 | ND |
| 2013-11-19 | 1059680025 | 0.130 ppb |
| 2013-11-19 | 1059680004 | 0.1000 ppb |
| 2013-11-19 | 1059680007 | 0.0780 ppb |
| 2013-11-19 | 1059680001 | ND |
| 2013-11-19 | 1059680040 | ND |
| 2013-11-19 | 1059680043 | 0.130 ppb |
| 2013-11-19 | 1059680013 | 0.0700 ppb |
| 2013-11-19 | 1059680052 | ND |
| 2013-11-19 | 1059680016 | ND |
| 2013-11-19 | 1059680049 | ND |
| 2013-11-19 | 1059680010 | 0.200 ppb |
| 2014-02-19 | 1072717001 | ND |
| 2014-05-20 | 2008319004 | 0.0810 ppb |
| 2014-05-20 | 2008319013 | 0.0810 ppb |
| 2014-05-20 | 2008319010 | 0.150 ppb |
| 2014-05-20 | 2008319049 | ND |
| 2014-05-20 | 2008319019 | 0.150 ppb |
| 2014-05-20 | 2008319016 | ND |
| 2014-05-20 | 2008319040 | ND |
| 2014-05-20 | 2008319001 | ND |
| 2014-05-20 | 2008319025 | 1.20 ppb |
| 2014-05-20 | 2008319007 | 0.0770 ppb |
| 2014-05-20 | 2008319046 | ND |
| 2014-05-20 | 2008319043 | ND |
| 2014-05-20 | 2008319034 | 0.0700 ppb |
| 2014-05-20 | 2008319031 | ND |
| 2014-05-20 | 2008319037 | ND |
| 2014-05-20 | 2008319028 | 0.0730 ppb |
| 2014-05-20 | 2008319022 | ND |
| 2014-06-09 | 2011601001 | 0.170 ppb |
| 2014-08-19 | 2024764001 | ND |