1,4-Dioxane
Dover 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 0.00917 ppb | 24 | 1 | ND - 0.220 ppb |
2015 | ND | 4 | 0 | ND |
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 |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
---|---|---|
2014-03-25 | 201403270282AM | ND |
2014-03-25 | 201403270318AM | ND |
2014-03-25 | 201403270433AM | ND |
2014-03-25 | 201403270321AM | ND |
2014-03-25 | 201403270437AM | ND |
2014-03-26 | 201403270163AM | 0.220 ppb |
2014-03-26 | 201403270427AM | ND |
2014-03-26 | 201403270306AM | ND |
2014-03-26 | 201403270429AM | ND |
2014-03-26 | 201403270400AM | ND |
2014-03-26 | 201403270425AM | ND |
2014-03-26 | 201403270206AM | ND |
2014-03-31 | 201404010215AM | ND |
2014-09-16 | 201409170855AM | ND |
2014-09-16 | 201409180277AM | ND |
2014-09-17 | 201409180608AM | ND |
2014-09-17 | 201409180639AM | ND |
2014-09-17 | 201409180627AM | ND |
2014-09-17 | 201409190310AM | ND |
2014-09-17 | 201409190318AM | ND |
2014-09-22 | 201409230406AM | ND |
2014-09-22 | 201409230332AM | ND |
2014-09-22 | 201409230467AM | ND |
2014-09-24 | 201409250535AM | ND |
2015-01-14 | 201501150587AM | ND |
2015-01-14 | 201501150588AM | ND |
2015-01-14 | 201501150589AM | ND |
2015-03-12 | 201503140140AM | ND |