1,4-Dioxane
Wauconda
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 |
---|---|---|---|---|
2013 | 0.392 ppb | 12 | 6 | ND - 1.94 ppb |
2014 | N/A | 0 | 0 | N/A |
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 | 4.00 ppb | 2 | 2 | 3.90 ppb - 4.10 ppb |
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 |
---|---|---|
2013-05-13 | 719236-8941 | 0.270 ppb |
2013-05-13 | 719238-8941 | ND |
2013-05-20 | 720647-8972 | 0.170 ppb |
2013-05-20 | 720651-8972 | ND |
2013-05-20 | 720649-8972 | ND |
2013-05-20 | 720645-8979 | 1.88 ppb |
2013-11-04 | 757023-10238 | 0.296 ppb |
2013-11-04 | 757025-10238 | ND |
2013-11-06 | 757696-10271 | 1.94 ppb |
2013-11-06 | 757698-10271 | 0.151 ppb |
2013-11-06 | 757702-10271 | ND |
2013-11-06 | 757700-10271 | ND |
2019-06-17 | 9063078-01 | 4.10 ppb |
2019-07-16 | 9073264-01 | 3.90 ppb |