1,4-Dioxane
Redlands City
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 | ND | 27 | 0 | ND |
2014 | ND | 5 | 0 | ND |
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 |
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 |
---|---|---|
2013-03-07 | 201303080061AM | ND |
2013-03-07 | 201303080065AM | ND |
2013-04-09 | 201304100184AM | ND |
2013-04-09 | 201304100186AM | ND |
2013-04-09 | 201304100190AM | ND |
2013-04-09 | 201304100188AM | ND |
2013-05-16 | 201305160481AM | ND |
2013-05-16 | 201305160483AM | ND |
2013-05-16 | 201305160479AM | ND |
2013-05-16 | 201305160477AM | ND |
2013-05-20 | 201305210005AM | ND |
2013-06-06 | 201306060430AM | ND |
2013-09-10 | 201309100773AM | ND |
2013-09-10 | 201309100777AM | ND |
2013-10-17 | 201310180221AM | ND |
2013-10-17 | 201310180223AM | ND |
2013-10-17 | 201310180217AM | ND |
2013-10-17 | 201310180204AM | ND |
2013-10-17 | 201310180198AM | ND |
2013-10-17 | 201310180202AM | ND |
2013-10-17 | 201310180200AM | ND |
2013-11-26 | 201311260948AM | ND |
2013-11-26 | 201311260950AM | ND |
2013-11-26 | 201311260944AM | ND |
2013-11-26 | 201311260952AM | ND |
2013-11-26 | 201311260946AM | ND |
2013-12-19 | 201312190647AM | ND |
2014-01-06 | 201401060269AM | ND |
2014-04-24 | 201404240685AM | ND |
2014-04-29 | 201404300397AM | ND |
2014-04-30 | 201405010264AM | ND |
2014-07-28 | 201407280357AM | ND |