1,4-Dioxane
City of Corona
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 | 0.0441 ppb | 10 | 4 | ND - 0.130 ppb |
2014 | 0.0404 ppb | 20 | 7 | ND - 0.140 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 |
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 |
---|---|---|
2013-10-09 | 201310100240AM | ND |
2013-10-09 | 201310100242AM | 0.130 ppb |
2013-10-09 | 201310100238AM | ND |
2013-10-09 | 201310100234AM | ND |
2013-10-09 | 201310100236AM | ND |
2013-10-23 | 201310240246AM | 0.110 ppb |
2013-10-23 | 201310240240AM | 0.120 ppb |
2013-10-23 | 201310240244AM | ND |
2013-10-23 | 201310240242AM | 0.0810 ppb |
2013-10-23 | 201310240252AM | ND |
2014-01-15 | 201401150769AM | ND |
2014-01-15 | 201401150771AM | ND |
2014-01-15 | 201401150773AM | 0.120 ppb |
2014-01-16 | 201401170060AM | 0.120 ppb |
2014-01-16 | 201401170062AM | 0.1000 ppb |
2014-04-09 | 201404090851AM | ND |
2014-04-09 | 201404090849AM | ND |
2014-04-09 | 201404090853AM | ND |
2014-04-09 | 201404090855AM | ND |
2014-04-09 | 201404090857AM | 0.0970 ppb |
2014-04-17 | 201404180150AM | ND |
2014-04-17 | 201404180148AM | ND |
2014-04-22 | 201404220789AM | 0.120 ppb |
2014-04-24 | 201404240693AM | 0.110 ppb |
2014-04-24 | 201404240697AM | ND |
2014-07-10 | 201407100758AM | 0.140 ppb |
2014-07-10 | 201407100760AM | ND |
2014-07-10 | 201407100762AM | ND |
2014-07-10 | 201407100756AM | ND |
2014-07-15 | 201407150791AM | ND |