1,4-Dioxane
Eastern Municipal Water District
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 | 0.00252 ppb | 31 | 1 | ND - 0.0780 ppb |
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 |
---|---|---|
2013-04-15 | B3D1611-01 | ND |
2013-04-15 | B3D1604-01 | ND |
2013-04-15 | B3D1611-03 | ND |
2013-04-15 | B3D1611-05 | ND |
2013-04-15 | B3D1604-09 | ND |
2013-04-15 | B3D1604-07 | ND |
2013-04-15 | B3D1611-09 | ND |
2013-04-15 | B3D1604-03 | ND |
2013-04-15 | B3D1611-07 | ND |
2013-04-15 | B3D1604-11 | ND |
2013-04-15 | B3D1604-13 | ND |
2013-04-15 | B3D1604-05 | ND |
2013-06-06 | B3F0711-01 | ND |
2013-07-15 | B3G1396-01 | ND |
2013-07-15 | B3G1403-01 | ND |
2013-07-15 | B3G1398-01 | ND |
2013-07-15 | B3G1395-01 | ND |
2013-07-15 | B3G1399-01 | ND |
2013-10-07 | B3J0719-01 | ND |
2013-10-07 | B3J0725-01 | ND |
2013-10-07 | B3J0720-01 | ND |
2013-10-07 | B3J0724-01 | ND |
2013-10-07 | B3J0727-01 | ND |
2013-10-07 | B3J0723-01 | ND |
2013-10-08 | B3J0898-01 | ND |
2013-10-08 | B3J0891-01 | ND |
2013-10-08 | B3J0896-01 | ND |
2013-10-08 | B3J0900-01 | ND |
2013-11-25 | B3K2305-01 | ND |
2013-11-25 | B3K2296-01 | ND |
2013-11-26 | B3K2309-01 | 0.0780 ppb |
2014-01-06 | B4A0341-01 | ND |
2014-01-06 | B4A0336-01 | ND |
2014-01-06 | B4A0338-01 | ND |
2014-01-06 | B4A0337-01 | ND |
2014-01-06 | B4A0339-01 | ND |