1,4-Dioxane
North Lenoir Water Corp
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 | 0.00483 ppb | 29 | 1 | ND - 0.140 ppb |
2015 | ND | 1 | 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 |
---|---|---|
2014-05-14 | 201405150175AM | ND |
2014-05-14 | 201405150179AM | ND |
2014-05-14 | 201405150487AM | ND |
2014-05-14 | 201405150177AM | ND |
2014-05-14 | 201405150190AM | ND |
2014-05-15 | 201405160359AM | ND |
2014-05-15 | 201405160311AM | ND |
2014-05-15 | 201405160365AM | ND |
2014-05-15 | 201405160367AM | ND |
2014-05-19 | 201405200223AM | ND |
2014-05-19 | 201405200233AM | ND |
2014-05-19 | 201405200235AM | ND |
2014-05-19 | 201405200269AM | ND |
2014-05-20 | 201405210538AM | ND |
2014-08-28 | 201408300380AM | ND |
2014-11-03 | 201411040479AM | ND |
2014-11-03 | 201411040528AM | 0.140 ppb |
2014-11-03 | 201411040198AM | ND |
2014-11-03 | 201411040477AM | ND |
2014-11-03 | 201411040229AM | ND |
2014-11-03 | 201411040221AM | ND |
2014-11-04 | 201411050478AM | ND |
2014-11-04 | 201411050453AM | ND |
2014-11-04 | 201411050399AM | ND |
2014-11-04 | 201411050447AM | ND |
2014-11-04 | 201411050544AM | ND |
2014-11-04 | 201411050548AM | ND |
2014-12-16 | 201412170695AM | ND |
2014-12-16 | 201412170546AM | ND |
2015-01-29 | 201501300220AM | ND |