1,4-Dioxane
Meriden Water Division
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 | 4 | 0 | ND |
2014 | 0.0595 ppb | 20 | 3 | ND - 0.620 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 |
---|---|---|
2013-01-08 | 2762391 | ND |
2013-04-09 | 2807813 | ND |
2013-07-09 | 2854691 | ND |
2013-10-08 | 2909982 | ND |
2014-02-11 | 2971704 | ND |
2014-02-11 | 2971667 | ND |
2014-02-11 | 2971742 | ND |
2014-03-11 | 2990046 | ND |
2014-03-11 | 2990124 | ND |
2014-03-11 | 2990227 | 0.490 ppb |
2014-03-12 | 2990244 | ND |
2014-05-14 | 3026079 | ND |
2014-05-14 | 3026048 | ND |
2014-05-14 | 3026106 | ND |
2014-08-12 | 3081381 | ND |
2014-08-14 | 3083496 | ND |
2014-08-14 | 3083464 | ND |
2014-09-09 | 3100396 | 0.620 ppb |
2014-09-09 | 3100411 | ND |
2014-09-09 | 3100342 | 0.0800 ppb |
2014-09-09 | 3100367 | ND |
2014-11-12 | 3137923 | ND |
2014-11-12 | 3137934 | ND |
2014-12-16 | 3157190 | ND |