1,4-Dioxane
Meridian Water Department
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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.00440 ppb | 35 | 2 | ND - 0.0810 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 |
|---|---|---|
| 2014-03-04 | 1403136-001D | ND |
| 2014-03-04 | 1403154-001D | ND |
| 2014-03-04 | 1403137-001D | ND |
| 2014-03-04 | 1403134-001D | ND |
| 2014-03-04 | 1403132-001D | ND |
| 2014-03-04 | 1403135-001D | ND |
| 2014-03-05 | 1403157-001D | ND |
| 2014-03-05 | 1403160-001D | ND |
| 2014-03-05 | 1403155-001D | ND |
| 2014-03-05 | 1403159-001D | ND |
| 2014-03-05 | 1403158-001D | ND |
| 2014-03-05 | 1403156-001D | ND |
| 2014-03-06 | 1403212-001D | ND |
| 2014-03-06 | 1403214-001D | ND |
| 2014-03-06 | 1403213-001D | ND |
| 2014-03-06 | 1403211-001D | ND |
| 2014-04-08 | 1404324-001D | 0.0810 ppb |
| 2014-09-03 | 1409118-001D | ND |
| 2014-09-03 | 1409115-001D | ND |
| 2014-09-03 | 1409119-001D | ND |
| 2014-09-03 | 1409114-001D | ND |
| 2014-09-03 | 1409116-001D | ND |
| 2014-09-03 | 1409117-001D | 0.0730 ppb |
| 2014-09-04 | 1409163-001D | ND |
| 2014-09-04 | 1409164-001D | ND |
| 2014-09-08 | 1409268-001D | ND |
| 2014-09-08 | 1409266-001D | ND |
| 2014-09-08 | 1409269-001D | ND |
| 2014-09-08 | 1409265-001D | ND |
| 2014-09-08 | 1409267-001D | ND |
| 2014-09-09 | 1409319-001D | ND |
| 2014-09-09 | 1409316-001D | ND |
| 2014-09-09 | 1409317-001D | ND |
| 2014-09-09 | 1409318-001D | ND |
| 2014-09-09 | 1409315-001D | ND |