1,4-Dioxane
City of Peoria
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 | N/A | 0 | 0 | N/A |
| 2015 | 0.00300 ppb | 28 | 1 | ND - 0.0840 ppb |
| 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 |
|---|---|---|
| 2015-01-05 | 201501050215AM | ND |
| 2015-01-05 | 201501050217AM | ND |
| 2015-01-05 | 201501050219AM | ND |
| 2015-01-07 | 201501070278AM | ND |
| 2015-01-07 | 201501070282AM | ND |
| 2015-01-07 | 201501070284AM | ND |
| 2015-01-07 | 201501070280AM | ND |
| 2015-01-12 | 201501120144AM | ND |
| 2015-01-12 | 201501120148AM | ND |
| 2015-01-12 | 201501120146AM | ND |
| 2015-01-14 | 201501140544AM | ND |
| 2015-01-14 | 201501140546AM | ND |
| 2015-01-14 | 201501140548AM | ND |
| 2015-04-13 | 201504130115AM | ND |
| 2015-07-06 | 201507060187AM | ND |
| 2015-07-06 | 201507060185AM | 0.0840 ppb |
| 2015-07-06 | 201507060195AM | ND |
| 2015-07-08 | 201507080315AM | ND |
| 2015-07-08 | 201507080313AM | ND |
| 2015-07-08 | 201507080317AM | ND |
| 2015-07-08 | 201507080311AM | ND |
| 2015-07-13 | 201507130198AM | ND |
| 2015-07-13 | 201507130200AM | ND |
| 2015-07-13 | 201507130202AM | ND |
| 2015-07-15 | 201507150212AM | ND |
| 2015-07-15 | 201507150214AM | ND |
| 2015-07-16 | 201507160272AM | ND |
| 2015-10-06 | 201510060417AM | ND |