1,4-Dioxane
IL American - 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 |
|---|---|---|---|---|
| 2013 | 1.08 ppb | 9 | 5 | ND - 4.98 ppb |
| 2014 | 2.08 ppb | 1 | 1 | 2.08 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 | 1.77 ppb | 6 | 6 | 0.190 ppb - 8.54 ppb |
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 |
|---|---|---|
| 2013-04-08 | 21365201 | 1.97 ppb |
| 2013-04-08 | 21365801 | ND |
| 2013-04-08 | 21365401 | ND |
| 2013-04-08 | 21365601 | 1.51 ppb |
| 2013-07-08 | 22744901 | 4.98 ppb |
| 2013-07-08 | 22745101 | 0.250 ppb |
| 2013-10-01 | 23655801 | 0.970 ppb |
| 2013-10-02 | 23656001 | ND |
| 2013-10-09 | 23655601 | ND |
| 2014-01-07 | 24378701 | 2.08 ppb |
| 2019-04-04 | 44031801 | 0.380 ppb |
| 2019-04-04 | 44031901 | 0.350 ppb |
| 2019-07-08 | 45118301 | 0.270 ppb |
| 2019-07-09 | 45773501 | 8.54 ppb |
| 2019-10-02 | 46665901 | 0.900 ppb |
| 2019-10-03 | 46665801 | 0.190 ppb |