1,4-Dioxane
Rockford
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 | 1.19 ppb | 21 | 8 | ND - 22.9 ppb |
| 2015 | 0.793 ppb | 31 | 10 | ND - 21.6 ppb |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | 10.9 ppb | 3 | 3 | 6.70 ppb - 13.0 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 |
|---|---|---|
| 2014-07-08 | 801681-11759 | ND |
| 2014-07-08 | 801679-11759 | ND |
| 2014-07-08 | 801665-11759 | ND |
| 2014-07-08 | 801412-11759 | ND |
| 2014-07-08 | 801400-11759 | 0.111 ppb |
| 2014-07-08 | 801396-11759 | 0.203 ppb |
| 2014-07-08 | 801669-11759 | ND |
| 2014-07-08 | 801406-11759 | ND |
| 2014-07-08 | 801667-11759 | 0.467 ppb |
| 2014-07-08 | 801394-11759 | ND |
| 2014-07-08 | 801683-11823 | 22.9 ppb |
| 2014-07-08 | 801390-11759 | ND |
| 2014-07-08 | 801414-11759 | ND |
| 2014-07-08 | 801685-11842 | ND |
| 2014-07-08 | 801398-11759 | ND |
| 2014-07-08 | 801677-11759 | 0.689 ppb |
| 2014-07-08 | 801410-11759 | 0.113 ppb |
| 2014-07-08 | 801675-11759 | ND |
| 2014-07-08 | 801402-11759 | 0.436 ppb |
| 2014-07-08 | 801404-11759 | ND |
| 2014-07-08 | 801392-11759 | 0.0975 ppb |
| 2015-01-08 | 838237-13216 | ND |
| 2015-01-08 | 838252-13216 | ND |
| 2015-01-08 | 838246-13216 | 0.455 ppb |
| 2015-01-08 | 838216-13216 | ND |
| 2015-01-08 | 838256-13222 | ND |
| 2015-01-08 | 838248-13216 | 0.131 ppb |
| 2015-01-08 | 838242-13216 | 0.0973 ppb |
| 2015-01-08 | 838210-13216 | ND |
| 2015-01-08 | 838254-13222 | ND |
| 2015-01-08 | 838212-13216 | ND |
| 2015-01-08 | 838258-13222 | 0.226 ppb |
| 2015-01-08 | 838264-13222 | ND |
| 2015-01-08 | 838218-13216 | ND |
| 2015-01-08 | 838233-13216 | ND |
| 2015-01-08 | 838235-13216 | ND |
| 2015-01-08 | 838227-13216 | ND |
| 2015-01-08 | 838225-13216 | 0.511 ppb |
| 2015-01-08 | 838250-13216 | 0.149 ppb |
| 2015-01-08 | 838244-13216 | 0.746 ppb |
| 2015-01-08 | 838220-13216 | ND |
| 2015-01-08 | 838208-13216 | ND |
| 2015-07-13 | 870176-14510 | ND |
| 2015-07-13 | 870180-14510 | 0.496 ppb |
| 2015-07-13 | 870174-14510 | ND |
| 2015-07-13 | 870178-14510 | ND |
| 2015-07-13 | 870170-14510 | ND |
| 2015-07-13 | 870172-14514 | 21.6 ppb |
| 2015-07-13 | 870168-14510 | 0.206 ppb |
| 2015-09-14 | 882884-14967 | ND |
| 2015-12-09 | 897655-15534 | ND |
| 2015-12-09 | 897657-15534 | ND |
| 2019-06-17 | 9063734-01 | 13.0 ppb |
| 2019-07-26 | 9076124-04 | 13.0 ppb |
| 2019-11-08 | 9112291-06 | 6.70 ppb |