1,4-Dioxane
Lacey 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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | ND | 13 | 0 | ND |
2015 | 0.00585 ppb | 13 | 1 | ND - 0.0760 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 |
---|---|---|
2014-12-02 | 201412040482AM | ND |
2014-12-02 | 201412040301AM | ND |
2014-12-02 | 201412040255AM | ND |
2014-12-02 | 201412040492AM | ND |
2014-12-03 | 201412040345AM | ND |
2014-12-03 | 201412050528AM | ND |
2014-12-03 | 201412040287AM | ND |
2014-12-03 | 201412040484AM | ND |
2014-12-03 | 201412050482AM | ND |
2014-12-03 | 201412050406AM | ND |
2014-12-04 | 201412040579AM | ND |
2014-12-04 | 201412050498AM | ND |
2014-12-04 | 201412050473AM | ND |
2015-06-29 | 201506300307AM | ND |
2015-06-29 | 201506300498AM | ND |
2015-06-29 | 201506300327AM | ND |
2015-06-29 | 201506300268AM | ND |
2015-06-29 | 201506300314AM | ND |
2015-06-29 | 201506300274AM | ND |
2015-06-30 | 201507010547AM | ND |
2015-06-30 | 201507010636AM | ND |
2015-06-30 | 201507010523AM | ND |
2015-06-30 | 201507010518AM | ND |
2015-06-30 | 201507010550AM | ND |
2015-06-30 | 201507010336AM | 0.0760 ppb |
2015-08-24 | 201508250675AM | ND |