1,4-Dioxane
City of Moses Lake
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 | ND | 22 | 0 | ND |
| 2015 | ND | 4 | 0 | ND |
| 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 |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | N/A | 0 | 0 | N/A |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2014-05-05 | 201405060289AM | ND |
| 2014-05-05 | 201405060349AM | ND |
| 2014-05-05 | 201405060321AM | ND |
| 2014-05-05 | 201405060287AM | ND |
| 2014-05-05 | 201405060274AM | ND |
| 2014-05-06 | 201405070333AM | ND |
| 2014-05-06 | 201405070322AM | ND |
| 2014-05-06 | 201405070326AM | ND |
| 2014-05-07 | 201405080477AM | ND |
| 2014-05-08 | 201405090521AM | ND |
| 2014-05-12 | 201405130332AM | ND |
| 2014-11-10 | 201411120413AM | ND |
| 2014-11-13 | 201411150205AM | ND |
| 2014-11-13 | 201411150141AM | ND |
| 2014-11-13 | 201411150149AM | ND |
| 2014-11-13 | 201411150145AM | ND |
| 2014-11-17 | 201411180533AM | ND |
| 2014-11-17 | 201411180458AM | ND |
| 2014-11-17 | 201411180443AM | ND |
| 2014-11-18 | 201411190307AM | ND |
| 2014-11-18 | 201411190557AM | ND |
| 2014-11-18 | 201411190555AM | ND |
| 2015-05-18 | 201505190519AM | ND |
| 2015-05-18 | 201505190555AM | ND |
| 2015-11-10 | 201510300173AM | ND |
| 2015-11-10 | 201511110789AM | ND |