1,4-Dioxane
Ruidoso Water System
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 |
---|---|---|---|---|
2014 | N/A | 0 | 0 | N/A |
2015 | 0.00500 ppb | 16 | 1 | ND - 0.0800 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 |
---|---|---|
2015-01-29 | 201501310038AM | ND |
2015-03-11 | 201503120461AM | ND |
2015-03-11 | 201503120463AM | ND |
2015-03-11 | 201503120462AM | ND |
2015-04-28 | 201504060030AM | 0.0800 ppb |
2015-04-29 | 201504060028AM | ND |
2015-04-29 | 201504060029AM | ND |
2015-04-29 | 201504060027AM | ND |
2015-07-21 | 201506230633AM | ND |
2015-07-21 | 201506230634AM | ND |
2015-07-21 | 201506230636AM | ND |
2015-07-21 | 201506230635AM | ND |
2015-10-14 | 201509050105AM | ND |
2015-10-14 | 201509050106AM | ND |
2015-10-14 | 201509050108AM | ND |
2015-10-14 | 201509050107AM | ND |