1,4-Dioxane
Mountain Water Company
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 | ND | 16 | 0 | ND |
| 2014 | ND | 14 | 0 | ND |
| 2015 | ND | 14 | 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 |
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 |
|---|---|---|
| 2013-05-07 | 718194-8830 | ND |
| 2013-05-08 | 718433-8830 | ND |
| 2013-05-14 | 719477-8941 | ND |
| 2013-05-14 | 719518-8941 | ND |
| 2013-05-14 | 719520-8941 | ND |
| 2013-05-15 | 719821-8960 | ND |
| 2013-05-15 | 719823-8960 | ND |
| 2013-05-21 | 720742-8972 | ND |
| 2013-11-19 | 759553-10373 | ND |
| 2013-11-19 | 759549-10373 | ND |
| 2013-11-19 | 759535-10357 | ND |
| 2013-11-20 | 759882-10380 | ND |
| 2013-11-20 | 759880-10380 | ND |
| 2013-11-25 | 760469-10399 | ND |
| 2013-11-25 | 760458-10399 | ND |
| 2013-11-25 | 760466-10399 | ND |
| 2014-05-20 | 790729-11496 | ND |
| 2014-05-20 | 790745-11496 | ND |
| 2014-05-20 | 790747-11496 | ND |
| 2014-05-20 | 790731-11496 | ND |
| 2014-05-21 | 791855-11545 | ND |
| 2014-05-21 | 791853-11545 | ND |
| 2014-05-21 | 792082-11545 | ND |
| 2014-11-05 | 830256-12826 | ND |
| 2014-11-05 | 830254-12826 | ND |
| 2014-11-05 | 830250-12826 | ND |
| 2014-11-05 | 830258-12826 | ND |
| 2014-11-05 | 830252-12826 | ND |
| 2014-11-24 | 832943-12977 | ND |
| 2014-11-24 | 832941-12977 | ND |
| 2015-05-06 | 858619-14076 | ND |
| 2015-05-06 | 858624-14076 | ND |
| 2015-05-06 | 858622-14076 | ND |
| 2015-05-06 | 858627-14076 | ND |
| 2015-05-12 | 859531-14139 | ND |
| 2015-05-12 | 859529-14139 | ND |
| 2015-05-12 | 859527-14139 | ND |
| 2015-11-09 | 893222-15411 | ND |
| 2015-11-09 | 893226-15411 | ND |
| 2015-11-09 | 893228-15411 | ND |
| 2015-11-09 | 893230-15411 | ND |
| 2015-11-09 | 893224-15411 | ND |
| 2015-11-10 | 893564-15411 | ND |
| 2015-11-17 | 894625-15449 | ND |