1,4-Dioxane
City of Brentwood
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 | ND | 19 | 0 | ND |
2015 | ND | 1 | 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 |
---|---|---|
2014-02-24 | 201402250324AM | ND |
2014-02-24 | 201402250188AM | ND |
2014-02-25 | 201402260618AM | ND |
2014-02-25 | 201402260651AM | ND |
2014-02-26 | 201402270193AM | ND |
2014-02-26 | 201402270329AM | ND |
2014-02-26 | 201402270327AM | ND |
2014-02-27 | 201402280318AM | ND |
2014-05-28 | 201405290453AM | ND |
2014-08-25 | 201408260401AM | ND |
2014-08-25 | 201408260388AM | ND |
2014-08-25 | 201408260279AM | ND |
2014-08-25 | 201408270535AM | ND |
2014-08-28 | 201408300019AM | ND |
2014-08-28 | 201408300021AM | ND |
2014-08-28 | 201408300025AM | ND |
2014-08-28 | 201408300023AM | ND |
2014-08-28 | 201408300027AM | ND |
2014-11-19 | 201411200471AM | ND |
2015-02-19 | 201502200320AM | ND |