1,4-Dioxane
City of Manteca
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 | 25 | 0 | ND |
2014 | ND | 1 | 0 | ND |
2015 | N/A | 0 | 0 | N/A |
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 |
---|---|---|
2013-05-14 | A3E1304-01A | ND |
2013-05-22 | A3E1910-03A | ND |
2013-05-22 | A3E1910-10A | ND |
2013-05-22 | A3E1910-15A | ND |
2013-05-22 | A3E1910-12A | ND |
2013-05-22 | A3E1910-08A | ND |
2013-05-22 | A3E1910-26A | ND |
2013-05-22 | A3E1910-22A | ND |
2013-05-22 | A3E1910-24A | ND |
2013-05-22 | A3E1910-01A | ND |
2013-05-22 | A3E1910-19A | ND |
2013-05-22 | A3E1910-17A | ND |
2013-08-14 | A3H0730-01A | ND |
2013-11-18 | A3J2218-15A | ND |
2013-11-19 | A3J2218-05A | ND |
2013-11-19 | A3J2218-21A | ND |
2013-11-19 | A3J2218-03A | ND |
2013-11-19 | A3J2218-09A | ND |
2013-11-19 | A3J2218-07A | ND |
2013-11-19 | A3J2230-01A | ND |
2013-11-19 | A3J2218-11A | ND |
2013-11-19 | A3J2218-01A | ND |
2013-11-19 | A3J2218-13A | ND |
2013-11-19 | A3J2218-19A | ND |
2013-11-19 | A3J2218-17A | ND |
2014-04-23 | A4D1242-01A | ND |