1,4-Dioxane
Burbank Water Department
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 | 0.283 ppb | 7 | 3 | ND - 0.780 ppb |
| 2015 | 0.200 ppb | 5 | 1 | ND - 1.000 ppb |
| 2016 | ND | 4 | 0 | ND |
| 2017 | ND | 4 | 0 | ND |
| 2018 | 0.275 ppb | 4 | 1 | ND - 1.10 ppb |
| 2019 | ND | 4 | 0 | ND |
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 |
|---|---|---|
| 2014-01-06 | 9590-053-0715 | ND |
| 2014-04-07 | 9590-053-0705 | ND |
| 2014-06-06 | 201406060383AM | 0.600 ppb |
| 2014-07-07 | 9590-053-0700 | ND |
| 2014-09-12 | 201409120919AM | 0.600 ppb |
| 2014-10-06 | 9590-053-0710 | ND |
| 2014-12-05 | 201412050269AM | 0.780 ppb |
| 2015-01-05 | 9590-053-0840 | ND |
| 2015-03-04 | 201503040299AM | 1.000 ppb |
| 2015-04-06 | 9590-053-0730 | ND |
| 2015-07-06 | 9590-053-0730 | ND |
| 2015-10-05 | 9590-053-0700 | ND |
| 2016-01-04 | 9590-053-1045 | ND |
| 2016-04-13 | 9590-053-0800 | ND |
| 2016-07-05 | 9590-053-0830 | ND |
| 2016-10-03 | 9590-053-0920 | ND |
| 2017-01-03 | 9590-053-0720 | ND |
| 2017-04-10 | 9588-053-0800 | ND |
| 2017-07-03 | 9588-053-0700 | ND |
| 2017-10-02 | 9588-053-0710 | ND |
| 2018-01-02 | 9588-053-0800 | ND |
| 2018-04-02 | 9588-053-0700 | ND |
| 2018-07-02 | 9588-053-0700 | ND |
| 2018-10-01 | 9588-053-0800 | 1.10 ppb |
| 2019-01-07 | 9588-053-0705 | ND |
| 2019-04-01 | 9588-053-0720 | ND |
| 2019-07-01 | 9588-053-0815 | ND |
| 2019-10-07 | 9588-053-0700 | ND |