1,4-Dioxane
Apple Valley Ranchos 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 | 0.0300 ppb | 12 | 2 | ND - 0.200 ppb |
| 2014 | ND | 9 | 0 | ND |
| 2015 | ND | 11 | 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 |
|---|---|---|
| 2013-06-05 | B3F0568-09 | ND |
| 2013-06-05 | B3F0568-07 | ND |
| 2013-06-05 | B3F0568-05 | ND |
| 2013-06-05 | B3F0568-01 | ND |
| 2013-06-05 | B3F0568-11 | ND |
| 2013-06-05 | B3F0568-03 | 0.160 ppb |
| 2013-12-13 | B3L1370-16 | ND |
| 2013-12-13 | B3L1370-13 | ND |
| 2013-12-13 | B3L1370-22 | ND |
| 2013-12-13 | B3L1370-19 | 0.200 ppb |
| 2013-12-13 | B3L1370-25 | ND |
| 2013-12-13 | B3L1370-28 | ND |
| 2014-06-19 | B4F2049-07 | ND |
| 2014-06-19 | B4F2049-01 | ND |
| 2014-06-19 | B4F2049-04 | ND |
| 2014-06-19 | B4F2049-10 | ND |
| 2014-12-11 | B4L1471-13 | ND |
| 2014-12-11 | B4L1471-07 | ND |
| 2014-12-11 | B4L1471-04 | ND |
| 2014-12-11 | B4L1471-10 | ND |
| 2014-12-11 | B4L1471-01 | ND |
| 2015-03-11 | B5C1183-10 | ND |
| 2015-03-11 | B5C1183-01 | ND |
| 2015-03-11 | B5C1183-04 | ND |
| 2015-03-11 | B5C1183-07 | ND |
| 2015-03-11 | B5C1183-13 | ND |
| 2015-05-21 | B5E2179-01 | ND |
| 2015-09-03 | B5I0501-04 | ND |
| 2015-09-03 | B5I0501-10 | ND |
| 2015-09-03 | B5I0501-01 | ND |
| 2015-09-03 | B5I0501-13 | ND |
| 2015-09-03 | B5I0501-07 | ND |