1,4-Dioxane
Woodbury City 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 |
|---|---|---|---|---|
| 2013 | 0.201 ppb | 9 | 5 | ND - 0.789 ppb |
| 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 | 0.810 ppb | 1 | 1 | 0.810 ppb |
| 2019 | 0.681 ppb | 12 | 11 | ND - 0.810 ppb |
| 2020 | 0.648 ppb | 6 | 6 | 0.530 ppb - 0.770 ppb |
| 2021 | 0.363 ppb | 4 | 3 | ND - 0.530 ppb |
| 2022 | 0.675 ppb | 6 | 6 | 0.600 ppb - 0.800 ppb |
| 2023 | N/A | 0 | 0 | N/A |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2013-05-13 | 719534-8941 | 0.709 ppb |
| 2013-05-13 | 719530-8941 | ND |
| 2013-05-13 | 719532-8941 | ND |
| 2013-05-13 | 719522-8960 | ND |
| 2013-08-07 | 736146-9560 | ND |
| 2013-11-14 | 759224-10339 | 0.117 ppb |
| 2013-11-14 | 759226-10339 | 0.789 ppb |
| 2013-11-14 | 759222-10339 | 0.118 ppb |
| 2013-11-14 | 759178-10339 | 0.0745 ppb |
| 2014-02-11 | 770212-10747 | ND |
| 2018-10-24 | 4100634 | 0.810 ppb |
| 2019-01-16 | 4176223 | 0.810 ppb |
| 2019-01-16 | 4176222 | 0.770 ppb |
| 2019-01-16 | 4176221 | 0.810 ppb |
| 2019-04-10 | 4263876 | 0.650 ppb |
| 2019-04-10 | 4263875 | ND |
| 2019-04-10 | 4263874 | 0.640 ppb |
| 2019-07-17 | 4356943 | 0.770 ppb |
| 2019-07-17 | 4356942 | 0.760 ppb |
| 2019-07-17 | 4356941 | 0.780 ppb |
| 2019-10-09 | 4456920 | 0.720 ppb |
| 2019-10-09 | 4456922 | 0.690 ppb |
| 2019-10-09 | 4456921 | 0.770 ppb |
| 2020-01-21 | 4546109 | 0.770 ppb |
| 2020-01-21 | 4546107 | 0.760 ppb |
| 2020-01-21 | 4546108 | 0.690 ppb |
| 2020-04-17 | 4612665 | 0.570 ppb |
| 2020-04-17 | 4612666 | 0.530 ppb |
| 2020-04-17 | 4612667 | 0.570 ppb |
| 2021-07-13 | 4956975 | 0.530 ppb |
| 2021-07-13 | 4956976 | ND |
| 2021-10-06 | 630-22836-1 | 0.530 ppb |
| 2021-10-06 | 630-22836-2 | 0.390 ppb |
| 2022-02-23 | 630-27776-2 | 0.780 ppb |
| 2022-02-23 | 630-27776-1 | 0.640 ppb |
| 2022-02-23 | 630-27776-3 | 0.630 ppb |
| 2022-04-26 | 630-32054-3 | 0.800 ppb |
| 2022-04-26 | 630-32054-2 | 0.600 ppb |
| 2022-04-26 | 630-32054-1 | 0.600 ppb |