1,4-Dioxane
NJ American Water - Atlantic County
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 | 0.0875 ppb | 24 | 11 | ND - 0.360 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | 0.101 ppb | 8 | 4 | ND - 0.310 ppb |
| 2017 | 0.125 ppb | 15 | 9 | ND - 0.360 ppb |
| 2018 | 0.0967 ppb | 15 | 10 | ND - 0.280 ppb |
| 2019 | 0.118 ppb | 15 | 8 | ND - 0.340 ppb |
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 |
|---|---|---|
| 2014-01-14 | 24539801 | ND |
| 2014-01-14 | 24543801 | ND |
| 2014-01-14 | 24540001 | 0.360 ppb |
| 2014-01-14 | 24539901 | ND |
| 2014-01-15 | 24543901 | 0.150 ppb |
| 2014-01-15 | 24540101 | ND |
| 2014-01-15 | 24540201 | 0.170 ppb |
| 2014-01-15 | 24540401 | ND |
| 2014-01-29 | 24540301 | 0.220 ppb |
| 2014-07-01 | 26171601 | ND |
| 2014-07-01 | 26177101 | 0.170 ppb |
| 2014-07-01 | 26171801 | 0.210 ppb |
| 2014-07-07 | 26171201 | ND |
| 2014-07-07 | 26171301 | 0.200 ppb |
| 2014-07-08 | 26177001 | ND |
| 2014-07-08 | 26171901 | ND |
| 2014-07-08 | 26176901 | ND |
| 2014-07-09 | 26170601 | 0.0700 ppb |
| 2014-07-09 | 26176801 | 0.180 ppb |
| 2014-07-09 | 26171401 | ND |
| 2014-07-15 | 26170701 | ND |
| 2014-07-15 | 26172101 | 0.160 ppb |
| 2014-07-16 | 26171501 | 0.210 ppb |
| 2014-08-05 | 26170801 | ND |
| 2016-07-28 | 33034601 | ND |
| 2016-07-28 | 33034701 | 0.310 ppb |
| 2016-07-28 | 33034501 | 0.130 ppb |
| 2016-07-28 | 33034401 | 0.0800 ppb |
| 2016-10-06 | 33648201 | ND |
| 2016-10-06 | 33648101 | ND |
| 2016-10-06 | 33648301 | ND |
| 2016-10-27 | 33648501 | 0.290 ppb |
| 2017-01-31 | 34425601 | 0.250 ppb |
| 2017-01-31 | 34426201 | 0.200 ppb |
| 2017-03-24 | 34425901 | ND |
| 2017-05-31 | 35317901 | ND |
| 2017-05-31 | 35583701 | 0.0800 ppb |
| 2017-05-31 | 35317801 | 0.230 ppb |
| 2017-05-31 | 35318201 | 0.280 ppb |
| 2017-07-17 | 36470701 | ND |
| 2017-07-17 | 36470501 | ND |
| 2017-07-17 | 36470901 | 0.220 ppb |
| 2017-07-27 | 36803401 | ND |
| 2017-10-02 | 37486301 | ND |
| 2017-10-02 | 37486901 | 0.0700 ppb |
| 2017-10-02 | 37486201 | 0.180 ppb |
| 2017-10-02 | 37486501 | 0.360 ppb |
| 2018-01-22 | 38424501 | ND |
| 2018-01-22 | 38425001 | 0.230 ppb |
| 2018-03-20 | 38948001 | ND |
| 2018-04-25 | 39261201 | 0.280 ppb |
| 2018-04-25 | 39261501 | 0.0800 ppb |
| 2018-04-25 | 39260901 | 0.220 ppb |
| 2018-04-26 | 39259001 | 0.0900 ppb |
| 2018-07-23 | 40429101 | 0.150 ppb |
| 2018-07-23 | 40429401 | 0.110 ppb |
| 2018-07-23 | 40430501 | ND |
| 2018-07-23 | 40427001 | 0.0800 ppb |
| 2018-10-02 | 41599101 | 0.1000 ppb |
| 2018-10-02 | 41598901 | 0.110 ppb |
| 2018-10-02 | 41600101 | ND |
| 2018-10-02 | 41597801 | ND |
| 2019-01-09 | 42621101 | 0.300 ppb |
| 2019-01-09 | 42620601 | 0.340 ppb |
| 2019-03-26 | 43459701 | ND |
| 2019-04-16 | 43686401 | ND |
| 2019-04-16 | 43685001 | 0.190 ppb |
| 2019-04-16 | 43685101 | 0.280 ppb |
| 2019-04-22 | 43686501 | 0.1000 ppb |
| 2019-07-22 | 45183601 | ND |
| 2019-07-22 | 45181201 | 0.250 ppb |
| 2019-07-22 | 45183501 | ND |
| 2019-07-22 | 45181101 | 0.130 ppb |
| 2019-11-01 | 46926801 | ND |
| 2019-11-01 | 46926901 | ND |
| 2019-11-01 | 46925301 | 0.180 ppb |
| 2019-11-01 | 46925201 | ND |