1,4-Dioxane
Moorestown 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 | 0.0995 ppb | 6 | 2 | ND - 0.305 ppb |
| 2014 | ND | 1 | 0 | ND |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 0.554 ppb | 10 | 10 | 0.420 ppb - 0.650 ppb |
| 2018 | 0.556 ppb | 12 | 11 | ND - 0.820 ppb |
| 2019 | 0.598 ppb | 6 | 4 | ND - 0.940 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 |
|---|---|---|
| 2013-03-12 | 709369-8500 | ND |
| 2013-06-11 | 725035-9203 | 0.305 ppb |
| 2013-06-11 | 725025-9124 | ND |
| 2013-09-10 | 743499-9902 | 0.292 ppb |
| 2013-09-10 | 743505-9902 | ND |
| 2013-09-10 | 743495-9902 | ND |
| 2014-06-24 | 799160-11718 | ND |
| 2017-03-21 | 3657908 | 0.630 ppb |
| 2017-04-26 | 3683057 | 0.650 ppb |
| 2017-05-24 | 3700949 | 0.600 ppb |
| 2017-06-28 | 3724248 | 0.490 ppb |
| 2017-07-26 | 3742939 | 0.420 ppb |
| 2017-08-23 | 3764973 | 0.510 ppb |
| 2017-09-27 | 3790178 | 0.540 ppb |
| 2017-10-25 | 3809083 | 0.550 ppb |
| 2017-11-29 | 3829488 | 0.580 ppb |
| 2017-12-13 | 3839545 | 0.570 ppb |
| 2018-01-24 | 3858002 | 0.580 ppb |
| 2018-02-07 | 3868318 | 0.680 ppb |
| 2018-03-09 | 3889051 | 0.530 ppb |
| 2018-03-28 | 3902986 | 0.500 ppb |
| 2018-04-27 | 3924205 | 0.580 ppb |
| 2018-05-16 | 3943605 | 0.520 ppb |
| 2018-06-13 | 3962516 | 0.590 ppb |
| 2018-07-25 | 4004778 | 0.640 ppb |
| 2018-08-08 | 4018746 | 0.560 ppb |
| 2018-09-05 | 4049092 | 0.820 ppb |
| 2018-11-14 | 4128550 | 0.670 ppb |
| 2018-12-26 | 4159377 | ND |
| 2019-05-08 | 4292082 | ND |
| 2019-06-05 | 4318392 | 0.940 ppb |
| 2019-07-10 | 4353618 | 0.870 ppb |
| 2019-08-14 | 4388967 | 0.900 ppb |
| 2019-09-04 | 4411312 | 0.880 ppb |
| 2019-10-30 | 4476939 | ND |