1,4-Dioxane
Artesian 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 | 0.211 ppb | 18 | 5 | ND - 2.20 ppb |
| 2014 | 0.127 ppb | 18 | 6 | ND - 1.30 ppb |
| 2015 | ND | 10 | 0 | ND |
| 2016 | 1.98 ppb | 4 | 1 | ND - 7.90 ppb |
| 2017 | 0.545 ppb | 4 | 2 | ND - 1.30 ppb |
| 2018 | 5.89 ppb | 4 | 4 | 0.1000 ppb - 23.0 ppb |
| 2019 | 0.430 ppb | 4 | 2 | ND - 1.60 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 |
|---|---|---|
| 2013-07-17 | 2860769 | ND |
| 2013-07-17 | 2860814 | ND |
| 2013-07-17 | 2860383 | ND |
| 2013-07-17 | 2860834 | ND |
| 2013-07-17 | 2860883 | ND |
| 2013-07-17 | 2860506 | ND |
| 2013-07-17 | 2860192 | 2.20 ppb |
| 2013-07-17 | 2860938 | ND |
| 2013-07-17 | 2860333 | 0.410 ppb |
| 2013-07-17 | 2860256 | 0.170 ppb |
| 2013-07-17 | 2860372 | ND |
| 2013-07-17 | 2860414 | 0.920 ppb |
| 2013-07-17 | 2860741 | ND |
| 2013-07-17 | 2860798 | 0.1000 ppb |
| 2013-07-17 | 2860756 | ND |
| 2013-07-17 | 2860927 | ND |
| 2013-07-17 | 2860344 | ND |
| 2013-10-15 | 2913844 | ND |
| 2014-01-28 | 2964182 | ND |
| 2014-01-28 | 2964214 | ND |
| 2014-01-28 | 2964144 | ND |
| 2014-01-28 | 2964203 | 0.0800 ppb |
| 2014-01-28 | 2964161 | 0.360 ppb |
| 2014-01-28 | 2964086 | ND |
| 2014-01-28 | 2964124 | ND |
| 2014-01-28 | 2964036 | 0.190 ppb |
| 2014-01-28 | 2964239 | ND |
| 2014-01-28 | 2964098 | ND |
| 2014-01-28 | 2964109 | ND |
| 2014-01-28 | 2964070 | ND |
| 2014-01-28 | 2964226 | 1.30 ppb |
| 2014-01-28 | 2964251 | ND |
| 2014-01-28 | 2964268 | 0.110 ppb |
| 2014-01-28 | 2964055 | ND |
| 2014-04-23 | 3014330 | ND |
| 2014-07-16 | 3064486 | 0.250 ppb |
| 2015-01-20 | 3173130 | ND |
| 2015-02-23 | 3194076 | ND |
| 2015-03-11 | 3204047 | ND |
| 2015-03-24 | 3213527 | ND |
| 2015-04-22 | 3230725 | ND |
| 2015-06-22 | 3268028 | ND |
| 2015-07-14 | 3280770 | ND |
| 2015-08-18 | 3305972 | ND |
| 2015-10-21 | 3346208 | ND |
| 2015-11-17 | 3361275 | ND |
| 2016-01-27 | 3391769 | ND |
| 2016-04-19 | 3434470 | ND |
| 2016-10-19 | 3569884 | 7.90 ppb |
| 2016-11-21 | 3591430 | ND |
| 2017-01-17 | 3624439 | ND |
| 2017-04-19 | 3679562 | 1.30 ppb |
| 2017-07-18 | 3737181 | ND |
| 2017-10-17 | 3804317 | 0.880 ppb |
| 2018-04-23 | 3920121 | 0.1000 ppb |
| 2018-07-23 | 3999696 | 0.310 ppb |
| 2018-10-29 | 4104892 | 23.0 ppb |
| 2018-12-11 | 4147249 | 0.160 ppb |
| 2019-01-24 | 4183442 | 1.60 ppb |
| 2019-04-15 | 4260840 | ND |
| 2019-09-05 | 4410984 | 0.120 ppb |
| 2019-12-18 | 4521731 | ND |