1,4-Dioxane
Ramsey 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 |
|---|---|---|---|---|
| 2014 | 0.0644 ppb | 7 | 2 | ND - 0.360 ppb |
| 2015 | 0.0677 ppb | 7 | 3 | ND - 0.300 ppb |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | 0.0140 ppb | 21 | 2 | ND - 0.200 ppb |
| 2018 | 0.0497 ppb | 24 | 16 | ND - 0.260 ppb |
| 2019 | 0.180 ppb | 29 | 23 | ND - 3.80 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 |
|---|---|---|
| 2014-07-22 | 201407230524AM | ND |
| 2014-07-22 | 201407230513AM | 0.360 ppb |
| 2014-07-22 | 201407230797AM | ND |
| 2014-07-23 | 201407240370AM | ND |
| 2014-07-23 | 201407240611AM | 0.0910 ppb |
| 2014-07-23 | 201407240328AM | ND |
| 2014-10-29 | 201410300270AM | ND |
| 2015-01-20 | 201501220346AM | ND |
| 2015-01-20 | 201501220580AM | ND |
| 2015-01-21 | 201501220559AM | 0.1000 ppb |
| 2015-01-26 | 201501280682AM | 0.0740 ppb |
| 2015-01-26 | 201501270148AM | ND |
| 2015-04-21 | 201504220363AM | ND |
| 2015-04-29 | 201504300134AM | 0.300 ppb |
| 2017-03-22 | 7014121006 | ND |
| 2017-03-22 | 7014121003 | ND |
| 2017-03-22 | 7014121002 | ND |
| 2017-03-22 | 7014121005 | ND |
| 2017-03-22 | 7014121004 | ND |
| 2017-03-22 | 7014121001 | ND |
| 2017-05-10 | 7018534007 | ND |
| 2017-05-10 | 7018534006 | ND |
| 2017-05-10 | 7018534004 | ND |
| 2017-05-10 | 7018534003 | ND |
| 2017-05-10 | 7018534002 | ND |
| 2017-05-10 | 7018534001 | ND |
| 2017-05-10 | 7018534005 | ND |
| 2017-08-15 | 7027356006 | ND |
| 2017-08-15 | 7027356007 | ND |
| 2017-08-15 | 7027356003 | 0.0950 ppb |
| 2017-08-15 | 7027356004 | 0.200 ppb |
| 2017-08-15 | 7027356002 | ND |
| 2017-08-15 | 7027356001 | ND |
| 2017-08-15 | 7027356005 | ND |
| 2017-08-15 | 7027356008 | ND |
| 2018-02-12 | 7042889005-DOX | ND |
| 2018-02-12 | 7042889002-DOX | ND |
| 2018-02-12 | 7042889001-DOX | ND |
| 2018-02-12 | 7042889007-DOX | ND |
| 2018-02-12 | 7042889006-DOX | ND |
| 2018-02-12 | 7042889004-DOX | ND |
| 2018-02-12 | 7042889003-DOX | 0.0940 ppb |
| 2018-05-21 | 7052359005-DOX | 0.260 ppb |
| 2018-05-21 | 7052359009-DOX | 0.0480 ppb |
| 2018-05-21 | 7052359002-DOX | 0.0470 ppb |
| 2018-05-21 | 7052359003-DOX | 0.0910 ppb |
| 2018-05-21 | 7052359008-DOX | 0.0560 ppb |
| 2018-05-21 | 7052359004-DOX | 0.240 ppb |
| 2018-05-21 | 7052359007-DOX | ND |
| 2018-05-21 | 7052359001-DOX | 0.0300 ppb |
| 2018-05-21 | 7052359006-DOX | 0.0490 ppb |
| 2018-08-20 | 2333965001 | 0.0380 ppb |
| 2018-11-05 | 7070077002-DOX | 0.0350 ppb |
| 2018-11-05 | 7070077004-DOX | 0.0270 ppb |
| 2018-11-05 | 7070077003-DOX | 0.0780 ppb |
| 2018-11-05 | 7070077001-DOX | 0.0250 ppb |
| 2018-11-05 | 7070077005-DOX | ND |
| 2018-11-05 | 7070077007-DOX | 0.0540 ppb |
| 2018-11-05 | 7070077006-DOX | 0.0200 ppb |
| 2019-02-11 | 7079189002-DOX | 0.0460 ppb |
| 2019-02-11 | 7079189001-DOX | 0.0270 ppb |
| 2019-02-11 | 7079189004-DOX | 0.0610 ppb |
| 2019-02-11 | 7079189005-DOX | ND |
| 2019-02-11 | 7079189003-DOX | 0.130 ppb |
| 2019-02-11 | 7079189006-DOX | 0.0860 ppb |
| 2019-05-13 | 7089518001-DOX | ND |
| 2019-05-13 | 7089518003-DOX | 0.0790 ppb |
| 2019-05-13 | 7089518002-DOX | 0.0230 ppb |
| 2019-05-13 | 7089518006-DOX | 0.0620 ppb |
| 2019-05-13 | 7089518005-DOX | 0.0610 ppb |
| 2019-05-13 | 7089518004-DOX | ND |
| 2019-06-18 | 7094204002-DOX | 0.0360 ppb |
| 2019-06-18 | 7094204001-DOX | 0.240 ppb |
| 2019-08-12 | 70101001001-DOX | ND |
| 2019-08-12 | 70101001002-DOX | 0.0530 ppb |
| 2019-08-12 | 70101001006-DOX | 3.80 ppb |
| 2019-08-12 | 70101001005-DOX | 0.0620 ppb |
| 2019-08-12 | 70101001004-DOX | 0.0500 ppb |
| 2019-08-12 | 70101001007-DOX | 0.0410 ppb |
| 2019-08-12 | 70101001008-DOX | 0.0850 ppb |
| 2019-08-12 | 70101001003-DOX | 0.0200 ppb |
| 2019-11-12 | 70111640006-DOX | 0.0740 ppb |
| 2019-11-12 | 70111640002-DOX | 0.0350 ppb |
| 2019-11-12 | 70111640001-DOX | ND |
| 2019-11-12 | 70111640005-DOX | ND |
| 2019-11-12 | 70111640007-DOX | 0.0530 ppb |
| 2019-11-12 | 70111640004-DOX | 0.0240 ppb |
| 2019-11-12 | 70111640003-DOX | 0.0790 ppb |