1,4-Dioxane
Sparta Twp Water Utility - Lake Mohawk
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 | 0.139 ppb | 20 | 2 | ND - 2.70 ppb |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | 3.70 ppb | 3 | 3 | 3.40 ppb - 4.10 ppb |
| 2017 | 2.80 ppb | 1 | 1 | 2.80 ppb |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
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 |
|---|---|---|
| 2013-05-08 | 1027114018 | ND |
| 2013-05-08 | 1027114015 | ND |
| 2013-05-08 | 1027114030 | ND |
| 2013-05-08 | 1027114027 | ND |
| 2013-05-08 | 1027114039 | ND |
| 2013-05-08 | 1027114033 | ND |
| 2013-05-08 | 1027114036 | ND |
| 2013-05-10 | 1027114012 | ND |
| 2013-05-10 | 1027114021 | 2.70 ppb |
| 2013-05-10 | 1027114024 | ND |
| 2013-05-10 | 1027114003 | ND |
| 2013-05-10 | 1027114006 | ND |
| 2013-05-10 | 1027114009 | ND |
| 2013-11-07 | 1057818003 | ND |
| 2013-11-07 | 1057818006 | 0.0760 ppb |
| 2013-11-07 | 1057818009 | ND |
| 2013-11-07 | 1057818015 | ND |
| 2013-11-07 | 1057818012 | ND |
| 2013-11-12 | 1058805004 | ND |
| 2013-11-12 | 1058805001 | ND |
| 2016-06-21 | 1606P23-001 | 3.40 ppb |
| 2016-09-13 | 1609D34-001 | 4.10 ppb |
| 2016-11-29 | 705813001 | 3.60 ppb |
| 2017-01-26 | 7010037001 | 2.80 ppb |