1,4-Dioxane
Las Cruces Municipal Water System
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 | 0.173 ppb | 18 | 2 | ND - 2.60 ppb |
| 2015 | 0.00456 ppb | 18 | 1 | ND - 0.0820 ppb |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 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 |
|---|---|---|
| 2014-07-14 | 4G15034-07A | ND |
| 2014-07-14 | 4G15034-05A | ND |
| 2014-07-14 | 4G15034-01A | ND |
| 2014-07-14 | 4G15034-03A | ND |
| 2014-07-14 | 4G15034-09A | ND |
| 2014-07-14 | 4G15034-11A | 2.60 ppb |
| 2014-07-15 | 4G16098-03A | ND |
| 2014-07-15 | 4G16098-11A | ND |
| 2014-07-15 | 4G16098-09A | ND |
| 2014-07-15 | 4G16098-05A | ND |
| 2014-07-15 | 4G16098-01A | 0.510 ppb |
| 2014-07-15 | 4G16098-07A | ND |
| 2014-07-15 | 4G16098-13A | ND |
| 2014-07-21 | 4G22089-01A | ND |
| 2014-07-21 | 4G22089-07A | ND |
| 2014-07-21 | 4G22089-05A | ND |
| 2014-07-21 | 4G22089-03A | ND |
| 2014-07-28 | 4G29049-01A | ND |
| 2015-01-21 | 5A22043-09A | ND |
| 2015-01-21 | 5A22043-11A | ND |
| 2015-01-21 | 5A22043-03A | ND |
| 2015-01-21 | 5A22043-07A | ND |
| 2015-01-21 | 5A22043-05A | ND |
| 2015-01-21 | 5A22043-15A | ND |
| 2015-01-21 | 5A22043-01A | ND |
| 2015-01-21 | 5A22043-13A | ND |
| 2015-01-21 | 5A22043-17A | ND |
| 2015-01-27 | 5A28031-03A | ND |
| 2015-01-27 | 5A28031-15A | ND |
| 2015-01-27 | 5A28031-01A | ND |
| 2015-01-27 | 5A28031-13A | ND |
| 2015-01-27 | 5A28031-05A | ND |
| 2015-01-27 | 5A28031-07A | ND |
| 2015-01-27 | 5A28031-09A | ND |
| 2015-01-27 | 5A28031-11A | ND |
| 2015-11-20 | 5K20077-01A | 0.0820 ppb |