1,4-Dioxane
Bella Vista City 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 | ND | 6 | 0 | ND |
| 2015 | 0.0229 ppb | 24 | 4 | ND - 0.210 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 |
|---|---|---|
| 2014-07-10 | 3061522 | ND |
| 2014-07-10 | 3061536 | ND |
| 2014-07-10 | 3061509 | ND |
| 2014-07-10 | 3061584 | ND |
| 2014-07-10 | 3061558 | ND |
| 2014-07-10 | 3061571 | ND |
| 2015-01-21 | 3174457 | ND |
| 2015-01-21 | 3174431 | ND |
| 2015-01-21 | 3174477 | ND |
| 2015-01-21 | 3174108 | ND |
| 2015-01-21 | 3174098 | 0.0800 ppb |
| 2015-01-21 | 3174381 | ND |
| 2015-01-21 | 3174062 | ND |
| 2015-01-21 | 3174419 | ND |
| 2015-01-21 | 3174445 | ND |
| 2015-01-21 | 3174117 | ND |
| 2015-01-21 | 3174398 | 0.160 ppb |
| 2015-01-21 | 3174468 | ND |
| 2015-01-21 | 3174510 | ND |
| 2015-01-21 | 3174089 | ND |
| 2015-01-21 | 3174080 | ND |
| 2015-07-14 | 3280381 | ND |
| 2015-07-14 | 3280644 | 0.1000 ppb |
| 2015-07-14 | 3280222 | ND |
| 2015-07-14 | 3280235 | ND |
| 2015-07-14 | 3280453 | ND |
| 2015-07-14 | 3281555 | ND |
| 2015-07-14 | 3280303 | ND |
| 2015-07-14 | 3280253 | 0.210 ppb |
| 2015-07-14 | 3280352 | ND |