Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

1,4-Dioxane

Prescott Valley WD Upper

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.

Click here to read more about 1,4-dioxane.

 

22

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
2014ND110ND
2015ND110ND
2016N/A00N/A
2017N/A00N/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
2014-12-08201412110346AMND
2014-12-08201412100580AMND
2014-12-08201412110324AMND
2014-12-08201412100594AMND
2014-12-08201412100582AMND
2014-12-08201412110334AMND
2014-12-08201412110322AMND
2014-12-08201412100471AMND
2014-12-08201412110257AMND
2014-12-09201412100849AMND
2014-12-10201412100788AMND
2015-06-09201506100400AMND
2015-06-09201506100383AMND
2015-06-09201506100542AMND
2015-06-09201506100464AMND
2015-06-09201506100554AMND
2015-06-09201506100537AMND
2015-06-09201506100559AMND
2015-06-09201506100569AMND
2015-06-09201506100411AMND
2015-06-09201506100544AMND
2015-06-09201506100370AMND