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EWG's Tap Water Database — 2019 UPDATE

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1,4-Dioxane

Rockford

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.

 

52

Samples

0

Samples exceeding legal limit (MCL)

9

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20141.19 ppb218ND - 22.9 ppb
20150.793 ppb3110ND - 21.6 ppb
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
2014-07-08801675-11759ND
2014-07-08801412-11759ND
2014-07-08801665-11759ND
2014-07-08801679-11759ND
2014-07-08801400-117590.111 ppb
2014-07-08801669-11759ND
2014-07-08801667-117590.467 ppb
2014-07-08801685-11842ND
2014-07-08801410-117590.113 ppb
2014-07-08801392-117590.0975 ppb
2014-07-08801402-117590.436 ppb
2014-07-08801406-11759ND
2014-07-08801681-11759ND
2014-07-08801396-117590.203 ppb
2014-07-08801683-1182322.9 ppb
2014-07-08801677-117590.689 ppb
2014-07-08801414-11759ND
2014-07-08801390-11759ND
2014-07-08801398-11759ND
2014-07-08801394-11759ND
2014-07-08801404-11759ND
2015-01-08838237-13216ND
2015-01-08838233-13216ND
2015-01-08838252-13216ND
2015-01-08838220-13216ND
2015-01-08838244-132160.746 ppb
2015-01-08838248-132160.131 ppb
2015-01-08838208-13216ND
2015-01-08838250-132160.149 ppb
2015-01-08838242-132160.0973 ppb
2015-01-08838254-13222ND
2015-01-08838225-132160.511 ppb
2015-01-08838246-132160.455 ppb
2015-01-08838216-13216ND
2015-01-08838218-13216ND
2015-01-08838264-13222ND
2015-01-08838258-132220.226 ppb
2015-01-08838212-13216ND
2015-01-08838227-13216ND
2015-01-08838210-13216ND
2015-01-08838256-13222ND
2015-01-08838235-13216ND
2015-07-13870178-14510ND
2015-07-13870170-14510ND
2015-07-13870176-14510ND
2015-07-13870180-145100.496 ppb
2015-07-13870168-145100.206 ppb
2015-07-13870174-14510ND
2015-07-13870172-1451421.6 ppb
2015-09-14882884-14967ND
2015-12-09897657-15534ND
2015-12-09897655-15534ND