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EWG's Tap Water Database — 2019 UPDATE

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1,4-Dioxane

NJ American Water - Western

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.

 

34

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20130.0555 ppb337ND - 0.390 ppb
2014ND10ND
2015N/A00N/A
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
2013-05-0121871901ND
2013-05-0121873501ND
2013-05-0221872301ND
2013-05-0221872901ND
2013-05-0621874301ND
2013-05-0821872501ND
2013-05-0821873301ND
2013-05-0921873701ND
2013-05-13218727010.210 ppb
2013-05-13218739010.290 ppb
2013-05-16218721010.290 ppb
2013-06-0621875101ND
2013-06-1721874501ND
2013-06-1921871701ND
2013-07-01218749010.0700 ppb
2013-07-2421874701ND
2013-08-1923160401ND
2013-08-2323490801ND
2013-08-2323490401ND
2013-08-2323491001ND
2013-08-3023490601ND
2013-09-0623490201ND
2013-10-1123875801ND
2013-11-0423876001ND
2013-11-0423874401ND
2013-11-0423876601ND
2013-11-0623874801ND
2013-11-0623875001ND
2013-11-0623876201ND
2013-11-08238752010.310 ppb
2013-11-08238764010.270 ppb
2013-11-0823875601ND
2013-11-13238733010.390 ppb
2014-02-0524727501ND