Know Your Environment. Protect Your Health.

1,4-Dioxane

Horsham Water&sewer Authority

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
20140.0660 ppb3213ND - 0.570 ppb
2015ND20ND
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021N/A00N/A
2022N/A00N/A
2023N/A00N/A

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2014-06-24201406260467AM0.120 ppb
2014-06-24201406260370AMND
2014-06-24201406260436AMND
2014-06-24201406260448AM0.570 ppb
2014-06-24201406260452AM0.110 ppb
2014-06-24201406260446AMND
2014-06-24201406260444AMND
2014-06-24201406260469AMND
2014-06-25201406270329AMND
2014-06-25201406270395AMND
2014-06-25201406270399AM0.160 ppb
2014-06-25201406270331AMND
2014-07-03201407090718AMND
2014-07-11201407150382AMND
2014-07-11201407150391AM0.140 ppb
2014-07-24201407290118AM0.0860 ppb
2014-09-24201409270176AMND
2014-09-24201409270174AM0.120 ppb
2014-12-05201412090618AM0.0760 ppb
2014-12-08201412090349AMND
2014-12-08201412090620AM0.0940 ppb
2014-12-08201412090368AMND
2014-12-09201412120375AMND
2014-12-09201412120387AM0.0850 ppb
2014-12-09201412120378AM0.160 ppb
2014-12-10201412120275AM0.150 ppb
2014-12-10201412120280AMND
2014-12-10201412120285AMND
2014-12-12201412160291AMND
2014-12-12201412160303AMND
2014-12-12201412160297AMND
2014-12-12201412160287AM0.240 ppb
2015-03-19201503210033AMND
2015-03-19201503210035AMND