Know Your Environment. Protect Your Health.

1,4-Dioxane

Bonney Lake Water Department

NOTE: Bonney Lake Water Department purchases water from City of Tacoma which is required to test for 1,4-dioxane. Sample information shown below was taken by City of Tacoma.

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.

 

21

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013ND60ND
2014ND60ND
2015ND200ND
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

NOTE: Bonney Lake Water Department purchases water from City of Tacoma which is required to test for 1,4-dioxane. Sample information shown below was taken by City of Tacoma.

Date Lab ID Result
2014-08-06201408070493AMND
2015-03-10201503110935AMND
2015-03-10201503120179AMND
2015-03-10201502170548AMND
2015-06-09201505060001AMND
2015-06-17201505060005AMND
2015-06-29201505020034AMND
2015-07-06201505020035AMND
2015-07-08201507090318AMND
2015-07-09201506300092AMND
2015-07-09201507100395AMND
2015-08-19201508200778AMND
2015-09-09201508050009AMND
2015-09-09201508050013AMND
2015-10-13201509250020AMND
2015-12-01201511130086AMND
2015-12-02201511130082AMND
2015-12-07201511130099AMND
2015-12-07201511130096AMND
2015-12-08201511130098AMND
2015-12-08201511130097AMND