Know Your Environment. Protect Your Health.

1,4-Dioxane

Kent Water District 1

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
2018N/A00N/A
2019N/A00N/A
2020ND10ND
20210.148 ppb65ND - 0.240 ppb
2022ND90ND
2023ND60ND

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
2020-10-15CG97560ND
2021-04-13CH98150PFO0.210 ppb
2021-04-21CH99466PFO0.210 ppb
2021-05-06CI25412PFOA0.230 ppb
2021-09-17CJ31770ND
2021-11-30CJ881910.240 ppb
2021-11-30CJ881920.000200 ppb
2022-03-18CK88130PFOND
2022-05-09CL28454ND
2022-05-09CL28453ND
2022-06-06CL51649ND
2022-06-06CL51650ND
2022-08-08CM01023ND
2022-08-08CM01022ND
2022-12-06CM98165ND
2022-12-06CM98166ND
2023-02-20CN47644ND
2023-02-20CN47643ND
2023-05-22CO08298PFOND
2023-05-22CO08297PFOND
2023-07-18CO53322PFOND
2023-07-18CO53323PFOND