Know Your Environment. Protect Your Health.

1,4-Dioxane

Candlewood Park Water District

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.

 

15

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
2020ND20ND
2021ND80ND
20220.00800 ppb31ND - 0.0240 ppb
20230.1000 ppb21ND - 0.200 ppb

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
2020-11-03420-184418-4-PFASND
2020-11-17420-185507-1-PFASND
2021-02-16L2107750-01-PFASND
2021-02-16L2107750-03-PFASND
2021-05-05L2123478-01-PFASND
2021-05-05L2123478-03-PFASND
2021-08-31L2147014-01-PFASND
2021-08-31L2147014-03-PFASND
2021-11-17L2163681-02-PFASND
2021-11-17L2163681-PFASND
2022-05-3122F0195-01-PFAS0.0240 ppb
2022-05-3122F0195-03-PFASND
2022-08-09420-231874-1-PFASND
2023-04-12CN82716-PFAS0.200 ppb
2023-07-19CO54708-PFASND