Know Your Environment. Protect Your Health.

1,4-Dioxane

North Castle Water District #2

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.

 

41

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
2020N/A00N/A
2021ND120ND
2022ND120ND
2023ND170ND

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
2021-06-22L213400404-PFASND
2021-06-22L213400403-PFASND
2021-06-22L213400402-PFASND
2021-06-22L213400401-PFASND
2021-08-23L214531203-PFASND
2021-08-23L214531202-PFASND
2021-08-23L214531201-PFASND
2021-08-24L214531205-PFASND
2021-12-28L217128703-PFASND
2021-12-28L217128704-PFASND
2021-12-28L217128701-PFASND
2021-12-28L217128702-PFASND
2022-03-29L221626001-PFASND
2022-03-29L221626003-PFASND
2022-03-29L221626005-PFASND
2022-03-29L221626004-PFASND
2022-09-28L2253716-02-PFASND
2022-09-28L2253716-01-PFASND
2022-09-28L2253716-03-PFASND
2022-09-28L2253716-04-PFASND
2022-12-01L2267398-04-PFASND
2022-12-01L2267398-02-PFASND
2022-12-01L2267398-03-PFASND
2022-12-01L2267398-01-PFASND
2023-02-16L2308675-01-PFASND
2023-02-16L2308675-04-PFASND
2023-02-16L2308675-02-PFASND
2023-02-16L2308675-03-PFASND
2023-05-04L2324681-05-PFASND
2023-05-04L2324681-04-PFASND
2023-05-17L2324681-03-PFASND
2023-05-17L2324681-02-PFASND
2023-05-17L2324681-01-PFASND
2023-08-15L2347438-03-PFASND
2023-08-15L2347438-04-PFASND
2023-08-15L2347438-01-PFASND
2023-08-15L2347438-02-PFASND
2023-10-31L2364496-04-PFASND
2023-10-31L2364496-02-PFASND
2023-10-31L2364496-03-PFASND
2023-10-31L2364496-01-1,4-DIOXND