Know Your Environment. Protect Your Health.

1,4-Dioxane

North Castle Water District #4

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
2021-06-22L213400904-PFASND
2021-06-22L213400903-PFASND
2021-06-22L213400902-PFASND
2021-06-22L213400901-PFASND
2021-08-10L214312301-PFASND
2021-08-10L214312302-PFASND
2021-08-11L214313403-PFASND
2021-08-11L214313405-PFASND
2021-12-28L217129602-PFASND
2021-12-28L217129104-PFASND
2021-12-28L217129101-PFASND
2021-12-28L217129603-PFASND
2022-03-29L221627006-PFASND
2022-03-29L221627005-PFASND
2022-03-29L221627001-PFASND
2022-03-29L221627003-PFASND
2022-09-28L2253737-04-PFASND
2022-09-28L2253737-01-PFASND
2022-09-28L2253737-02-PFASND
2022-09-28L2253737-03-PFASND
2022-12-01L2267398-09-PFASND
2022-12-01L2267398-08-PFASND
2022-12-01L2267398-07-PFASND
2022-12-01L2267398-10-PFASND
2023-02-16L2308678-01-PFASND
2023-02-16L2308678-02-PFASND
2023-02-16L2308678-05-PFASND
2023-02-16L2308678-04-PFASND
2023-02-16L2308678-03-PFASND
2023-05-04L2324575-02-PFASND
2023-05-04L2324575-04-PFASND
2023-05-04L2324575-01-PFASND
2023-05-04L2324575-03-PFASND
2023-08-15L2347441-04-PFASND
2023-08-15L2347441-01-PFASND
2023-08-15L2347441-03-PFASND
2023-08-15L2347441-02-PFASND
2023-10-31L2364493-03-PFASND
2023-10-31L2364493-02-PFASND
2023-10-31L2364493-04-PFASND
2023-10-31L2364493-01-PFASND