Know Your Environment. Protect Your Health.

1,4-Dioxane

St. Nersess Armenian Seminary

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.

 

11

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
20210.589 ppb770.250 ppb - 0.960 ppb
20220.370 ppb220.200 ppb - 0.540 ppb
20230.320 ppb21ND - 0.640 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
2021-01-131.100172-PFAS0.260 ppb
2021-04-151.101022-PFAS0.320 ppb
2021-04-151.101023-PFAS0.790 ppb
2021-07-211.102065-PFAS0.960 ppb
2021-07-211.102066-PFAS0.820 ppb
2021-11-041.103292-PFAS0.250 ppb
2021-11-041.103293-PFAS0.720 ppb
2022-11-021.223060-PFAS0.200 ppb
2022-11-021.223061-PFAS0.540 ppb
2023-10-041.232488-PFASND
2023-10-041.232489-PFAS0.640 ppb