Know Your Environment. Protect Your Health.

1,4-Dioxane

Carmel Water District 3

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.

 

25

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
2019N/A00N/A
2020N/A00N/A
2021ND20ND
20220.0662 ppb131ND - 0.860 ppb
2023ND100ND

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
2021-05-19CI35142ND
2021-07-07CI69415ND
2022-04-27CL17972ND
2022-07-06CL71012ND
2022-07-06CL71014ND
2022-07-27CL90397ND
2022-10-05CM50196ND
2022-10-05CM50201ND
2022-10-05CM50203ND
2022-10-05CM50198ND
2022-10-05CM50197ND
2022-10-19CM66326ND
2022-10-19CM66325ND
2022-10-19CM66324ND
2022-11-01CM746820.860 ppb
2023-01-11CN21618ND
2023-01-11CN21616ND
2023-01-25CN30096ND
2023-05-17CO02886PFOND
2023-05-17CO02888PFOND
2023-05-31CO13337PFOND
2023-06-01CO13339ND
2023-08-09CO70650PFOND
2023-08-17CO70648PFOND
2023-09-06CO91842PFOND