Know Your Environment. Protect Your Health.

1,4-Dioxane

South Midway City Mutual Water Company

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.

 

16

Samples

0

Samples exceeding legal limit (MCL)

16

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
20184.85 ppb444.10 ppb - 5.60 ppb
20195.06 ppb554.80 ppb - 5.50 ppb
20204.20 ppb443.80 ppb - 4.50 ppb
20215.00 ppb334.40 ppb - 5.70 ppb
2022N/A00N/A
2023N/A00N/A

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
2018-01-03CA3000825_002_002-2018010308204.70 ppb
2018-04-04CA3000825_002_002-2018040409004.10 ppb
2018-07-16CA3000825_002_002-2018071608155.60 ppb
2018-10-01CA3000825_002_002-2018100113105.00 ppb
2019-01-02CA3000825_002_002-2019010209354.80 ppb
2019-04-01CA3000825_002_002-2019040112404.80 ppb
2019-07-02CA3000825_002_002-2019070208355.00 ppb
2019-07-22CA3000825_002_002-2019072210405.20 ppb
2019-10-01CA3000825_002_002-2019100109105.50 ppb
2020-02-18CA3000825_002_002-2020021811404.40 ppb
2020-04-08CA3000825_002_002-2020040810004.10 ppb
2020-08-19CA3000825_002_002-2020081910103.80 ppb
2020-10-01CA3000825_002_002-2020100108004.50 ppb
2021-01-04CA3000825_002_002-2021010410404.40 ppb
2021-04-12CA3000825_002_002-2021041211204.90 ppb
2021-07-01CA3000825_002_002-2021070109005.70 ppb