Know Your Environment. Protect Your Health.

1,4-Dioxane

San Gabriel Valley Water Company-Montebello

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.

 

0

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.255 ppb10100.0710 ppb - 0.590 ppb
20150.239 ppb107ND - 0.630 ppb
2016N/A00N/A
2017N/A00N/A
20180.228 ppb46162ND - 2.20 ppb
20190.225 ppb43855ND - 2.10 ppb
20200.230 ppb40949ND - 2.30 ppb
20210.299 ppb449136ND - 2.60 ppb
20220.495 ppb525435ND - 2.80 ppb
20230.459 ppb510451ND - 2.50 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