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EWG's Tap Water Database — 2019 UPDATE

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1,4-Dioxane

Sacramento Suburban Water District

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.

 

112

Samples

0

Samples exceeding legal limit (MCL)

1

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013N/A00N/A
20140.0144 ppb1029ND - 0.450 ppb
20150.0360 ppb103ND - 0.130 ppb
2016N/A00N/A
2017N/A00N/A

ppb = parts per billion

State and national drinking water standards and health guidelines

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
2014-02-03201402040279AMND
2014-02-03201402040304AMND
2014-02-03201402040297AMND
2014-02-03201402040295AMND
2014-02-03201402040281AM0.450 ppb
2014-02-03201402040306AMND
2014-02-03201402040318AMND
2014-02-03201402040291AM0.0970 ppb
2014-02-03201402040293AMND
2014-02-05201402060280AMND
2014-02-05201402060399AMND
2014-02-05201402060308AMND
2014-02-05201402060405AM0.0720 ppb
2014-02-05201402060420AMND
2014-02-05201402060266AMND
2014-02-05201402060274AM0.110 ppb
2014-02-05201402060278AMND
2014-02-05201402060272AMND
2014-02-06201402070345AMND
2014-02-06201402070361AMND
2014-02-06201402070249AMND
2014-02-06201402070239AMND
2014-02-06201402070215AMND
2014-02-06201402070300AMND
2014-02-06201402070359AMND
2014-02-06201402070341AMND
2014-02-06201402070305AMND
2014-02-10201402110089AMND
2014-02-10201402110101AMND
2014-02-10201402110095AMND
2014-02-10201402110087AMND
2014-02-10201402110105AMND
2014-02-10201402110091AMND
2014-02-10201402110103AMND
2014-02-13201402140361AMND
2014-02-13201402140329AMND
2014-02-13201402140357AMND
2014-02-13201402140274AMND
2014-02-13201402140375AMND
2014-02-13201402140377AMND
2014-02-13201402140359AMND
2014-02-13201402140276AMND
2014-02-13201402140326AMND
2014-02-13201402140278AMND
2014-02-13201402140272AMND
2014-02-13201402140363AMND
2014-02-13201402140353AMND
2014-02-20201402210319AMND
2014-02-20201402210275AMND
2014-05-15201405160286AMND
2014-05-15201405160276AMND
2014-08-06201408070210AMND
2014-08-06201408070333AMND
2014-08-06201408070292AMND
2014-08-06201408070315AMND
2014-08-07201408080159AMND
2014-08-07201408080165AMND
2014-08-07201408080171AM0.0750 ppb
2014-08-07201408080169AM0.0950 ppb
2014-08-11201408120095AMND
2014-08-11201408120164AMND
2014-08-11201408120131AMND
2014-08-11201408120343AMND
2014-08-11201408120123AM0.110 ppb
2014-08-11201408120093AMND
2014-08-11201408120099AMND
2014-08-11201408120097AMND
2014-08-11201408120256AMND
2014-08-13201408140165AMND
2014-08-13201408140171AMND
2014-08-13201408140178AMND
2014-08-13201408140158AMND
2014-08-13201408140155AMND
2014-08-13201408140167AMND
2014-08-13201408140162AMND
2014-08-13201408140153AMND
2014-08-13201408140176AMND
2014-08-14201408150234AM0.290 ppb
2014-08-14201408150161AMND
2014-08-14201408150154AMND
2014-08-14201408150210AMND
2014-08-14201408150152AMND
2014-08-14201408150148AMND
2014-08-14201408150238AMND
2014-08-14201408150150AMND
2014-08-14201408150163AMND
2014-08-20201408210294AMND
2014-08-20201408210251AMND
2014-08-20201408210283AM0.170 ppb
2014-08-20201408210245AMND
2014-08-20201408210257AMND
2014-08-20201408210287AMND
2014-08-21201408220538AMND
2014-08-21201408220551AMND
2014-08-21201408220553AMND
2014-08-21201408220525AMND
2014-08-21201408220527AMND
2014-08-21201408220531AMND
2014-08-21201408220534AMND
2014-08-21201408220536AMND
2014-11-12201411140283AMND
2014-11-12201411130845AMND
2015-02-05201502060134AM0.130 ppb
2015-02-05201502060110AMND
2015-02-05201502060142AM0.110 ppb
2015-02-05201502060148AMND
2015-02-05201502060099AMND
2015-08-19201508200438AM0.120 ppb
2015-08-19201508200444AMND
2015-08-19201508200442AMND
2015-08-19201508200453AMND
2015-08-19201508200448AMND