Know Your Environment. Protect Your Health.

1,4-Dioxane

Old Westbury

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.

 

59

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018N/A00N/A
20190.0197 ppb63ND - 0.0440 ppb
20200.0270 ppb2012ND - 0.0610 ppb
20210.0367 ppb119ND - 0.0670 ppb
20220.0452 ppb1110ND - 0.0780 ppb
20230.0497 ppb1110ND - 0.0810 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
2019-11-1270111490001ND
2019-11-12701114900020.0380 ppb
2019-11-1370111650001ND
2019-11-13701116500020.0440 ppb
2019-11-1470111791001ND
2019-11-14701117910020.0360 ppb
2020-02-04701203420020.0440 ppb
2020-02-05701206510010.0460 ppb
2020-02-1170121351001ND
2020-02-18701221510010.0470 ppb
2020-02-2470122752001ND
2020-04-1470128026001ND
2020-04-16701282270010.0480 ppb
2020-04-2770129218001ND
2020-04-29701294200010.0470 ppb
2020-05-0470129805001ND
2020-05-04701298050030.0550 ppb
2020-08-2570143187001ND
2020-08-25701431870020.0440 ppb
2020-09-08701449450010.0250 ppb
2020-09-09701451430010.0430 ppb
2020-09-1470145712001ND
2020-09-2170146589001ND
2020-11-04701520670020.0240 ppb
2020-11-10701528770010.0560 ppb
2020-12-02701552320010.0610 ppb
2021-01-21701601270020.0610 ppb
2021-01-2570160381001ND
2021-05-05701716260020.0670 ppb
2021-05-12701726800010.0390 ppb
2021-05-26701745180010.0270 ppb
2021-08-11701836440020.0370 ppb
2021-08-1870184479001ND
2021-08-25701852230020.0580 ppb
2021-11-10701942920010.0220 ppb
2021-11-16701948980010.0600 ppb
2021-12-22701988980010.0330 ppb
2022-02-09702034870010.0780 ppb
2022-02-1570204181001ND
2022-03-09702068840010.0500 ppb
2022-04-2770212478001-POCS0.0440 ppb
2022-05-0470213403001-POCS0.0310 ppb
2022-05-25702159520020.0620 ppb
2022-08-17702262500010.0220 ppb
2022-08-24702270040010.0410 ppb
2022-11-1470236636001-PFAS0.0710 ppb
2022-11-1670237103001-PFAS0.0630 ppb
2022-12-2170240933001-PFAS0.0350 ppb
2023-02-0870245579001-PFAS0.0440 ppb
2023-02-15702464190010.0810 ppb
2023-02-22702471190010.0520 ppb
2023-04-19702533840020.0720 ppb
2023-05-03702549280020.0250 ppb
2023-05-10702558200010.0530 ppb
2023-08-16702671490050.0470 ppb
2023-08-1770267372001ND
2023-11-0170276064002-PRI0.0710 ppb
2023-11-0870276911002-PRI0.0630 ppb
2023-11-29702790390020.0390 ppb