Know Your Environment. Protect Your Health.

1,4-Dioxane

Rockland Mobile Home Park

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.

 

19

Samples

0

Samples exceeding legal limit (MCL)

12

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.929 ppb220.898 ppb - 0.960 ppb
2015N/A00N/A
2016N/A00N/A
2017N/A00N/A
2018N/A00N/A
20190.940 ppb110.940 ppb
20200.692 ppb550.0900 ppb - 1.04 ppb
20210.0233 ppb31ND - 0.0700 ppb
20220.180 ppb41ND - 0.720 ppb
20230.848 ppb440.820 ppb - 0.890 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
2014-02-05104861P0.960 ppb
2014-08-19108854Q0.898 ppb
2019-09-161908245-0010.940 ppb
2020-01-13467856010.700 ppb
2020-01-28478374010.710 ppb
2020-04-272004B01-001A0.0900 ppb
2020-09-152008N24-001A1.04 ppb
2020-12-082011A91-001A0.920 ppb
2021-03-302103R11-001AND
2021-06-292106U01-001A0.0700 ppb
2021-12-172111K36-001AND
2022-03-302109R21-001AND
2022-03-302203S94-001AND
2022-06-152205B98-001A0.720 ppb
2022-09-152209D73-001AND
2023-03-162303F44-001A0.850 ppb
2023-06-282306O39-001A0.890 ppb
2023-07-192307F51-001A0.820 ppb
2023-10-172310E70-001A0.830 ppb