Know Your Environment. Protect Your Health.

1,4-Dioxane

Bellflower Municipal Water System

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.

 

24

Samples

0

Samples exceeding legal limit (MCL)

24

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20182.15 ppb441.90 ppb - 2.40 ppb
20192.28 ppb441.90 ppb - 2.80 ppb
20202.33 ppb442.20 ppb - 2.50 ppb
20212.00 ppb441.80 ppb - 2.20 ppb
20222.23 ppb442.00 ppb - 2.40 ppb
20231.80 ppb441.60 ppb - 2.00 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
2018-01-09CA1910018_028_028-2018010911002.30 ppb
2018-04-16CA1910018_028_028-2018041609201.90 ppb
2018-07-26CA1910018_028_028-2018072610502.40 ppb
2018-10-29CA1910018_028_028-2018102910252.00 ppb
2019-01-16CA1910018_028_028-2019011611202.80 ppb
2019-04-16CA1910018_028_028-2019041609151.90 ppb
2019-09-16CA1910018_028_028-2019091609352.10 ppb
2019-11-14CA1910018_028_028-2019111410052.30 ppb
2020-01-30CA1910018_028_028-2020013010142.20 ppb
2020-05-27CA1910018_028_028-2020052710042.30 ppb
2020-07-30CA1910018_028_028-2020073010022.50 ppb
2020-11-19CA1910018_028_028-2020111909162.30 ppb
2021-01-25CA1910018_028_028-2021012510072.10 ppb
2021-04-19CA1910018_028_028-2021041909381.90 ppb
2021-07-28CA1910018_028_028-2021072809161.80 ppb
2021-10-27CA1910018_028_028-2021102709302.20 ppb
2022-01-26CA1910018_028_028-2022012609372.40 ppb
2022-04-25CA1910018_028_028-2022042510452.00 ppb
2022-07-25CA1910018_028_028-2022072510502.30 ppb
2022-10-17CA1910018_028_028-2022101710442.20 ppb
2023-01-26CA1910018_028_028-2023012609041.80 ppb
2023-04-17CA1910018_028_028-2023041709402.00 ppb
2023-07-24CA1910018_028_028-2023072409441.60 ppb
2023-10-17CA1910018_028_028-2023101709081.80 ppb