1,4-Dioxane
Brookwood Comm. 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.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.129 ppb | 40 | 31 | ND - 0.360 ppb |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/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 |
|---|---|---|
| 2014-02-05 | 201402060270AM | 0.110 ppb |
| 2014-02-05 | 201402060255AM | 0.180 ppb |
| 2014-02-05 | 201402060239AM | 0.170 ppb |
| 2014-02-05 | 201402060232AM | ND |
| 2014-02-05 | 201402060422AM | ND |
| 2014-02-06 | 201402070207AM | 0.120 ppb |
| 2014-02-06 | 201402070241AM | 0.220 ppb |
| 2014-02-06 | 201402070213AM | ND |
| 2014-02-06 | 201402070205AM | 0.170 ppb |
| 2014-02-24 | 201402250230AM | 0.0970 ppb |
| 2014-02-24 | 201402250329AM | ND |
| 2014-02-24 | 201402250338AM | 0.140 ppb |
| 2014-02-24 | 201402250217AM | 0.200 ppb |
| 2014-02-24 | 201402250336AM | 0.150 ppb |
| 2014-02-24 | 201402250190AM | 0.150 ppb |
| 2014-02-24 | 201402250194AM | 0.230 ppb |
| 2014-02-24 | 201402250219AM | 0.110 ppb |
| 2014-02-25 | 201402260616AM | 0.0760 ppb |
| 2014-02-25 | 201402260692AM | 0.200 ppb |
| 2014-02-25 | 201402260636AM | 0.350 ppb |
| 2014-08-12 | 201408130303AM | 0.200 ppb |
| 2014-08-12 | 201408130473AM | 0.160 ppb |
| 2014-08-12 | 201408130653AM | 0.0850 ppb |
| 2014-08-12 | 201408130463AM | 0.130 ppb |
| 2014-08-14 | 201408150255AM | 0.110 ppb |
| 2014-08-14 | 201408150324AM | ND |
| 2014-08-14 | 201408150398AM | ND |
| 2014-08-14 | 201408150202AM | ND |
| 2014-08-18 | 201408190536AM | 0.0790 ppb |
| 2014-08-18 | 201408190655AM | 0.200 ppb |
| 2014-08-18 | 201408190671AM | 0.140 ppb |
| 2014-08-18 | 201408190691AM | 0.290 ppb |
| 2014-08-18 | 201408190657AM | 0.360 ppb |
| 2014-08-18 | 201408190661AM | 0.180 ppb |
| 2014-08-26 | 201408270815AM | ND |
| 2014-08-26 | 201408270818AM | 0.220 ppb |
| 2014-08-26 | 201408270830AM | ND |
| 2014-08-26 | 201408270834AM | 0.110 ppb |
| 2014-08-27 | 201408280801AM | 0.110 ppb |
| 2014-08-27 | 201408280737AM | 0.120 ppb |