1,4-Dioxane
Collingwood LLC Umh Ny
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 |
|---|---|---|---|---|
| 2018 | N/A | 0 | 0 | N/A |
| 2019 | N/A | 0 | 0 | N/A |
| 2020 | N/A | 0 | 0 | N/A |
| 2021 | 0.00733 ppb | 8 | 2 | ND - 0.0326 ppb |
| 2022 | ND | 4 | 0 | ND |
| 2023 | 0.00761 ppb | 7 | 2 | ND - 0.0304 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 |
|---|---|---|
| 2021-02-24 | J1B1510-01DIOXANE | ND |
| 2021-02-24 | J1B1510-03DIOXANE | ND |
| 2021-06-29 | S1F0653-01PFA | ND |
| 2021-06-29 | S1F0654-03DIOXANE | ND |
| 2021-08-31 | R2108929-001 DIOXANE | 0.0326 ppb |
| 2021-08-31 | R2108929-002DIOXANE | 0.0260 ppb |
| 2021-12-15 | J1L0993-02DIOXANE | ND |
| 2021-12-15 | J1L0993-01DIOXANE | ND |
| 2022-04-21 | S2D0453-01PFO | ND |
| 2022-06-22 | S2F0535-01PFO | ND |
| 2022-07-26 | EHS2200035250-01DIOX | ND |
| 2022-07-26 | EHS2200035249-01DIOX | ND |
| 2023-03-28 | S3C0266-01DIOXANE | ND |
| 2023-08-01 | R2306831-001DIOX | ND |
| 2023-08-01 | R2306830-001DIOX | ND |
| 2023-10-26 | R2309931-001DIOX | 0.0229 ppb |
| 2023-10-26 | R2309932-001DIOX | ND |
| 2023-11-08 | R2310335-001DIOX | 0.0304 ppb |
| 2023-11-08 | R2310336-001DIOX | ND |