1,4-Dioxane
Newhall CWD-Newhall
NOTE: Newhall CWD-Newhall purchases water from Santa Clarita Valley W.a.-imported Divis which is required to test for 1,4-dioxane. Sample information shown below was taken by Santa Clarita Valley W.a.-imported Divis.
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 |
|---|---|---|---|---|
| 2013 | ND | 6 | 0 | ND |
| 2014 | N/A | 0 | 0 | N/A |
| 2015 | N/A | 0 | 0 | N/A |
| 2016 | N/A | 0 | 0 | N/A |
| 2017 | N/A | 0 | 0 | N/A |
| 2018 | ND | 3 | 0 | ND |
| 2019 | ND | 3 | 0 | ND |
| 2020 | ND | 3 | 0 | ND |
| 2021 | ND | 1 | 0 | ND |
| 2022 | N/A | 0 | 0 | N/A |
| 2023 | ND | 1 | 0 | ND |
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
NOTE: Newhall CWD-Newhall purchases water from Santa Clarita Valley W.a.-imported Divis which is required to test for 1,4-dioxane. Sample information shown below was taken by Santa Clarita Valley W.a.-imported Divis.
| Date | Lab ID | Result |
|---|---|---|
| 2018-07-25 | CA1910048_004_004-201807251230 | ND |
| 2018-07-25 | CA1910048_005_005-201807251310 | ND |
| 2018-07-25 | CA1910048_006_006-201807251350 | ND |
| 2019-07-31 | CA1910048_006_006-201907311125 | ND |
| 2019-07-31 | CA1910048_004_004-201907311000 | ND |
| 2019-07-31 | CA1910048_005_005-201907311040 | ND |
| 2020-09-02 | CA1910048_005_005-202009021035 | ND |
| 2020-09-02 | CA1910048_004_004-202009020950 | ND |
| 2020-09-02 | CA1910048_006_006-202009021345 | ND |
| 2021-07-22 | CA1910048_006_006-202107220930 | ND |
| 2023-08-03 | CA1910048_005_005-202308030745 | ND |