1,4-Dioxane
City of Lodi
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 | ND | 27 | 0 | ND |
| 2015 | ND | 27 | 0 | ND |
| 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 |
|---|---|---|
| 2014-09-17 | A4H2768-01A | ND |
| 2014-09-17 | A4H2768-12A | ND |
| 2014-09-17 | A4H2772-11A | ND |
| 2014-09-17 | A4H2768-15A | ND |
| 2014-09-17 | A4H2770-06A | ND |
| 2014-09-17 | A4H2770-14A | ND |
| 2014-09-17 | A4H2772-03A | ND |
| 2014-09-17 | A4H2768-09A | ND |
| 2014-09-17 | A4H2772-14A | ND |
| 2014-09-17 | A4H2768-04A | ND |
| 2014-09-17 | A4H2770-03A | ND |
| 2014-09-17 | A4H2772-08A | ND |
| 2014-09-18 | A4H2775-01A | ND |
| 2014-09-18 | A4H2779-01A | ND |
| 2014-09-18 | A4H2775-04A | ND |
| 2014-09-18 | A4H2777-01A | ND |
| 2014-09-18 | A4H2777-10A | ND |
| 2014-09-18 | A4H2777-04A | ND |
| 2014-09-18 | A4H2779-04A | ND |
| 2014-09-18 | A4H2779-07A | ND |
| 2014-09-18 | A4H2779-15A | ND |
| 2014-09-18 | A4H2775-10A | ND |
| 2014-09-18 | A4H2775-13A | ND |
| 2014-09-18 | A4H2777-07A | ND |
| 2014-09-18 | A4H2779-10A | ND |
| 2014-09-18 | A4H2775-07A | ND |
| 2014-12-10 | A4K1202-01A | ND |
| 2015-03-18 | A5B2003-10A | ND |
| 2015-03-18 | A5B2007-03A | ND |
| 2015-03-18 | A5B2003-04A | ND |
| 2015-03-18 | A5B2020-14A | ND |
| 2015-03-18 | A5B2020-08A | ND |
| 2015-03-18 | A5B2007-11A | ND |
| 2015-03-18 | A5B2003-07A | ND |
| 2015-03-18 | A5B2020-03A | ND |
| 2015-03-18 | A5B2003-01A | ND |
| 2015-03-18 | A5B2001-01A | ND |
| 2015-03-18 | A5B2007-06A | ND |
| 2015-03-18 | A5B2020-11A | ND |
| 2015-03-19 | A5B2026-01A | ND |
| 2015-03-19 | A5B2042-15A | ND |
| 2015-03-19 | A5B2042-01A | ND |
| 2015-03-19 | A5B2026-13A | ND |
| 2015-03-19 | A5B2042-07A | ND |
| 2015-03-19 | A5B2026-10A | ND |
| 2015-03-19 | A5B2042-10A | ND |
| 2015-03-19 | A5B2035-04A | ND |
| 2015-03-19 | A5B2042-04A | ND |
| 2015-03-19 | A5B2035-07A | ND |
| 2015-03-19 | A5B2035-01A | ND |
| 2015-03-19 | A5B2035-10A | ND |
| 2015-03-19 | A5B2026-04A | ND |
| 2015-03-19 | A5B2026-07A | ND |
| 2015-06-11 | A5E1718-01A | ND |