1,4-Dioxane
City of Huntington Beach
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 | 4 | 0 | ND |
| 2014 | 0.291 ppb | 30 | 12 | ND - 1.40 ppb |
| 2015 | ND | 12 | 0 | ND |
| 2016 | 0.188 ppb | 16 | 2 | ND - 1.90 ppb |
| 2017 | 0.721 ppb | 24 | 8 | ND - 3.30 ppb |
| 2018 | 0.250 ppb | 16 | 3 | ND - 1.40 ppb |
| 2019 | 0.247 ppb | 17 | 3 | ND - 1.60 ppb |
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 |
|---|---|---|
| 2013-03-04 | 3010053815 | ND |
| 2013-06-10 | 3010053815-2 | ND |
| 2013-09-03 | 3010053815-3 | ND |
| 2013-12-09 | 3010053815-4 | ND |
| 2014-02-12 | 4417-009-0815 | ND |
| 2014-02-12 | 4417-010-0925 | ND |
| 2014-02-12 | 4417-011-1020 | ND |
| 2014-02-12 | 4417-013-0850 | ND |
| 2014-04-17 | 3010053805-1 | ND |
| 2014-04-17 | 3010053807-1 | 0.672 ppb |
| 2014-04-17 | 3010053806-1 | ND |
| 2014-04-17 | 3010053802-1 | ND |
| 2014-04-17 | 3010053804-1 | 1.05 ppb |
| 2014-04-17 | 3010053803-1 | 0.349 ppb |
| 2014-04-17 | 3010053808-1 | 0.252 ppb |
| 2014-04-17 | 3010053809-1 | ND |
| 2014-05-06 | 4417-009-0850 | ND |
| 2014-05-06 | 4417-013-1000 | 1.40 ppb |
| 2014-05-06 | 4417-016-0920 | ND |
| 2014-08-06 | 4417-008-1010 | ND |
| 2014-08-06 | 4417-009-0830 | ND |
| 2014-08-06 | 4417-012-0805 | ND |
| 2014-08-06 | 4417-013-0910 | 1.20 ppb |
| 2014-08-06 | 4417-025-1025 | ND |
| 2014-09-02 | 4417-011-0935 | ND |
| 2014-09-17 | 14090523 | ND |
| 2014-09-17 | 14090524 | 0.111 ppb |
| 2014-09-17 | 14090522 | 0.540 ppb |
| 2014-09-17 | 14090519 | 0.410 ppb |
| 2014-09-17 | 14090526 | ND |
| 2014-09-17 | 14090525 | 1.18 ppb |
| 2014-09-17 | 14090520 | ND |
| 2014-09-17 | 14090521 | 0.280 ppb |
| 2014-11-12 | 4417-013-0935 | 1.30 ppb |
| 2015-02-18 | 4417-010-0950 | ND |
| 2015-02-18 | 4417-011-1025 | ND |
| 2015-02-18 | 4417-013-0920 | ND |
| 2015-05-05 | 4417-009-0840 | ND |
| 2015-05-05 | 4417-013-0950 | ND |
| 2015-05-05 | 4417-016-0920 | ND |
| 2015-07-30 | 4417-008-0920 | ND |
| 2015-07-30 | 4417-011-0940 | ND |
| 2015-07-30 | 4417-012-1040 | ND |
| 2015-07-30 | 4417-013-1110 | ND |
| 2015-07-30 | 4417-025-0905 | ND |
| 2015-11-16 | 4417-013-0920 | ND |
| 2016-02-02 | 4417-010-1115 | ND |
| 2016-02-02 | 4417-011-1010 | ND |
| 2016-02-02 | 4417-012-0805 | ND |
| 2016-02-02 | 4417-013-0935 | 1.10 ppb |
| 2016-05-03 | 4417-008-1020 | ND |
| 2016-05-03 | 4417-013-0920 | ND |
| 2016-05-03 | 4417-016-0850 | ND |
| 2016-07-28 | 4417-008-1020 | ND |
| 2016-07-28 | 4417-013-0910 | ND |
| 2016-07-28 | 4417-025-1045 | ND |
| 2016-08-17 | 4417-011-0830 | ND |
| 2016-09-14 | 4417-009-1100 | ND |
| 2016-09-22 | 4417-009-0840 | ND |
| 2016-10-17 | 4417-008-0850 | ND |
| 2016-10-17 | 4417-009-0810 | ND |
| 2016-11-08 | 4417-013-0855 | 1.90 ppb |
| 2017-02-16 | 4417-009-0905 | ND |
| 2017-02-16 | 4417-010-0950 | ND |
| 2017-02-16 | 4417-011-1020 | ND |
| 2017-02-16 | 4417-012-0925 | ND |
| 2017-02-16 | 4417-013-1105 | 2.40 ppb |
| 2017-02-16 | 4417-025-1045 | ND |
| 2017-04-19 | 4417-012-0850 | ND |
| 2017-04-19 | 4417-012-0935 | ND |
| 2017-04-19 | 4417-013-1000 | 3.30 ppb |
| 2017-05-17 | 4417-009-0830 | ND |
| 2017-05-17 | 4417-010-0945 | ND |
| 2017-05-17 | 4417-013-0915 | 1.40 ppb |
| 2017-05-17 | 4417-013-0930 | 1.20 ppb |
| 2017-05-17 | 4417-016-0850 | ND |
| 2017-05-24 | 4417-016-0945 | ND |
| 2017-08-02 | 4417-009-0815 | ND |
| 2017-08-02 | 4417-011-0855 | ND |
| 2017-08-17 | 4417-013-0850 | 2.70 ppb |
| 2017-08-17 | 4417-025-0935 | ND |
| 2017-09-19 | 4417-008-0900 | ND |
| 2017-09-20 | 4417-013-0900 | 2.30 ppb |
| 2017-09-20 | 4417-013-0910 | 2.30 ppb |
| 2017-11-08 | 4417-009-0820 | ND |
| 2017-11-15 | 4417-013-0930 | 1.70 ppb |
| 2018-01-24 | 4417-009-1000 | ND |
| 2018-01-24 | 4417-013-1100 | ND |
| 2018-01-24 | 4417-016-1040 | ND |
| 2018-02-14 | 4417-025-0840 | ND |
| 2018-05-01 | 4417-008-1115 | ND |
| 2018-05-01 | 4417-009-1000 | ND |
| 2018-05-01 | 4417-010-1020 | ND |
| 2018-05-01 | 4417-013-0930 | 1.30 ppb |
| 2018-05-01 | 4417-016-0945 | ND |
| 2018-06-07 | 4417-011-0820 | ND |
| 2018-07-31 | 4417-013-1005 | 1.30 ppb |
| 2018-07-31 | 4417-025-0850 | ND |
| 2018-08-07 | 4417-009-0800 | ND |
| 2018-08-07 | 4417-011-0835 | ND |
| 2018-10-23 | 4417-009-0905 | ND |
| 2018-10-23 | 4417-013-0835 | 1.40 ppb |
| 2019-01-16 | 4417-008-0920 | ND |
| 2019-01-16 | 4417-010-1025 | ND |
| 2019-01-16 | 4417-011-0835 | ND |
| 2019-01-16 | 4417-012-1000 | ND |
| 2019-01-16 | 4417-013-0730 | 1.10 ppb |
| 2019-01-16 | 4417-016-0805 | ND |
| 2019-01-16 | 4417-025-0900 | ND |
| 2019-02-07 | 4417-009-0800 | ND |
| 2019-04-09 | 4417-009-0900 | ND |
| 2019-04-18 | 4417-012-0905 | ND |
| 2019-07-01 | 4417-009-0835 | ND |
| 2019-07-01 | 4417-011-1010 | ND |
| 2019-07-01 | 4417-013-0910 | 1.60 ppb |
| 2019-07-01 | 4417-025-0955 | ND |
| 2019-10-01 | 4417-009-1035 | ND |
| 2019-10-01 | 4417-013-0955 | 1.50 ppb |
| 2019-10-01 | 4417-025-1100 | ND |