1,4-Dioxane
Los Angeles Department of Water and Power
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | 0.0794 ppb | 29 | 7 | ND - 0.930 ppb |
2014 | 0.256 ppb | 32 | 8 | ND - 1.30 ppb |
2015 | 0.162 ppb | 72 | 9 | ND - 1.45 ppb |
2016 | 0.0952 ppb | 77 | 6 | ND - 1.37 ppb |
2017 | 0.0964 ppb | 69 | 6 | ND - 1.27 ppb |
2018 | ND | 59 | 0 | ND |
2019 | ND | 59 | 0 | ND |
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 |
---|---|---|
2013-04-09 | AW06664 | ND |
2013-04-10 | AW06730 | 0.0880 ppb |
2013-04-10 | AW06672 | ND |
2013-04-10 | AW06676 | ND |
2013-04-10 | AW06734 | 0.0812 ppb |
2013-04-11 | AW06668 | ND |
2013-04-11 | AW06714 | ND |
2013-04-11 | AW06726 | ND |
2013-04-11 | AW06722 | ND |
2013-04-11 | AW06680 | ND |
2013-04-11 | AW06718 | ND |
2013-07-24 | AW14353 | ND |
2013-07-24 | AW14341 | ND |
2013-07-24 | AW14345 | ND |
2013-07-24 | AW14349 | 0.317 ppb |
2013-07-25 | AW14479 | ND |
2013-07-25 | AW14491 | 0.328 ppb |
2013-07-25 | AW14483 | ND |
2013-07-25 | AW14487 | ND |
2013-10-29 | AW21550 | ND |
2013-10-29 | AW21558 | ND |
2013-10-29 | AW21562 | ND |
2013-10-29 | AW21554 | ND |
2013-10-30 | AW21584 | 0.930 ppb |
2013-10-30 | AW21588 | 0.0866 ppb |
2013-10-30 | AW21580 | ND |
2013-10-30 | AW21576 | ND |
2013-10-31 | AW21566 | ND |
2013-10-31 | AW21570 | 0.473 ppb |
2014-02-05 | 1200-205-1130 | ND |
2014-03-05 | 1200-205-1140 | ND |
2014-03-18 | AX05576 | ND |
2014-03-18 | AX05572 | ND |
2014-03-18 | AX05578 | ND |
2014-03-19 | AX05666 | 0.362 ppb |
2014-03-19 | AX05670 | ND |
2014-03-19 | AX05662 | ND |
2014-03-20 | AX05768 | ND |
2014-03-20 | AX05776 | ND |
2014-03-20 | AX05772 | ND |
2014-04-09 | 1200-205-1255 | ND |
2014-05-09 | 1200-205-0915 | ND |
2014-06-04 | 1200-205-1230 | ND |
2014-06-11 | 1200-205-1050 | ND |
2014-07-09 | 1200-205-1125 | ND |
2014-07-25 | 1200-159-1050 | 1.08 ppb |
2014-08-20 | 1200-205-1030 | ND |
2014-08-26 | 1200-159-0945 | 1.04 ppb |
2014-09-03 | 1200-205-1225 | ND |
2014-10-08 | 1200-133-0900 | 1.07 ppb |
2014-10-09 | 1200-205-1125 | ND |
2014-11-04 | 1200-205-1140 | ND |
2014-11-05 | 1200-133-0830 | 1.23 ppb |
2014-11-11 | 1200-133-0630 | 1.03 ppb |
2014-11-11 | 1200-159-0905 | 1.08 ppb |
2014-12-03 | 1200-205-1120 | ND |
2014-12-04 | 1200-133-0615 | ND |
2014-12-10 | 1200-133-0640 | ND |
2014-12-18 | 1200-133-0715 | ND |
2014-12-25 | 1200-133-0655 | ND |
2014-12-31 | 1200-159-1200 | 1.30 ppb |
2015-01-01 | 1200-133-1000 | ND |
2015-01-07 | 1200-205-1205 | ND |
2015-01-08 | 1200-133-1030 | ND |
2015-01-15 | 1200-133-0930 | ND |
2015-01-22 | 1200-133-1000 | ND |
2015-01-22 | 1200-205-1125 | ND |
2015-01-26 | 1200-159-0950 | 1.28 ppb |
2015-01-29 | 1200-133-0915 | ND |
2015-02-05 | 1200-133-1030 | ND |
2015-02-05 | 1200-205-1235 | ND |
2015-02-12 | 1200-133-0625 | ND |
2015-02-19 | 1200-133-0740 | ND |
2015-02-24 | 1200-159-0940 | 1.31 ppb |
2015-02-26 | 1200-133-0745 | ND |
2015-03-04 | 1200-205-1205 | ND |
2015-03-06 | 1200-133-0620 | ND |
2015-03-12 | 1200-133-0715 | ND |
2015-03-19 | 1200-133-0755 | ND |
2015-03-26 | 1200-133-0735 | ND |
2015-04-02 | 1200-133-0640 | ND |
2015-04-08 | 1200-205-1015 | ND |
2015-04-09 | 1200-133-0715 | ND |
2015-04-16 | 1200-133-0655 | ND |
2015-04-23 | 1200-133-0705 | ND |
2015-04-30 | 1200-133-0740 | ND |
2015-05-06 | 1200-205-1130 | ND |
2015-05-07 | 1200-159-1105 | 1.45 ppb |
2015-05-14 | 1200-133-0800 | ND |
2015-05-21 | 1200-133-0830 | ND |
2015-05-28 | 1200-133-0845 | ND |
2015-06-03 | 1200-205-1205 | ND |
2015-06-04 | 1200-133-0825 | ND |
2015-06-11 | 1200-133-0820 | ND |
2015-06-17 | 1200-011-1205 | ND |
2015-06-18 | 1200-133-1256 | ND |
2015-06-19 | 1200-159-0900 | 1.37 ppb |
2015-06-25 | 1200-133-0750 | ND |
2015-07-08 | 1200-205-1130 | ND |
2015-07-16 | 1200-159-0950 | 1.23 ppb |
2015-08-04 | 1200-133-0645 | ND |
2015-08-05 | 1200-205-1240 | ND |
2015-08-06 | 1200-133-1000 | ND |
2015-08-13 | 1200-133-0945 | ND |
2015-08-20 | 1200-133-1020 | ND |
2015-08-20 | 1200-159-1000 | 1.43 ppb |
2015-08-27 | 1200-133-1210 | ND |
2015-09-03 | 1200-133-0725 | ND |
2015-09-09 | 1200-205-1235 | ND |
2015-09-10 | 1200-133-0740 | ND |
2015-09-17 | 1200-133-0745 | ND |
2015-09-24 | 1200-133-0725 | ND |
2015-09-28 | 1200-159-1000 | 1.26 ppb |
2015-10-01 | 1200-133-0725 | ND |
2015-10-06 | 1200-205-1215 | ND |
2015-10-10 | 1200-133-0950 | ND |
2015-10-15 | 1200-133-0710 | ND |
2015-10-20 | 1200-205-1155 | ND |
2015-10-22 | 1200-133-1200 | ND |
2015-10-29 | 1200-133-1130 | ND |
2015-10-30 | 1200-159-1050 | 1.14 ppb |
2015-11-04 | 1200-205-1145 | ND |
2015-11-05 | 1200-133-1100 | ND |
2015-11-12 | 1200-133-1130 | ND |
2015-11-19 | 1200-133-1045 | ND |
2015-11-26 | 1200-133-1100 | ND |
2015-11-27 | 1200-159-0930 | 1.22 ppb |
2015-12-03 | 1200-133-0700 | ND |
2015-12-09 | 1200-205-1240 | ND |
2015-12-10 | 1200-133-0650 | ND |
2015-12-17 | 1200-133-0715 | ND |
2015-12-24 | 1200-133-0705 | ND |
2015-12-31 | 1200-133-0650 | ND |
2016-01-07 | 1200-133-0810 | ND |
2016-01-07 | 1200-205-0645 | ND |
2016-01-08 | 1200-205-1100 | ND |
2016-01-13 | 1200-159-1040 | 1.15 ppb |
2016-01-14 | 1200-133-0730 | ND |
2016-01-14 | 1200-205-0910 | ND |
2016-01-21 | 1200-133-0710 | ND |
2016-01-21 | 1200-205-1145 | ND |
2016-01-28 | 1200-133-0950 | ND |
2016-01-28 | 1200-205-0900 | ND |
2016-02-04 | 1200-133-0630 | ND |
2016-02-04 | 1200-205-1120 | ND |
2016-02-11 | 1200-133-0735 | ND |
2016-02-11 | 1200-205-0750 | ND |
2016-02-18 | 1200-133-0745 | ND |
2016-02-23 | 1200-133-0730 | ND |
2016-02-27 | 1200-159-0840 | 1.37 ppb |
2016-03-01 | 1200-133-0710 | ND |
2016-03-08 | 1200-133-1320 | ND |
2016-03-09 | 1200-205-1215 | ND |
2016-03-15 | 1200-133-0810 | ND |
2016-03-23 | 1200-133-1050 | ND |
2016-03-29 | 1200-133-0820 | ND |
2016-03-29 | 1200-159-1000 | 1.21 ppb |
2016-04-05 | 1200-133-0730 | ND |
2016-04-08 | 1200-205-0900 | ND |
2016-04-12 | 1200-133-0840 | ND |
2016-04-19 | 1200-133-0715 | ND |
2016-04-19 | 1200-159-0945 | 1.31 ppb |
2016-04-26 | 1200-133-0835 | ND |
2016-05-03 | 1200-133-0745 | ND |
2016-05-10 | 1200-133-0740 | ND |
2016-05-12 | 1200-205-0840 | ND |
2016-05-17 | 1200-133-1100 | ND |
2016-05-24 | 1200-133-1205 | ND |
2016-05-26 | 1200-159-1015 | 1.23 ppb |
2016-05-31 | 1200-133-1045 | ND |
2016-06-07 | 1200-133-0930 | ND |
2016-06-07 | 1200-205-1330 | ND |
2016-06-14 | 1200-133-0815 | ND |
2016-06-22 | 1200-133-0920 | ND |
2016-06-28 | 1200-133-1000 | ND |
2016-07-06 | 1200-133-0940 | ND |
2016-07-06 | 1200-205-1305 | ND |
2016-07-12 | 1200-133-1045 | ND |
2016-07-19 | 1200-133-1045 | ND |
2016-07-21 | 1200-205-1225 | ND |
2016-07-26 | 1200-133-1125 | ND |
2016-08-02 | 1200-133-0710 | ND |
2016-08-02 | 1200-205-0735 | ND |
2016-08-09 | 1200-133-1045 | ND |
2016-08-16 | 1200-133-1045 | ND |
2016-08-23 | 1200-133-1005 | ND |
2016-08-30 | 1200-133-0825 | ND |
2016-09-06 | 1200-133-1310 | ND |
2016-09-06 | 1200-205-0725 | ND |
2016-09-13 | 1200-133-0805 | ND |
2016-09-20 | 1200-133-0820 | ND |
2016-09-27 | 1200-133-0715 | ND |
2016-10-04 | 1200-133-1300 | ND |
2016-10-04 | 1200-205-0945 | ND |
2016-10-11 | 1200-133-1220 | ND |
2016-10-18 | 1200-133-0820 | ND |
2016-10-25 | 1200-133-1030 | ND |
2016-11-01 | 1200-133-0635 | ND |
2016-11-08 | 1200-133-0845 | ND |
2016-11-08 | 1200-205-0740 | ND |
2016-11-15 | 1200-133-0830 | ND |
2016-11-22 | 1200-133-1320 | ND |
2016-11-29 | 1200-011-0845 | ND |
2016-11-29 | 1200-133-0750 | ND |
2016-11-29 | 1200-159-1005 | 1.06 ppb |
2016-12-06 | 1200-133-0730 | ND |
2016-12-06 | 1200-205-1115 | ND |
2016-12-13 | 1200-133-0725 | ND |
2016-12-20 | 1200-133-0725 | ND |
2016-12-27 | 1200-133-1000 | ND |
2017-01-03 | 1200-133-1045 | ND |
2017-01-03 | 1200-205-1040 | ND |
2017-01-10 | 1200-133-1145 | ND |
2017-01-19 | 1200-133-0735 | ND |
2017-01-24 | 1200-133-1040 | ND |
2017-01-30 | 1200-159-1015 | 1.02 ppb |
2017-01-31 | 1200-133-0815 | ND |
2017-02-07 | 1200-205-1150 | ND |
2017-02-14 | 1200-133-0730 | ND |
2017-02-16 | 1200-159-0940 | 1.27 ppb |
2017-02-24 | 1200-133-0650 | ND |
2017-02-28 | 1200-133-0715 | ND |
2017-02-28 | 1200-133-1105 | ND |
2017-03-07 | 1200-133-0725 | ND |
2017-03-07 | 1200-205-1315 | ND |
2017-03-10 | 1200-159-0920 | 1.22 ppb |
2017-03-14 | 1200-133-1303 | ND |
2017-03-21 | 1200-133-1049 | ND |
2017-03-28 | 1200-133-1342 | ND |
2017-04-04 | 1200-133-1209 | ND |
2017-04-11 | 1200-133-1152 | ND |
2017-04-18 | 1200-133-1217 | ND |
2017-04-25 | 1200-133-1210 | ND |
2017-05-02 | 1200-133-1245 | ND |
2017-05-02 | 1200-205-1102 | ND |
2017-05-09 | 1200-011-0940 | ND |
2017-05-09 | 1200-133-0747 | ND |
2017-05-16 | 1200-133-0912 | ND |
2017-05-23 | 1200-133-0832 | ND |
2017-05-30 | 1200-133-1308 | ND |
2017-06-06 | 1200-133-1234 | ND |
2017-06-06 | 1200-205-1058 | ND |
2017-06-13 | 1200-133-0728 | ND |
2017-06-20 | 1200-133-0736 | ND |
2017-06-22 | 1200-159-0830 | 1.11 ppb |
2017-06-27 | 1200-133-0936 | ND |
2017-07-04 | 1200-133-0805 | ND |
2017-07-04 | 1200-205-1014 | ND |
2017-07-10 | 1200-159-1135 | 1.01 ppb |
2017-07-11 | 1200-133-0803 | ND |
2017-07-12 | 1200-205-1000 | ND |
2017-07-18 | 1200-133-0725 | ND |
2017-07-25 | 1200-133-0818 | ND |
2017-08-01 | 1200-133-0825 | ND |
2017-08-08 | 1200-133-1251 | ND |
2017-08-15 | 1200-133-0727 | ND |
2017-08-22 | 1200-133-0914 | ND |
2017-08-29 | 1200-133-0802 | ND |
2017-08-29 | 1200-159-1215 | 1.02 ppb |
2017-09-05 | 1200-133-1225 | ND |
2017-09-12 | 1200-133-1243 | ND |
2017-09-19 | 1200-133-1316 | ND |
2017-09-26 | 1200-133-1225 | ND |
2017-09-27 | 1200-159-1030 | ND |
2017-10-03 | 1200-133-1235 | ND |
2017-10-10 | 1200-133-1218 | ND |
2017-10-17 | 1200-133-1330 | ND |
2017-10-20 | 1200-159-1000 | ND |
2017-10-24 | 1200-133-0751 | ND |
2017-10-31 | 1200-133-0728 | ND |
2017-11-03 | 1200-159-1050 | ND |
2017-11-07 | 1200-133-0738 | ND |
2017-11-14 | 1200-133-0738 | ND |
2017-11-21 | 1200-133-0904 | ND |
2017-11-28 | 1200-133-1209 | ND |
2017-12-05 | 1200-133-1206 | ND |
2017-12-12 | 1200-133-0710 | ND |
2017-12-19 | 1200-133-1200 | ND |
2017-12-26 | 1200-133-1059 | ND |
2018-01-02 | 1200-133-1151 | ND |
2018-01-09 | 1200-133-0917 | ND |
2018-01-16 | 1200-133-0859 | ND |
2018-01-23 | 1200-133-0843 | ND |
2018-01-30 | 1200-133-0948 | ND |
2018-02-06 | 1200-133-0905 | ND |
2018-02-06 | 1200-205-1331 | ND |
2018-02-07 | 1200-133-0930 | ND |
2018-02-13 | 1200-133-0820 | ND |
2018-02-20 | 1200-133-0734 | ND |
2018-02-27 | 1200-133-0800 | ND |
2018-03-06 | 1200-133-1109 | ND |
2018-03-06 | 1200-205-1304 | ND |
2018-03-13 | 1200-133-0723 | ND |
2018-03-20 | 1200-133-0931 | ND |
2018-03-27 | 1200-133-0901 | ND |
2018-04-03 | 1200-133-0912 | ND |
2018-04-03 | 1200-205-1400 | ND |
2018-04-13 | 1200-133-0650 | ND |
2018-04-19 | 1200-133-1130 | ND |
2018-04-26 | 1200-133-1111 | ND |
2018-05-03 | 1200-133-1020 | ND |
2018-05-10 | 1200-133-0756 | ND |
2018-05-10 | 1200-205-0835 | ND |
2018-05-17 | 1200-133-0744 | ND |
2018-05-23 | 1200-011-0925 | ND |
2018-05-24 | 1200-133-1216 | ND |
2018-05-31 | 1200-133-0648 | ND |
2018-06-07 | 1200-133-0747 | ND |
2018-06-07 | 1200-205-0920 | ND |
2018-06-14 | 1200-133-0804 | ND |
2018-06-21 | 1200-133-0748 | ND |
2018-06-28 | 1200-133-0917 | ND |
2018-07-05 | 1200-133-0925 | ND |
2018-07-05 | 1200-205-0907 | ND |
2018-07-12 | 1200-133-0838 | ND |
2018-07-19 | 1200-133-0845 | ND |
2018-07-26 | 1200-133-0827 | ND |
2018-08-02 | 1200-133-1244 | ND |
2018-08-09 | 1200-133-0735 | ND |
2018-08-09 | 1200-205-0829 | ND |
2018-08-16 | 1200-133-1158 | ND |
2018-08-23 | 1200-133-1255 | ND |
2018-08-30 | 1200-133-1000 | ND |
2018-09-06 | 1200-133-0725 | ND |
2018-09-06 | 1200-205-0856 | ND |
2018-09-13 | 1200-133-0740 | ND |
2018-09-20 | 1200-133-1258 | ND |
2018-09-30 | 1200-133-0728 | ND |
2018-10-04 | 1200-133-1043 | ND |
2018-10-04 | 1200-205-0854 | ND |
2018-10-11 | 1200-133-1146 | ND |
2018-10-18 | 1200-133-1106 | ND |
2018-10-25 | 1200-133-0932 | ND |
2018-12-06 | 1200-133-1121 | ND |
2018-12-06 | 1200-205-0930 | ND |
2018-12-13 | 1200-133-1150 | ND |
2018-12-20 | 1200-133-0941 | ND |
2018-12-28 | 1200-133-1111 | ND |
2019-01-03 | 1200-133-1102 | ND |
2019-01-10 | 1200-133-1025 | ND |
2019-01-10 | 1200-205-1059 | ND |
2019-01-24 | 1200-133-1042 | ND |
2019-01-31 | 1200-133-0740 | ND |
2019-02-07 | 1200-133-0759 | ND |
2019-02-07 | 1200-205-1120 | ND |
2019-02-11 | 1200-133-1011 | ND |
2019-02-14 | 1200-133-0739 | ND |
2019-02-21 | 1200-133-1254 | ND |
2019-02-28 | 1200-133-0736 | ND |
2019-03-07 | 1200-133-1306 | ND |
2019-03-07 | 1200-205-0935 | ND |
2019-03-14 | 1200-133-1157 | ND |
2019-03-21 | 1200-133-1218 | ND |
2019-03-28 | 1200-133-1218 | ND |
2019-04-04 | 1200-133-1228 | ND |
2019-04-04 | 1200-205-0914 | ND |
2019-04-18 | 1200-133-0722 | ND |
2019-04-22 | 1200-133-1215 | ND |
2019-04-29 | 1200-133-1131 | ND |
2019-05-06 | 1200-133-1215 | ND |
2019-05-09 | 1200-205-0923 | ND |
2019-05-13 | 1200-133-1240 | ND |
2019-05-20 | 1200-133-1233 | ND |
2019-05-21 | 1200-011-1012 | ND |
2019-05-27 | 1200-133-1140 | ND |
2019-06-03 | 1200-133-1149 | ND |
2019-06-03 | 1200-205-1238 | ND |
2019-06-10 | 1200-133-1236 | ND |
2019-06-17 | 1200-133-1234 | ND |
2019-06-24 | 1200-133-1207 | ND |
2019-07-01 | 1200-133-0705 | ND |
2019-07-01 | 1200-205-1242 | ND |
2019-07-08 | 1200-133-1007 | ND |
2019-07-15 | 1200-133-1102 | ND |
2019-07-22 | 1200-133-0947 | ND |
2019-07-29 | 1200-133-1022 | ND |
2019-08-05 | 1200-133-0910 | ND |
2019-08-05 | 1200-205-1045 | ND |
2019-08-12 | 1200-133-1217 | ND |
2019-08-19 | 1200-133-0723 | ND |
2019-08-26 | 1200-133-0637 | ND |
2019-09-02 | 1200-133-1115 | ND |
2019-09-02 | 1200-205-1030 | ND |
2019-09-09 | 1200-133-0729 | ND |
2019-09-16 | 1200-133-1233 | ND |
2019-09-23 | 1200-133-0809 | ND |
2019-09-30 | 1200-133-0713 | ND |
2019-10-07 | 1200-133-0721 | ND |
2019-10-07 | 1200-205-1045 | ND |
2019-10-14 | 1200-133-0746 | ND |
2019-10-21 | 1200-133-0729 | ND |
2019-10-28 | 1200-133-0955 | ND |
2019-11-04 | 1200-133-1037 | ND |
2019-11-04 | 1200-205-0932 | ND |
2019-11-11 | 1200-133-1108 | ND |
2019-11-18 | 1200-133-1229 | ND |
2019-11-25 | 1200-133-1306 | ND |