1,4-Dioxane
Acton Water Supply District
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.
437
Samples
0
Samples exceeding legal limit (MCL)
52
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | 0.119 ppb | 14 | 6 | ND - 0.410 ppb |
| 2014 | 0.241 ppb | 156 | 153 | ND - 0.460 ppb |
| 2015 | 0.277 ppb | 48 | 48 | 0.200 ppb - 0.460 ppb |
| 2016 | 0.281 ppb | 66 | 66 | 0.170 ppb - 0.415 ppb |
| 2017 | 0.205 ppb | 48 | 45 | ND - 0.406 ppb |
| 2018 | 0.206 ppb | 60 | 54 | ND - 0.420 ppb |
| 2019 | 0.0355 ppb | 45 | 9 | ND - 0.215 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 | Result |
|---|---|
| 2013-05-13 | ND |
| 2013-05-13 | 0.290 ppb |
| 2013-05-13 | 0.260 ppb |
| 2013-05-14 | 0.0990 ppb |
| 2013-05-14 | ND |
| 2013-05-14 | ND |
| 2013-08-13 | 0.280 ppb |
| 2013-08-13 | ND |
| 2013-11-19 | ND |
| 2013-11-19 | ND |
| 2013-11-20 | ND |
| 2013-12-09 | ND |
| 2013-12-09 | 0.410 ppb |
| 2013-12-09 | 0.330 ppb |
| 2014-01-13 | 0.0820 ppb |
| 2014-01-13 | 0.0820 ppb |
| 2014-01-13 | 0.0820 ppb |
| 2014-01-13 | 0.249 ppb |
| 2014-01-13 | 0.249 ppb |
| 2014-01-13 | 0.249 ppb |
| 2014-01-13 | 0.265 ppb |
| 2014-01-13 | 0.265 ppb |
| 2014-01-13 | 0.265 ppb |
| 2014-01-13 | 0.281 ppb |
| 2014-01-13 | 0.281 ppb |
| 2014-01-13 | 0.281 ppb |
| 2014-01-13 | 0.140 ppb |
| 2014-01-13 | 0.140 ppb |
| 2014-01-13 | 0.140 ppb |
| 2014-01-13 | 0.300 ppb |
| 2014-01-13 | 0.300 ppb |
| 2014-01-13 | 0.300 ppb |
| 2014-01-13 | 0.250 ppb |
| 2014-01-13 | 0.250 ppb |
| 2014-01-13 | 0.250 ppb |
| 2014-02-11 | 0.240 ppb |
| 2014-02-11 | 0.240 ppb |
| 2014-02-11 | 0.240 ppb |
| 2014-02-11 | 0.350 ppb |
| 2014-02-11 | 0.350 ppb |
| 2014-02-11 | 0.350 ppb |
| 2014-02-11 | 0.120 ppb |
| 2014-02-11 | 0.120 ppb |
| 2014-02-11 | 0.120 ppb |
| 2014-02-11 | 0.230 ppb |
| 2014-02-11 | 0.230 ppb |
| 2014-02-11 | 0.230 ppb |
| 2014-02-11 | 0.420 ppb |
| 2014-02-11 | 0.420 ppb |
| 2014-02-11 | 0.420 ppb |
| 2014-02-11 | 0.0530 ppb |
| 2014-02-11 | 0.0530 ppb |
| 2014-02-11 | 0.0530 ppb |
| 2014-02-11 | 0.150 ppb |
| 2014-02-11 | 0.150 ppb |
| 2014-02-11 | 0.150 ppb |
| 2014-02-11 | 0.260 ppb |
| 2014-02-11 | 0.260 ppb |
| 2014-02-11 | 0.260 ppb |
| 2014-02-12 | 0.1000 ppb |
| 2014-02-12 | 0.1000 ppb |
| 2014-02-12 | 0.1000 ppb |
| 2014-02-12 | 0.420 ppb |
| 2014-02-12 | 0.420 ppb |
| 2014-02-12 | 0.420 ppb |
| 2014-05-09 | 0.160 ppb |
| 2014-05-09 | 0.160 ppb |
| 2014-05-09 | 0.160 ppb |
| 2014-05-09 | 0.380 ppb |
| 2014-05-09 | 0.380 ppb |
| 2014-05-09 | 0.380 ppb |
| 2014-05-12 | 0.310 ppb |
| 2014-05-12 | 0.310 ppb |
| 2014-05-12 | 0.310 ppb |
| 2014-05-12 | 0.120 ppb |
| 2014-05-12 | 0.120 ppb |
| 2014-05-12 | 0.120 ppb |
| 2014-05-12 | 0.120 ppb |
| 2014-05-12 | 0.120 ppb |
| 2014-05-12 | 0.120 ppb |
| 2014-05-12 | 0.460 ppb |
| 2014-05-12 | 0.460 ppb |
| 2014-05-12 | 0.460 ppb |
| 2014-05-12 | ND |
| 2014-05-12 | ND |
| 2014-05-12 | ND |
| 2014-05-12 | 0.370 ppb |
| 2014-05-12 | 0.370 ppb |
| 2014-05-12 | 0.370 ppb |
| 2014-05-12 | 0.280 ppb |
| 2014-05-12 | 0.280 ppb |
| 2014-05-12 | 0.280 ppb |
| 2014-06-02 | 0.262 ppb |
| 2014-06-02 | 0.262 ppb |
| 2014-06-02 | 0.262 ppb |
| 2014-06-02 | 0.262 ppb |
| 2014-06-02 | 0.262 ppb |
| 2014-06-02 | 0.262 ppb |
| 2014-06-02 | 0.277 ppb |
| 2014-06-02 | 0.277 ppb |
| 2014-06-02 | 0.277 ppb |
| 2014-06-02 | 0.135 ppb |
| 2014-06-02 | 0.135 ppb |
| 2014-06-02 | 0.135 ppb |
| 2014-06-02 | 0.141 ppb |
| 2014-06-02 | 0.141 ppb |
| 2014-06-02 | 0.141 ppb |
| 2014-06-02 | 0.320 ppb |
| 2014-06-02 | 0.320 ppb |
| 2014-06-02 | 0.320 ppb |
| 2014-06-02 | 0.242 ppb |
| 2014-06-02 | 0.242 ppb |
| 2014-06-02 | 0.242 ppb |
| 2014-08-04 | 0.255 ppb |
| 2014-08-04 | 0.255 ppb |
| 2014-08-04 | 0.255 ppb |
| 2014-08-04 | 0.240 ppb |
| 2014-08-04 | 0.240 ppb |
| 2014-08-04 | 0.240 ppb |
| 2014-08-08 | 0.260 ppb |
| 2014-08-08 | 0.260 ppb |
| 2014-08-08 | 0.260 ppb |
| 2014-08-08 | 0.280 ppb |
| 2014-08-08 | 0.280 ppb |
| 2014-08-08 | 0.280 ppb |
| 2014-08-20 | 0.180 ppb |
| 2014-08-20 | 0.180 ppb |
| 2014-08-20 | 0.180 ppb |
| 2014-08-20 | 0.150 ppb |
| 2014-08-20 | 0.150 ppb |
| 2014-08-20 | 0.150 ppb |
| 2014-08-20 | 0.290 ppb |
| 2014-08-20 | 0.290 ppb |
| 2014-08-20 | 0.290 ppb |
| 2014-10-20 | 0.274 ppb |
| 2014-10-20 | 0.274 ppb |
| 2014-10-20 | 0.274 ppb |
| 2014-10-20 | 0.275 ppb |
| 2014-10-20 | 0.275 ppb |
| 2014-10-20 | 0.275 ppb |
| 2014-10-20 | 0.248 ppb |
| 2014-10-20 | 0.248 ppb |
| 2014-10-20 | 0.248 ppb |
| 2014-10-20 | 0.191 ppb |
| 2014-10-20 | 0.191 ppb |
| 2014-10-20 | 0.191 ppb |
| 2014-10-20 | 0.152 ppb |
| 2014-10-20 | 0.152 ppb |
| 2014-10-20 | 0.152 ppb |
| 2014-10-20 | 0.314 ppb |
| 2014-10-20 | 0.314 ppb |
| 2014-10-20 | 0.314 ppb |
| 2014-10-20 | 0.228 ppb |
| 2014-10-20 | 0.228 ppb |
| 2014-10-20 | 0.228 ppb |
| 2014-11-04 | 0.330 ppb |
| 2014-11-04 | 0.330 ppb |
| 2014-11-04 | 0.330 ppb |
| 2014-11-04 | 0.190 ppb |
| 2014-11-04 | 0.190 ppb |
| 2014-11-04 | 0.190 ppb |
| 2014-11-04 | 0.200 ppb |
| 2014-11-04 | 0.200 ppb |
| 2014-11-04 | 0.200 ppb |
| 2014-11-04 | 0.440 ppb |
| 2014-11-04 | 0.440 ppb |
| 2014-11-04 | 0.440 ppb |
| 2014-11-04 | 0.310 ppb |
| 2014-11-04 | 0.310 ppb |
| 2014-11-04 | 0.310 ppb |
| 2015-02-18 | 0.270 ppb |
| 2015-02-18 | 0.270 ppb |
| 2015-02-18 | 0.270 ppb |
| 2015-02-18 | 0.460 ppb |
| 2015-02-18 | 0.460 ppb |
| 2015-02-18 | 0.460 ppb |
| 2015-03-10 | 0.371 ppb |
| 2015-03-10 | 0.371 ppb |
| 2015-03-10 | 0.371 ppb |
| 2015-06-26 | 0.218 ppb |
| 2015-06-26 | 0.218 ppb |
| 2015-06-26 | 0.218 ppb |
| 2015-06-26 | 0.200 ppb |
| 2015-06-26 | 0.200 ppb |
| 2015-06-26 | 0.200 ppb |
| 2015-06-26 | 0.200 ppb |
| 2015-06-26 | 0.200 ppb |
| 2015-06-26 | 0.200 ppb |
| 2015-06-26 | 0.200 ppb |
| 2015-06-26 | 0.200 ppb |
| 2015-06-26 | 0.200 ppb |
| 2015-06-26 | 0.234 ppb |
| 2015-06-26 | 0.234 ppb |
| 2015-06-26 | 0.234 ppb |
| 2015-08-17 | 0.219 ppb |
| 2015-08-17 | 0.219 ppb |
| 2015-08-17 | 0.219 ppb |
| 2015-08-17 | 0.449 ppb |
| 2015-08-17 | 0.449 ppb |
| 2015-08-17 | 0.449 ppb |
| 2015-11-16 | 0.258 ppb |
| 2015-11-16 | 0.258 ppb |
| 2015-11-16 | 0.258 ppb |
| 2015-11-16 | 0.251 ppb |
| 2015-11-16 | 0.251 ppb |
| 2015-11-16 | 0.251 ppb |
| 2015-11-16 | 0.251 ppb |
| 2015-11-16 | 0.251 ppb |
| 2015-11-16 | 0.251 ppb |
| 2015-11-16 | 0.200 ppb |
| 2015-11-16 | 0.200 ppb |
| 2015-11-16 | 0.200 ppb |
| 2015-11-16 | 0.371 ppb |
| 2015-11-16 | 0.371 ppb |
| 2015-11-16 | 0.371 ppb |
| 2015-11-16 | 0.277 ppb |
| 2015-11-16 | 0.277 ppb |
| 2015-11-16 | 0.277 ppb |
| 2016-02-10 | 0.291 ppb |
| 2016-02-10 | 0.291 ppb |
| 2016-02-10 | 0.291 ppb |
| 2016-05-27 | 0.300 ppb |
| 2016-05-27 | 0.300 ppb |
| 2016-05-27 | 0.300 ppb |
| 2016-05-27 | 0.170 ppb |
| 2016-05-27 | 0.170 ppb |
| 2016-05-27 | 0.170 ppb |
| 2016-05-27 | 0.170 ppb |
| 2016-05-27 | 0.170 ppb |
| 2016-05-27 | 0.170 ppb |
| 2016-05-27 | 0.370 ppb |
| 2016-05-27 | 0.370 ppb |
| 2016-05-27 | 0.370 ppb |
| 2016-05-27 | 0.240 ppb |
| 2016-05-27 | 0.240 ppb |
| 2016-05-27 | 0.240 ppb |
| 2016-05-27 | 0.270 ppb |
| 2016-05-27 | 0.270 ppb |
| 2016-05-27 | 0.270 ppb |
| 2016-06-06 | 0.238 ppb |
| 2016-06-06 | 0.238 ppb |
| 2016-06-06 | 0.238 ppb |
| 2016-06-06 | 0.289 ppb |
| 2016-06-06 | 0.289 ppb |
| 2016-06-06 | 0.289 ppb |
| 2016-06-06 | 0.200 ppb |
| 2016-06-06 | 0.200 ppb |
| 2016-06-06 | 0.200 ppb |
| 2016-06-06 | 0.328 ppb |
| 2016-06-06 | 0.328 ppb |
| 2016-06-06 | 0.328 ppb |
| 2016-06-06 | 0.239 ppb |
| 2016-06-06 | 0.239 ppb |
| 2016-06-06 | 0.239 ppb |
| 2016-09-07 | 0.256 ppb |
| 2016-09-07 | 0.256 ppb |
| 2016-09-07 | 0.256 ppb |
| 2016-09-07 | 0.377 ppb |
| 2016-09-07 | 0.377 ppb |
| 2016-09-07 | 0.377 ppb |
| 2016-11-17 | 0.285 ppb |
| 2016-11-17 | 0.285 ppb |
| 2016-11-17 | 0.285 ppb |
| 2016-11-17 | 0.386 ppb |
| 2016-11-17 | 0.386 ppb |
| 2016-11-17 | 0.386 ppb |
| 2016-11-17 | 0.236 ppb |
| 2016-11-17 | 0.236 ppb |
| 2016-11-17 | 0.236 ppb |
| 2016-11-17 | 0.206 ppb |
| 2016-11-17 | 0.206 ppb |
| 2016-11-17 | 0.206 ppb |
| 2016-11-17 | 0.415 ppb |
| 2016-11-17 | 0.415 ppb |
| 2016-11-17 | 0.415 ppb |
| 2016-11-17 | 0.241 ppb |
| 2016-11-17 | 0.241 ppb |
| 2016-11-17 | 0.241 ppb |
| 2016-12-19 | 0.272 ppb |
| 2016-12-19 | 0.272 ppb |
| 2016-12-19 | 0.272 ppb |
| 2016-12-19 | 0.406 ppb |
| 2016-12-19 | 0.406 ppb |
| 2016-12-19 | 0.406 ppb |
| 2017-02-01 | 0.257 ppb |
| 2017-02-01 | 0.257 ppb |
| 2017-02-01 | 0.257 ppb |
| 2017-02-01 | 0.226 ppb |
| 2017-02-01 | 0.226 ppb |
| 2017-02-01 | 0.226 ppb |
| 2017-02-01 | 0.406 ppb |
| 2017-02-01 | 0.406 ppb |
| 2017-02-01 | 0.406 ppb |
| 2017-05-03 | 0.201 ppb |
| 2017-05-03 | 0.201 ppb |
| 2017-05-03 | 0.201 ppb |
| 2017-05-03 | 0.160 ppb |
| 2017-05-03 | 0.160 ppb |
| 2017-05-03 | 0.160 ppb |
| 2017-05-03 | 0.0960 ppb |
| 2017-05-03 | 0.0960 ppb |
| 2017-05-03 | 0.0960 ppb |
| 2017-05-03 | 0.218 ppb |
| 2017-05-03 | 0.218 ppb |
| 2017-05-03 | 0.218 ppb |
| 2017-05-03 | 0.336 ppb |
| 2017-05-03 | 0.336 ppb |
| 2017-05-03 | 0.336 ppb |
| 2017-05-03 | 0.169 ppb |
| 2017-05-03 | 0.169 ppb |
| 2017-05-03 | 0.169 ppb |
| 2017-08-31 | 0.182 ppb |
| 2017-08-31 | 0.182 ppb |
| 2017-08-31 | 0.182 ppb |
| 2017-12-11 | 0.211 ppb |
| 2017-12-11 | 0.211 ppb |
| 2017-12-11 | 0.211 ppb |
| 2017-12-11 | 0.163 ppb |
| 2017-12-11 | 0.163 ppb |
| 2017-12-11 | 0.163 ppb |
| 2017-12-11 | ND |
| 2017-12-11 | ND |
| 2017-12-11 | ND |
| 2017-12-11 | 0.302 ppb |
| 2017-12-11 | 0.302 ppb |
| 2017-12-11 | 0.302 ppb |
| 2017-12-11 | 0.186 ppb |
| 2017-12-11 | 0.186 ppb |
| 2017-12-11 | 0.186 ppb |
| 2017-12-11 | 0.167 ppb |
| 2017-12-11 | 0.167 ppb |
| 2017-12-11 | 0.167 ppb |
| 2018-03-14 | 0.235 ppb |
| 2018-03-14 | 0.235 ppb |
| 2018-03-14 | 0.235 ppb |
| 2018-03-26 | 0.290 ppb |
| 2018-03-26 | 0.290 ppb |
| 2018-03-26 | 0.290 ppb |
| 2018-03-26 | 0.120 ppb |
| 2018-03-26 | 0.120 ppb |
| 2018-03-26 | 0.120 ppb |
| 2018-03-26 | 0.340 ppb |
| 2018-03-26 | 0.340 ppb |
| 2018-03-26 | 0.340 ppb |
| 2018-03-26 | 0.200 ppb |
| 2018-03-26 | 0.200 ppb |
| 2018-03-26 | 0.200 ppb |
| 2018-03-26 | 0.240 ppb |
| 2018-03-26 | 0.240 ppb |
| 2018-03-26 | 0.240 ppb |
| 2018-04-12 | 0.420 ppb |
| 2018-04-12 | 0.420 ppb |
| 2018-04-12 | 0.420 ppb |
| 2018-06-11 | 0.204 ppb |
| 2018-06-11 | 0.204 ppb |
| 2018-06-11 | 0.204 ppb |
| 2018-06-11 | 0.195 ppb |
| 2018-06-11 | 0.195 ppb |
| 2018-06-11 | 0.195 ppb |
| 2018-06-11 | ND |
| 2018-06-11 | ND |
| 2018-06-11 | ND |
| 2018-06-11 | 0.157 ppb |
| 2018-06-11 | 0.157 ppb |
| 2018-06-11 | 0.157 ppb |
| 2018-06-11 | 0.340 ppb |
| 2018-06-11 | 0.340 ppb |
| 2018-06-11 | 0.340 ppb |
| 2018-06-11 | 0.209 ppb |
| 2018-06-11 | 0.209 ppb |
| 2018-06-11 | 0.209 ppb |
| 2018-09-19 | 0.136 ppb |
| 2018-09-19 | 0.136 ppb |
| 2018-09-19 | 0.136 ppb |
| 2018-12-10 | 0.206 ppb |
| 2018-12-10 | 0.206 ppb |
| 2018-12-10 | 0.206 ppb |
| 2018-12-10 | 0.172 ppb |
| 2018-12-10 | 0.172 ppb |
| 2018-12-10 | 0.172 ppb |
| 2018-12-10 | ND |
| 2018-12-10 | ND |
| 2018-12-10 | ND |
| 2018-12-10 | 0.323 ppb |
| 2018-12-10 | 0.323 ppb |
| 2018-12-10 | 0.323 ppb |
| 2018-12-10 | 0.149 ppb |
| 2018-12-10 | 0.149 ppb |
| 2018-12-10 | 0.149 ppb |
| 2018-12-10 | 0.181 ppb |
| 2018-12-10 | 0.181 ppb |
| 2018-12-10 | 0.181 ppb |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | 0.215 ppb |
| 2019-05-14 | 0.215 ppb |
| 2019-05-14 | 0.215 ppb |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-05-14 | ND |
| 2019-09-16 | ND |
| 2019-09-16 | ND |
| 2019-09-16 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | ND |
| 2019-12-11 | 0.166 ppb |
| 2019-12-11 | 0.166 ppb |
| 2019-12-11 | 0.166 ppb |
| 2019-12-11 | 0.152 ppb |
| 2019-12-11 | 0.152 ppb |
| 2019-12-11 | 0.152 ppb |