Dibromochloromethane
Williamsport Mun Water Authority
Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.
192
Samples
0
Samples exceeding legal limit (MCL)
129
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 2.23 ppb | 32 | 32 | 0.590 ppb - 7.00 ppb |
| 2015 | 0.726 ppb | 32 | 23 | ND - 1.80 ppb |
| 2016 | 2.47 ppb | 32 | 22 | ND - 7.90 ppb |
| 2017 | 0.857 ppb | 32 | 18 | ND - 4.19 ppb |
| 2018 | 0.922 ppb | 32 | 16 | ND - 4.23 ppb |
| 2019 | 1.05 ppb | 32 | 18 | ND - 4.80 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.1 ppb
The EWG Health Guideline of 0.1 ppb for dibromochloromethane was proposed in 2018 by the California Office of Environmental Health Hazard Assessment 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 |
|---|---|---|
| 2014-02-10 | 1071721001 | 1.000 ppb |
| 2014-02-10 | 1071721003 | 0.650 ppb |
| 2014-02-10 | 1071721004 | 0.680 ppb |
| 2014-02-10 | 1071721005 | 1.000 ppb |
| 2014-02-10 | 1071721006 | 1.80 ppb |
| 2014-02-10 | 1071721007 | 0.720 ppb |
| 2014-02-11 | 1071721008 | 1.70 ppb |
| 2014-02-24 | 1073224001 | 0.630 ppb |
| 2014-05-12 | 2006522001 | 1.000 ppb |
| 2014-05-12 | 2006522002 | 0.760 ppb |
| 2014-05-12 | 2006522003 | 0.740 ppb |
| 2014-05-12 | 2006522004 | 0.590 ppb |
| 2014-05-12 | 2006522005 | 0.830 ppb |
| 2014-05-12 | 2006522006 | 0.770 ppb |
| 2014-05-12 | 2006522007 | 1.000 ppb |
| 2014-05-12 | 2006522008 | 0.630 ppb |
| 2014-08-11 | 2023644001 | 1.90 ppb |
| 2014-08-11 | 2023644002 | 1.50 ppb |
| 2014-08-11 | 2023644003 | 1.40 ppb |
| 2014-08-11 | 2023644004 | 1.50 ppb |
| 2014-08-11 | 2023644005 | 2.10 ppb |
| 2014-08-11 | 2023644006 | 2.10 ppb |
| 2014-08-11 | 2023644007 | 2.10 ppb |
| 2014-08-11 | 2023644008 | 1.70 ppb |
| 2014-11-10 | 2039397001 | 5.30 ppb |
| 2014-11-10 | 2039397002 | 5.00 ppb |
| 2014-11-10 | 2039397003 | 4.60 ppb |
| 2014-11-10 | 2039397004 | 5.00 ppb |
| 2014-11-10 | 2039397005 | 4.10 ppb |
| 2014-11-10 | 2039397006 | 7.00 ppb |
| 2014-11-10 | 2039397007 | 5.50 ppb |
| 2014-11-10 | 2039397008 | 6.00 ppb |
| 2015-02-16 | 12453593 | 0.680 ppb |
| 2015-02-16 | 12453599 | ND |
| 2015-02-16 | 12453605 | 0.690 ppb |
| 2015-02-16 | 12567911 | ND |
| 2015-02-16 | 12453612 | 0.740 ppb |
| 2015-02-16 | 12453618 | 0.530 ppb |
| 2015-02-16 | 12453624 | 0.910 ppb |
| 2015-02-16 | 12453630 | 0.570 ppb |
| 2015-05-11 | 12810108 | 0.910 ppb |
| 2015-05-11 | 12810114 | 0.830 ppb |
| 2015-05-11 | 12810120 | 0.740 ppb |
| 2015-05-11 | 12810126 | 0.780 ppb |
| 2015-05-11 | 12810132 | 0.880 ppb |
| 2015-05-11 | 12810138 | 0.880 ppb |
| 2015-05-11 | 12810144 | 0.830 ppb |
| 2015-05-11 | 12810150 | 0.760 ppb |
| 2015-08-10 | 13191954 | 1.40 ppb |
| 2015-08-10 | 13191960 | 1.20 ppb |
| 2015-08-10 | 13191966 | 1.10 ppb |
| 2015-08-10 | 13191972 | 1.10 ppb |
| 2015-08-10 | 13191978 | 1.20 ppb |
| 2015-08-10 | 13191984 | 1.60 ppb |
| 2015-08-10 | 13191990 | 1.80 ppb |
| 2015-08-10 | 13191996 | 1.50 ppb |
| 2015-11-16 | 13568220 | ND |
| 2015-11-16 | 13568226 | ND |
| 2015-11-16 | 13568232 | ND |
| 2015-11-16 | 13568238 | ND |
| 2015-11-16 | 13568244 | ND |
| 2015-11-16 | 13568250 | ND |
| 2015-11-16 | 13568256 | 1.60 ppb |
| 2015-11-16 | 13568262 | ND |
| 2016-02-15 | 13922998 | ND |
| 2016-02-15 | 13923004 | ND |
| 2016-02-15 | 13923010 | ND |
| 2016-02-15 | 13923016 | ND |
| 2016-02-15 | 13923022 | ND |
| 2016-02-15 | 13923028 | ND |
| 2016-02-15 | 13923034 | ND |
| 2016-02-15 | 13923040 | ND |
| 2016-05-16 | 14320669 | 0.660 ppb |
| 2016-05-16 | 14320688 | 0.520 ppb |
| 2016-05-16 | 14320693 | ND |
| 2016-05-16 | 14320675 | ND |
| 2016-05-16 | 14320699 | 0.590 ppb |
| 2016-05-16 | 14320663 | 0.560 ppb |
| 2016-05-16 | 14320705 | 0.750 ppb |
| 2016-05-16 | 14320681 | 0.760 ppb |
| 2016-08-15 | 14813330 | 7.90 ppb |
| 2016-08-15 | 14813325 | 6.99 ppb |
| 2016-08-15 | 14813324 | 6.74 ppb |
| 2016-08-15 | 14813328 | 7.59 ppb |
| 2016-08-15 | 14813329 | 7.75 ppb |
| 2016-08-15 | 14813327 | 7.56 ppb |
| 2016-08-15 | 14813323 | 4.57 ppb |
| 2016-08-15 | 14813326 | 7.48 ppb |
| 2016-11-14 | 15289637 | 1.04 ppb |
| 2016-11-14 | 15289643 | 1.27 ppb |
| 2016-11-14 | 15289649 | 0.690 ppb |
| 2016-11-14 | 15289655 | 0.820 ppb |
| 2016-11-14 | 15289661 | 4.02 ppb |
| 2016-11-14 | 15289667 | 2.02 ppb |
| 2016-11-14 | 15289673 | 5.22 ppb |
| 2016-11-14 | 15289679 | 3.61 ppb |
| 2017-02-13 | 15716076 | ND |
| 2017-02-13 | 15716082 | 0.360 ppb |
| 2017-02-13 | 15716088 | 0.380 ppb |
| 2017-02-13 | 15716094 | 0.310 ppb |
| 2017-02-13 | 15716100 | 0.440 ppb |
| 2017-02-13 | 15716106 | 0.290 ppb |
| 2017-02-13 | 15716112 | 1.000 ppb |
| 2017-02-13 | 15716118 | 0.550 ppb |
| 2017-05-15 | 16167319 | ND |
| 2017-05-15 | 16167325 | ND |
| 2017-05-15 | 16167331 | ND |
| 2017-05-15 | 16167337 | ND |
| 2017-05-15 | 16167343 | ND |
| 2017-05-15 | 16167349 | ND |
| 2017-05-15 | 16167355 | ND |
| 2017-05-15 | 16167361 | ND |
| 2017-08-14 | 16637234 | 2.44 ppb |
| 2017-08-14 | 16637240 | 4.19 ppb |
| 2017-08-14 | 16637246 | 3.58 ppb |
| 2017-08-14 | 16637252 | 3.80 ppb |
| 2017-08-14 | 16637258 | 1.91 ppb |
| 2017-08-14 | 16637264 | 3.24 ppb |
| 2017-08-14 | 16637270 | 0.960 ppb |
| 2017-09-08 | 16794519 | 1.72 ppb |
| 2017-11-13 | 17084478 | ND |
| 2017-11-13 | 17084487 | ND |
| 2017-11-13 | 17084492 | ND |
| 2017-11-13 | 17084499 | ND |
| 2017-11-13 | 17084504 | 0.710 ppb |
| 2017-11-13 | 17084509 | 0.510 ppb |
| 2017-11-13 | 17084516 | 1.04 ppb |
| 2017-11-13 | 17084522 | ND |
| 2018-02-12 | 1803675-01 | ND |
| 2018-02-12 | 1803675-02 | ND |
| 2018-02-12 | 1803675-03 | ND |
| 2018-02-12 | 1803675-04 | ND |
| 2018-02-12 | 1803675-05 | ND |
| 2018-02-12 | 1803675-06 | ND |
| 2018-02-12 | 1803675-07 | ND |
| 2018-02-12 | 1803675-08 | ND |
| 2018-05-14 | 1811445-01 | ND |
| 2018-05-14 | 1811445-02 | ND |
| 2018-05-14 | 1811445-03 | ND |
| 2018-05-14 | 1811445-04 | ND |
| 2018-05-14 | 1811445-05 | 0.500 ppb |
| 2018-05-14 | 1811445-06 | ND |
| 2018-05-14 | 1811445-07 | ND |
| 2018-05-14 | 1811445-08 | ND |
| 2018-08-13 | 1821619-01 | 2.56 ppb |
| 2018-08-13 | 1821619-02 | 3.55 ppb |
| 2018-08-13 | 1821619-04 | 3.84 ppb |
| 2018-08-13 | 1821619-05 | 0.830 ppb |
| 2018-08-13 | 1821619-06 | 2.86 ppb |
| 2018-08-13 | 1821619-07 | 1.34 ppb |
| 2018-08-13 | 1821619-08 | 4.23 ppb |
| 2018-08-20 | 1822594-01 | 3.94 ppb |
| 2018-11-12 | 1829676-01 | 0.790 ppb |
| 2018-11-12 | 1829676-02 | 0.670 ppb |
| 2018-11-12 | 1829676-03 | ND |
| 2018-11-12 | 1829676-04 | 0.630 ppb |
| 2018-11-12 | 1829676-05 | 0.960 ppb |
| 2018-11-12 | 1829676-06 | 0.770 ppb |
| 2018-11-12 | 1829676-08 | 0.830 ppb |
| 2018-11-30 | 1831143-01 | 1.21 ppb |
| 2019-02-11 | 7079366001 | ND |
| 2019-02-11 | 7079366003 | ND |
| 2019-02-11 | 7079366005 | ND |
| 2019-02-11 | 7079366007 | ND |
| 2019-02-11 | 7079366009 | ND |
| 2019-02-11 | 7079366011 | ND |
| 2019-02-11 | 7079366013 | ND |
| 2019-02-11 | 7079366015 | ND |
| 2019-05-13 | 7090310001 | 0.590 ppb |
| 2019-05-13 | 7090310002 | 0.530 ppb |
| 2019-05-13 | 7090310003 | ND |
| 2019-05-13 | 7090310004 | 0.520 ppb |
| 2019-05-13 | 7090310005 | 0.580 ppb |
| 2019-05-13 | 7090310006 | 0.580 ppb |
| 2019-05-13 | 7090310007 | 0.540 ppb |
| 2019-05-13 | 7090310008 | 0.670 ppb |
| 2019-08-12 | 70101010001 | 3.90 ppb |
| 2019-08-12 | 70101010003 | 4.80 ppb |
| 2019-08-12 | 70101010005 | 4.00 ppb |
| 2019-08-12 | 70101010007 | 4.60 ppb |
| 2019-08-12 | 70101010009 | 1.50 ppb |
| 2019-08-12 | 70101010011 | 3.20 ppb |
| 2019-08-12 | 70101010013 | 1.40 ppb |
| 2019-08-12 | 70101010015 | 4.40 ppb |
| 2019-11-11 | 70111648001 | 0.500 ppb |
| 2019-11-11 | 70111648002 | ND |
| 2019-11-11 | 70111648003 | ND |
| 2019-11-11 | 70111648004 | ND |
| 2019-11-11 | 70111648005 | ND |
| 2019-11-11 | 70111648006 | 0.510 ppb |
| 2019-11-11 | 70111648007 | 0.690 ppb |
| 2019-11-11 | 70111648008 | ND |