Dibromochloromethane
Town of Tonawanda Water Department
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.
108
Samples
0
Samples exceeding legal limit (MCL)
108
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 4.96 ppb | 28 | 28 | 2.52 ppb - 7.14 ppb |
| 2015 | 4.94 ppb | 16 | 16 | 3.78 ppb - 6.58 ppb |
| 2016 | 5.21 ppb | 16 | 16 | 3.74 ppb - 6.43 ppb |
| 2017 | 5.26 ppb | 16 | 16 | 4.18 ppb - 6.95 ppb |
| 2018 | 5.36 ppb | 17 | 17 | 3.78 ppb - 7.11 ppb |
| 2019 | 5.65 ppb | 15 | 15 | 3.76 ppb - 13.2 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 |
|---|---|---|
| 2014-01-08 | 140109216 DBP 1S | 3.45 ppb |
| 2014-01-08 | 140109213 DBP 1S | 4.31 ppb |
| 2014-01-08 | 140109212 DBP 1S | 4.16 ppb |
| 2014-01-08 | 140109218 DBP 1S | 4.28 ppb |
| 2014-01-08 | 14109217 DBP 1ST | 4.06 ppb |
| 2014-01-08 | 140109214 DBP 1S | 2.85 ppb |
| 2014-01-08 | 140109215 DBP 1S | 2.62 ppb |
| 2014-01-08 | 140109211 DBP1ST | 2.52 ppb |
| 2014-04-11 | DBP 2ND Q 14 STA | 4.89 ppb |
| 2014-04-11 | 2ND Q 14STAGE2DB | 3.79 ppb |
| 2014-04-11 | STAGE 2 DBP 2NDQ | 4.21 ppb |
| 2014-04-11 | LRAA7 2ND Q 14 D | 5.56 ppb |
| 2014-04-11 | DBP 2ND Q 14 STA | 4.12 ppb |
| 2014-04-11 | STAGE 2DBP 2ND Q | 4.95 ppb |
| 2014-04-11 | LRAA8 2ND Q 14 D | 4.84 ppb |
| 2014-04-11 | DBP2ND Q 14 STAG | 5.24 ppb |
| 2014-07-09 | S4G11068 3RD Q 1 | 6.59 ppb |
| 2014-07-09 | S4G11062 3RD Q 1 | 7.14 ppb |
| 2014-07-09 | S4G11064 3RD Q 1 | 6.31 ppb |
| 2014-07-09 | S4G11066 3RD Q 1 | 6.64 ppb |
| 2014-07-09 | S4G11067 3RD Q 1 | 6.61 ppb |
| 2014-07-09 | S4G11065 3RD Q 1 | 6.30 ppb |
| 2014-07-09 | S4G1106 3RD Q 14 | 5.92 ppb |
| 2014-07-09 | S4G11063 3RD Q 1 | 6.75 ppb |
| 2014-10-08 | 4 Q 14 DBP SIT E | 5.16 ppb |
| 2014-10-08 | 4 Q 14 DBP SITE | 5.42 ppb |
| 2014-10-08 | 4 Q 2014 DBP SIT | 5.05 ppb |
| 2014-10-08 | 4 Q 14 DBP SITE | 5.22 ppb |
| 2015-01-07 | 107152 1ST Q 15 | 3.86 ppb |
| 2015-01-07 | 010715 1 DBP 1ST | 4.01 ppb |
| 2015-01-07 | 0107154 1ST Q 15 | 3.78 ppb |
| 2015-01-07 | 0107152 1ST Q 15 | 3.90 ppb |
| 2015-04-08 | 4/8/15-2 | 4.11 ppb |
| 2015-04-08 | 4/8/15-3 | 3.91 ppb |
| 2015-04-08 | 4/8/15-1 | 4.64 ppb |
| 2015-04-08 | 4/8/15-4 | 4.10 ppb |
| 2015-07-08 | 070815 -1 | 6.18 ppb |
| 2015-07-08 | 07/08/15 -2 | 6.36 ppb |
| 2015-07-08 | 07/08/15 -4 | 6.08 ppb |
| 2015-07-08 | 07/08/15 -3 | 6.58 ppb |
| 2015-10-09 | 2 4TH Q 15 DBPS | 5.45 ppb |
| 2015-10-09 | 4TH Q 2015 DBPS | 5.07 ppb |
| 2015-10-09 | 3 4TH Q 2015 DBP | 5.76 ppb |
| 2015-10-09 | 4 15 4TH Q DBPS | 5.27 ppb |
| 2016-01-05 | 0105164 DBP | 4.04 ppb |
| 2016-01-05 | 0105163 DBP | 4.00 ppb |
| 2016-01-05 | 0105162 DBP | 3.77 ppb |
| 2016-01-05 | 15161 DBP 16 | 3.74 ppb |
| 2016-04-05 | 04/05/2016-2660 | 5.37 ppb |
| 2016-04-05 | 04/05/2016-2974 | 5.29 ppb |
| 2016-04-05 | 04/05/2016-84 | 5.13 ppb |
| 2016-04-05 | 04/05/2016-4264 | 4.94 ppb |
| 2016-07-05 | 07/05/2016-84 | 6.02 ppb |
| 2016-07-05 | 07/05/2016-2660 | 6.43 ppb |
| 2016-07-05 | 07/05/2016-4264 | 6.05 ppb |
| 2016-07-05 | 07/05/2016-2974 | 5.86 ppb |
| 2016-10-04 | 10/04/2016-04 | 5.80 ppb |
| 2016-10-04 | 10/04/2016-03 | 5.34 ppb |
| 2016-10-04 | 10/04/2016-02 | 5.64 ppb |
| 2016-10-04 | 10/04/2016-01 | 5.86 ppb |
| 2017-01-03 | 01/03/2017-03 | 4.18 ppb |
| 2017-01-03 | 01/03/2017-01 | 4.23 ppb |
| 2017-01-03 | 01/03/2017-02 | 4.28 ppb |
| 2017-01-03 | 01/03/2017-04 | 4.37 ppb |
| 2017-04-04 | 0417821 | 4.42 ppb |
| 2017-04-04 | 042017918 | 4.66 ppb |
| 2017-04-04 | 0420171001 | 4.38 ppb |
| 2017-04-04 | 0420140943 | 4.38 ppb |
| 2017-07-05 | 7520171113 | 5.70 ppb |
| 2017-07-05 | 7520171112 | 5.98 ppb |
| 2017-07-05 | 7520171115 | 5.68 ppb |
| 2017-07-05 | 7520171114 | 5.42 ppb |
| 2017-10-03 | TOTOCT 2017 DBP | 6.43 ppb |
| 2017-10-03 | TOT OCT2017 1 | 6.12 ppb |
| 2017-10-03 | TOT OCT 2017 DBP | 6.91 ppb |
| 2017-10-03 | TOT OCT 2017 DBP | 6.95 ppb |
| 2018-01-09 | 10918 2974 COLVI | 4.18 ppb |
| 2018-01-09 | 0109181 1ST Q DB | 4.39 ppb |
| 2018-01-09 | 10918 84 HAWTHOR | 4.85 ppb |
| 2018-01-09 | 10918 4264 DELAW | 4.39 ppb |
| 2018-01-09 | 10918 DBP9 2660 | 4.37 ppb |
| 2018-04-03 | 4318 2974 COLVIN | 3.78 ppb |
| 2018-04-03 | 4318 84 HAWTHORN | 4.35 ppb |
| 2018-04-03 | 4318 4264 DELAWA | 4.19 ppb |
| 2018-04-03 | 4318 2660 NFB DB | 4.14 ppb |
| 2018-07-03 | DBP 3RD Q 18 426 | 6.77 ppb |
| 2018-07-03 | DBP 3RD Q 18 297 | 6.95 ppb |
| 2018-07-03 | 3RD Q 2018 DBP 8 | 7.11 ppb |
| 2018-07-03 | DBP 3RD Q 18 266 | 6.79 ppb |
| 2018-10-09 | TONA 3 DBP 4TH Q | 6.12 ppb |
| 2018-10-09 | TONA 4 DBP 4TH Q | 6.21 ppb |
| 2018-10-09 | TONA 1 DBP 4TH Q | 6.23 ppb |
| 2018-10-09 | TONA 2 DBP 4TH Q | 6.25 ppb |
| 2019-01-07 | 2660 NIAFALLBLVD | 3.81 ppb |
| 2019-01-07 | 84 HAW | 3.85 ppb |
| 2019-01-07 | 4264 DEL | 3.92 ppb |
| 2019-01-10 | 2974 COL | 3.76 ppb |
| 2019-04-09 | 2660 NFBLVD | 4.49 ppb |
| 2019-04-09 | 2974 COLVIN | 4.11 ppb |
| 2019-04-09 | 4264 DELAWARE | 4.50 ppb |
| 2019-04-09 | 84 HAWTHORNE | 4.65 ppb |
| 2019-07-09 | 4264 DELAWARE 3Q | 6.48 ppb |
| 2019-07-09 | 2660 NIA FALL 3Q | 6.55 ppb |
| 2019-07-09 | 2974 COLVIN 3RD | 6.50 ppb |
| 2019-10-08 | 84 HAW 4QTR | 6.68 ppb |
| 2019-10-08 | 4264 DEL 4QTR | 5.91 ppb |
| 2019-10-08 | 2660 NIA FALLS 4 | 13.2 ppb |
| 2019-10-08 | 2974 COLVIN 4QTR | 6.37 ppb |