Dibromochloromethane
Dunkirk City and Area
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.
92
Samples
0
Samples exceeding legal limit (MCL)
92
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 4.82 ppb | 10 | 10 | 3.76 ppb - 6.20 ppb |
| 2015 | 3.77 ppb | 16 | 16 | 2.23 ppb - 7.00 ppb |
| 2016 | 5.04 ppb | 16 | 16 | 2.50 ppb - 8.80 ppb |
| 2017 | 4.82 ppb | 16 | 16 | 2.50 ppb - 10.3 ppb |
| 2018 | 4.45 ppb | 18 | 18 | 2.00 ppb - 8.50 ppb |
| 2019 | 3.42 ppb | 16 | 16 | 0.650 ppb - 5.40 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 |
|---|---|---|
| 2014-05-01 | MAY14 DUNKIRK SA | 3.76 ppb |
| 2014-05-01 | MAY14 DUNKIRK SA | 5.05 ppb |
| 2014-08-21 | AUG 2014 LAFAYET | 4.50 ppb |
| 2014-08-21 | AUG 2014 ST COLU | 6.20 ppb |
| 2014-08-21 | AUG 2014 DON FRA | 5.25 ppb |
| 2014-08-21 | AUG 2014 HOYT | 4.70 ppb |
| 2014-11-05 | NOV14 ST. COLUMB | 4.72 ppb |
| 2014-11-05 | NOV14 DON FRAME | 4.82 ppb |
| 2014-11-06 | NOV14 17 LAFAYET | 4.71 ppb |
| 2014-11-06 | NOV14 344 HOYT | 4.45 ppb |
| 2015-02-04 | FEB15 4737 WILLO | 3.27 ppb |
| 2015-02-04 | FEB15 LAFAYETTE | 2.45 ppb |
| 2015-02-04 | FEB15 344 HOYT | 3.15 ppb |
| 2015-02-04 | FEB15 ST. COLUMB | 2.67 ppb |
| 2015-05-14 | MAY15 HOYT ST | 2.23 ppb |
| 2015-05-14 | MAY15 LAFAYETTE | 3.66 ppb |
| 2015-05-14 | MAY15 WILLOW ROA | 2.25 ppb |
| 2015-05-14 | MAY15 ST. COLUMB | 3.24 ppb |
| 2015-08-06 | AUG15 17 LAFAYET | 7.00 ppb |
| 2015-08-06 | AUG15 344 HOYT | 6.24 ppb |
| 2015-08-06 | AUG15 ST. COLUMB | 5.88 ppb |
| 2015-08-06 | AUG15 4737 WILLO | 5.46 ppb |
| 2015-11-19 | NOV15 ST COLUMBA | 4.27 ppb |
| 2015-11-19 | NOV15 HOYT ST | 2.91 ppb |
| 2015-11-19 | NOV15 4737WILLOW | 2.66 ppb |
| 2015-11-19 | NOV15 LAFAYETTE | 3.02 ppb |
| 2016-02-23 | FEB16 JN ADAM | 3.20 ppb |
| 2016-02-23 | FEB16 17 LAFAYET | 2.50 ppb |
| 2016-02-23 | FEB16 334 HOYT | 2.60 ppb |
| 2016-02-23 | FEB16 ST. COLUMB | 3.70 ppb |
| 2016-05-10 | 2NDQT16 344 HOYT | 3.10 ppb |
| 2016-05-10 | 2NDQT16 ST COLUM | 4.00 ppb |
| 2016-05-10 | 2NDQT16 17 LAFAY | 3.90 ppb |
| 2016-05-10 | 2NDQT16 JN ADAM | 3.80 ppb |
| 2016-08-10 | AUG16 ST COLUMBA | 8.80 ppb |
| 2016-08-10 | AUG16 LAFAYETTE | 7.50 ppb |
| 2016-08-10 | AUG16 HOYT, DUNK | 6.20 ppb |
| 2016-08-10 | AUG16 JN ADAM DU | 7.50 ppb |
| 2016-11-02 | NOV16 JN ADAM | 6.00 ppb |
| 2016-11-02 | NOV16 344 HOYT | 5.20 ppb |
| 2016-11-02 | NOV16 ST COLUMBA | 7.60 ppb |
| 2016-11-02 | NOV16 17 LAFAYET | 5.00 ppb |
| 2017-02-08 | FEB17 ST. COLUMB | 3.50 ppb |
| 2017-02-08 | FEB17 344 HOYT | 2.50 ppb |
| 2017-02-08 | FEB17 JN ADAMS H | 3.70 ppb |
| 2017-02-08 | FEB17 17 LAFYETT | 2.90 ppb |
| 2017-05-03 | MAY17 344 HOYT | 3.40 ppb |
| 2017-05-03 | MAY17 ST COLULMB | 4.30 ppb |
| 2017-05-03 | MAY17 JN ADAMS | 4.70 ppb |
| 2017-05-03 | MAY17 LAFAYETTE | 4.70 ppb |
| 2017-08-09 | AUG17 LAFAYETTE | 6.90 ppb |
| 2017-08-09 | AUG17 ST. COLUMB | 6.60 ppb |
| 2017-08-09 | AUG17 JN ADAMS | 3.80 ppb |
| 2017-08-09 | AUG17 HOYT | 5.90 ppb |
| 2017-11-08 | NOV17 ST. COLUMB | 5.80 ppb |
| 2017-11-08 | NOV17 344 HOYT | 3.80 ppb |
| 2017-11-08 | NOV17 JN ADAM 20 | 10.3 ppb |
| 2017-11-08 | NOV17 17 LAFEYET | 4.30 ppb |
| 2018-02-13 | Q1DUNKIRK 2018 C | 4.50 ppb |
| 2018-02-13 | R1801331-004 | 4.50 ppb |
| 2018-02-13 | Q1DUNKIRK 2018 H | 2.60 ppb |
| 2018-02-13 | Q1DUNKIRK 2018 L | 4.00 ppb |
| 2018-02-13 | Q1DUNKIRK 2018 J | 3.70 ppb |
| 2018-05-08 | Q219 SENIOR CTR | 4.00 ppb |
| 2018-05-09 | Q2DUNKIRK 18 LAF | 3.20 ppb |
| 2018-05-09 | Q2DUNKIRK 18 COL | 3.30 ppb |
| 2018-05-09 | Q2DUNKIRK 18 ADA | 3.20 ppb |
| 2018-05-09 | Q2DUNKIRK 18 HOY | 2.00 ppb |
| 2018-08-15 | Q3DUNKIRK 18 HOY | 7.80 ppb |
| 2018-08-15 | Q3DUNKIRK 18 ADA | 7.80 ppb |
| 2018-08-15 | Q3DUNKIRK 18 LAF | 8.50 ppb |
| 2018-08-15 | Q3DUNKIRK 18 ST | 8.30 ppb |
| 2018-11-20 | Q4 18 LAFAYETTE | 4.00 ppb |
| 2018-11-20 | Q4 18 HOYT DBPS | 2.90 ppb |
| 2018-11-20 | Q4 18 FISHERIES | 2.80 ppb |
| 2018-11-20 | Q4 18 SENIOR CTR | 3.00 ppb |
| 2019-02-13 | Q1 19 LAFAYETTE | 2.50 ppb |
| 2019-02-13 | Q1 19 SENIOR CTR | 2.00 ppb |
| 2019-02-13 | Q1 19 344 HOYT D | 2.10 ppb |
| 2019-02-13 | Q1 19 FISHERIES | 2.40 ppb |
| 2019-05-08 | Q2 19 LAFAYETTE | 3.90 ppb |
| 2019-05-08 | Q2 19 SENIOR CTR | 4.00 ppb |
| 2019-05-08 | Q2 19 344 HOYT D | 0.650 ppb |
| 2019-05-08 | Q2 19 FISHERIES | 3.50 ppb |
| 2019-08-28 | Q3 19 344 HOYT D | 5.40 ppb |
| 2019-08-28 | Q3 19 FISHERIES | 4.60 ppb |
| 2019-08-28 | Q3 19 LAFAYETTE | 4.60 ppb |
| 2019-08-28 | Q3 19 SENIOR CTR | 4.90 ppb |
| 2019-11-13 | Q4 19 344 HOYT D | 3.80 ppb |
| 2019-11-13 | Q4 19 SENIOR CTR | 3.30 ppb |
| 2019-11-13 | Q4 19 FISHERIES | 3.20 ppb |
| 2019-11-13 | Q4 19 LAFAYETTE | 3.80 ppb |