Dibromochloromethane
Altoona 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)
185
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 | 1.51 ppb | 32 | 31 | ND - 2.37 ppb |
| 2015 | 1.53 ppb | 32 | 31 | ND - 2.60 ppb |
| 2016 | 1.23 ppb | 32 | 28 | ND - 2.79 ppb |
| 2017 | 1.37 ppb | 32 | 32 | 0.690 ppb - 2.18 ppb |
| 2018 | 1.36 ppb | 32 | 32 | 0.610 ppb - 2.13 ppb |
| 2019 | 1.66 ppb | 32 | 31 | ND - 2.62 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 |
|---|---|---|
| 2014-02-12 | 4B12047-01 | 1.16 ppb |
| 2014-02-12 | 4B12047-02 | 0.720 ppb |
| 2014-02-12 | 4B12047-03 | 1.25 ppb |
| 2014-02-12 | 4B12047-04 | 1.71 ppb |
| 2014-02-12 | 4B12047-05 | 1.43 ppb |
| 2014-02-12 | 4B12047-06 | 1.17 ppb |
| 2014-02-12 | 4B12047-07 | 1.93 ppb |
| 2014-02-12 | 4B12047-08 | ND |
| 2014-05-14 | 4E14043-01 | 1.97 ppb |
| 2014-05-14 | 4E14043-02 | 0.860 ppb |
| 2014-05-14 | 4E14043-03 | 1.87 ppb |
| 2014-05-14 | 4E14043-04 | 1.98 ppb |
| 2014-05-14 | 4E14043-05 | 1.12 ppb |
| 2014-05-14 | 4E14043-06 | 1.83 ppb |
| 2014-05-14 | 4E14043-07 | 1.28 ppb |
| 2014-05-14 | 4E14043-08 | 1.86 ppb |
| 2014-08-14 | 4H14064-01 | 1.96 ppb |
| 2014-08-14 | 4H14064-02 | 1.89 ppb |
| 2014-08-14 | 4H14064-03 | 1.96 ppb |
| 2014-08-14 | 4H14064-04 | 2.37 ppb |
| 2014-08-14 | 4H14064-05 | 1.60 ppb |
| 2014-08-14 | 4H14064-06 | 1.98 ppb |
| 2014-08-14 | 4H14064-07 | 1.44 ppb |
| 2014-08-14 | 4H14064-08 | 2.03 ppb |
| 2014-11-13 | 4K13027-01 | 1.44 ppb |
| 2014-11-13 | 4K13027-02 | 0.750 ppb |
| 2014-11-13 | 4K13027-03 | 1.25 ppb |
| 2014-11-13 | 4K13027-04 | 2.08 ppb |
| 2014-11-13 | 4K13027-05 | 1.38 ppb |
| 2014-11-13 | 4K13027-06 | 1.12 ppb |
| 2014-11-13 | 4K13027-07 | 1.59 ppb |
| 2014-11-13 | 4K13027-08 | 1.31 ppb |
| 2015-02-12 | 12443612 | 1.02 ppb |
| 2015-02-12 | 12443611 | ND |
| 2015-02-12 | 12443613 | 1.10 ppb |
| 2015-02-12 | 12443618 | 1.40 ppb |
| 2015-02-12 | 12443614 | 1.12 ppb |
| 2015-02-12 | 12443617 | 1.37 ppb |
| 2015-02-12 | 12443615 | 1.29 ppb |
| 2015-02-12 | 12443616 | 1.29 ppb |
| 2015-05-14 | 12799379 | 1.67 ppb |
| 2015-05-14 | 12799373 | 0.780 ppb |
| 2015-05-14 | 12799377 | 1.29 ppb |
| 2015-05-14 | 12799380 | 1.75 ppb |
| 2015-05-14 | 12799374 | 0.990 ppb |
| 2015-05-14 | 12799378 | 1.58 ppb |
| 2015-05-14 | 12799376 | 1.22 ppb |
| 2015-05-14 | 12799375 | 1.16 ppb |
| 2015-08-13 | 13181678 | 2.01 ppb |
| 2015-08-13 | 13181673 | 1.40 ppb |
| 2015-08-13 | 13181677 | 2.00 ppb |
| 2015-08-13 | 13181680 | 2.55 ppb |
| 2015-08-13 | 13181675 | 1.52 ppb |
| 2015-08-13 | 13181676 | 1.85 ppb |
| 2015-08-13 | 13181679 | 2.23 ppb |
| 2015-08-13 | 13181674 | 1.51 ppb |
| 2015-11-12 | 13558163 | 1.56 ppb |
| 2015-11-12 | 13558162 | 1.38 ppb |
| 2015-11-12 | 13558166 | 1.73 ppb |
| 2015-11-12 | 13558168 | 2.27 ppb |
| 2015-11-12 | 13558164 | 1.69 ppb |
| 2015-11-12 | 13558165 | 1.69 ppb |
| 2015-11-12 | 13558169 | 2.60 ppb |
| 2015-11-12 | 13558167 | 1.80 ppb |
| 2016-02-11 | 13913478 | 1.16 ppb |
| 2016-02-11 | 13913472 | ND |
| 2016-02-11 | 13913474 | 0.970 ppb |
| 2016-02-11 | 13913479 | 1.30 ppb |
| 2016-02-11 | 13913476 | 1.02 ppb |
| 2016-02-11 | 13913475 | 1.01 ppb |
| 2016-02-11 | 13913477 | 1.15 ppb |
| 2016-02-11 | 13913473 | 0.550 ppb |
| 2016-05-12 | 14308750 | 0.710 ppb |
| 2016-05-12 | 14308744 | ND |
| 2016-05-12 | 14308748 | 0.620 ppb |
| 2016-05-12 | 14308751 | 0.890 ppb |
| 2016-05-12 | 14308746 | 0.570 ppb |
| 2016-05-12 | 14308747 | 0.590 ppb |
| 2016-05-12 | 14308749 | 0.650 ppb |
| 2016-05-12 | 14308745 | ND |
| 2016-08-11 | 14799316 | 2.39 ppb |
| 2016-08-11 | 14799318 | 2.47 ppb |
| 2016-08-11 | 14799319 | 2.50 ppb |
| 2016-08-11 | 14799320 | 2.62 ppb |
| 2016-08-11 | 14799321 | 2.79 ppb |
| 2016-08-11 | 14799315 | 2.37 ppb |
| 2016-08-11 | 14799314 | ND |
| 2016-08-11 | 14799317 | 2.45 ppb |
| 2016-11-10 | 15279179 | 1.68 ppb |
| 2016-11-10 | 15279176 | 1.35 ppb |
| 2016-11-10 | 15279174 | 0.890 ppb |
| 2016-11-10 | 15279178 | 1.55 ppb |
| 2016-11-10 | 15279177 | 1.45 ppb |
| 2016-11-10 | 15279173 | 0.790 ppb |
| 2016-11-10 | 15279180 | 1.76 ppb |
| 2016-11-10 | 15279175 | 1.09 ppb |
| 2017-02-16 | 15706103 | 1.27 ppb |
| 2017-02-16 | 15706098 | 0.720 ppb |
| 2017-02-16 | 15706099 | 0.810 ppb |
| 2017-02-16 | 15706105 | 1.87 ppb |
| 2017-02-16 | 15706100 | 1.02 ppb |
| 2017-02-16 | 15706101 | 1.04 ppb |
| 2017-02-16 | 15706102 | 1.04 ppb |
| 2017-02-16 | 15706104 | 1.39 ppb |
| 2017-05-11 | 16155085 | 1.86 ppb |
| 2017-05-11 | 16155078 | 0.690 ppb |
| 2017-05-11 | 16155080 | 0.990 ppb |
| 2017-05-11 | 16155083 | 1.48 ppb |
| 2017-05-11 | 16155084 | 1.54 ppb |
| 2017-05-11 | 16155082 | 1.18 ppb |
| 2017-05-11 | 16155081 | 1.03 ppb |
| 2017-05-11 | 16155079 | 0.760 ppb |
| 2017-08-17 | 16624956 | 2.01 ppb |
| 2017-08-17 | 16624953 | 1.67 ppb |
| 2017-08-17 | 16624959 | 2.18 ppb |
| 2017-08-17 | 16624958 | 2.07 ppb |
| 2017-08-17 | 16624955 | 1.89 ppb |
| 2017-08-17 | 16624957 | 2.01 ppb |
| 2017-08-17 | 16624954 | 1.84 ppb |
| 2017-08-17 | 16624952 | 1.37 ppb |
| 2017-11-16 | 17073752 | 1.24 ppb |
| 2017-11-16 | 17073748 | 0.780 ppb |
| 2017-11-16 | 17073750 | 1.19 ppb |
| 2017-11-16 | 17073754 | 1.55 ppb |
| 2017-11-16 | 17073755 | 1.62 ppb |
| 2017-11-16 | 17073751 | 1.19 ppb |
| 2017-11-16 | 17073753 | 1.48 ppb |
| 2017-11-16 | 17073749 | 1.10 ppb |
| 2018-02-13 | 8B13050-01 | 1.28 ppb |
| 2018-02-13 | 8B13050-02 | 0.610 ppb |
| 2018-02-13 | 8B13050-03 | 0.880 ppb |
| 2018-02-13 | 8B13050-04 | 1.58 ppb |
| 2018-02-13 | 8B13050-05 | 0.950 ppb |
| 2018-02-13 | 8B13050-06 | 1.42 ppb |
| 2018-02-13 | 8B13050-07 | 1.08 ppb |
| 2018-02-13 | 8B13050-08 | 1.17 ppb |
| 2018-05-15 | 8E15174-01 | 1.63 ppb |
| 2018-05-15 | 8E15174-02 | 0.710 ppb |
| 2018-05-15 | 8E15174-03 | 1.45 ppb |
| 2018-05-15 | 8E15174-04 | 1.82 ppb |
| 2018-05-15 | 8E15174-05 | 1.27 ppb |
| 2018-05-15 | 8E15174-06 | 1.94 ppb |
| 2018-05-15 | 8E15174-07 | 1.39 ppb |
| 2018-05-15 | 8E15174-08 | 1.68 ppb |
| 2018-08-15 | 8H15062-01 | 1.67 ppb |
| 2018-08-15 | 8H15062-02 | 1.45 ppb |
| 2018-08-15 | 8H15062-03 | 1.28 ppb |
| 2018-08-15 | 8H15062-04 | 1.52 ppb |
| 2018-08-15 | 8H15062-05 | 1.32 ppb |
| 2018-08-15 | 8H15062-06 | 1.46 ppb |
| 2018-08-15 | 8H15062-07 | 1.27 ppb |
| 2018-08-15 | 8H15062-08 | 1.47 ppb |
| 2018-11-14 | 8K14050-01 | 1.46 ppb |
| 2018-11-14 | 8K14050-02 | 1.18 ppb |
| 2018-11-14 | 8K14050-03 | 1.15 ppb |
| 2018-11-14 | 8K14050-04 | 2.13 ppb |
| 2018-11-14 | 8K14050-05 | 1.27 ppb |
| 2018-11-14 | 8K14050-06 | 1.57 ppb |
| 2018-11-14 | 8K14050-07 | 1.58 ppb |
| 2018-11-14 | 8K14050-08 | 0.970 ppb |
| 2019-02-14 | 9B14162-01 | 1.11 ppb |
| 2019-02-14 | 9B14162-02 | ND |
| 2019-02-14 | 9B14162-03 | 1.19 ppb |
| 2019-02-14 | 9B14162-04 | 1.61 ppb |
| 2019-02-14 | 9B14162-05 | 1.42 ppb |
| 2019-02-14 | 9B14162-06 | 0.620 ppb |
| 2019-02-14 | 9B14162-07 | 1.18 ppb |
| 2019-02-14 | 9B14162-08 | 1.18 ppb |
| 2019-05-15 | 9E15064-01 | 2.01 ppb |
| 2019-05-15 | 9E15064-02 | 1.53 ppb |
| 2019-05-15 | 9E15064-03 | 1.37 ppb |
| 2019-05-15 | 9E15064-04 | 2.10 ppb |
| 2019-05-15 | 9E15064-05 | 1.58 ppb |
| 2019-05-15 | 9E15064-06 | 1.45 ppb |
| 2019-05-15 | 9E15064-07 | 1.24 ppb |
| 2019-05-15 | 9E15064-08 | 1.44 ppb |
| 2019-08-14 | 9H14123-01 | 2.16 ppb |
| 2019-08-14 | 9H14123-02 | 1.74 ppb |
| 2019-08-14 | 9H14123-03 | 1.82 ppb |
| 2019-08-14 | 9H14123-04 | 2.62 ppb |
| 2019-08-14 | 9H14123-05 | 2.17 ppb |
| 2019-08-14 | 9H14123-06 | 2.07 ppb |
| 2019-08-14 | 9H14123-07 | 2.16 ppb |
| 2019-08-14 | 9H14123-08 | 2.37 ppb |
| 2019-11-14 | 9K14096-01 | 2.03 ppb |
| 2019-11-14 | 9K14096-02 | 1.48 ppb |
| 2019-11-14 | 9K14096-03 | 1.55 ppb |
| 2019-11-14 | 9K14096-04 | 2.41 ppb |
| 2019-11-14 | 9K14096-05 | 1.45 ppb |
| 2019-11-14 | 9K14096-06 | 1.97 ppb |
| 2019-11-14 | 9K14096-07 | 2.12 ppb |
| 2019-11-14 | 9K14096-08 | 1.89 ppb |