Dibromoacetic acid
Johnston Municipal Water Supply
Dibromoacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.
100
Samples
0
Samples exceeding legal limit (MCL)
88
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 1.91 ppb | 16 | 15 | ND - 3.09 ppb |
| 2015 | 1.42 ppb | 16 | 13 | ND - 2.41 ppb |
| 2016 | 1.57 ppb | 16 | 16 | 0.910 ppb - 2.69 ppb |
| 2017 | 1.50 ppb | 16 | 15 | ND - 2.71 ppb |
| 2018 | 0.845 ppb | 16 | 11 | ND - 2.40 ppb |
| 2019 | 1.35 ppb | 20 | 18 | ND - 2.96 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.04 ppb
The EWG Health Guideline of 0.04 ppb for dibromoacetic acid was defined in a peer-reviewed scientific study by EWG and represents a on-in-a-million lifetime cancer risk level. This health guideline protects against cancer.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2014-02-11 | 2036125 | 2.93 ppb |
| 2014-02-11 | 2036124 | 3.09 ppb |
| 2014-02-11 | 2036127 | 2.57 ppb |
| 2014-02-11 | 2036126 | 2.51 ppb |
| 2014-05-13 | 2052508 | 2.86 ppb |
| 2014-05-13 | 2052511 | 2.98 ppb |
| 2014-05-13 | 2052509 | 2.93 ppb |
| 2014-05-13 | 2052510 | 2.89 ppb |
| 2014-08-11 | 2072256 | ND |
| 2014-08-11 | 2072257 | 0.570 ppb |
| 2014-08-11 | 2072258 | 1.37 ppb |
| 2014-08-11 | 2072259 | 0.500 ppb |
| 2014-11-17 | 2093853 | 0.580 ppb |
| 2014-11-17 | 2093854 | 1.39 ppb |
| 2014-11-17 | 2093855 | 1.69 ppb |
| 2014-11-17 | 2093856 | 1.66 ppb |
| 2015-02-09 | 1B50515-01 | 1.41 ppb |
| 2015-02-09 | 1B50515-04 | 2.38 ppb |
| 2015-02-09 | 1B50515-03 | 2.30 ppb |
| 2015-02-09 | 1B50515-02 | 1.72 ppb |
| 2015-05-12 | 1E50706-01 | 0.950 ppb |
| 2015-05-12 | 1E50706-02 | 2.26 ppb |
| 2015-05-12 | 1E50706-03 | 1.18 ppb |
| 2015-05-12 | 1E50706-04 | 2.41 ppb |
| 2015-08-10 | 1H50713-01 | ND |
| 2015-08-10 | 1H50713-02 | 2.24 ppb |
| 2015-08-10 | 1H50713-04 | ND |
| 2015-08-10 | 1H50713-03 | ND |
| 2015-11-09 | 1K50689-01 | 0.990 ppb |
| 2015-11-09 | 1K50689-02 | 1.93 ppb |
| 2015-11-09 | 1K50689-03 | 1.41 ppb |
| 2015-11-09 | 1K50689-04 | 1.53 ppb |
| 2016-02-08 | 1B60495-01 | 2.51 ppb |
| 2016-02-08 | 1B60495-02 | 2.69 ppb |
| 2016-02-08 | 1B60495-03 | 2.54 ppb |
| 2016-02-08 | 1B60495-04 | 1.58 ppb |
| 2016-05-09 | 1E60708-03 | 1.01 ppb |
| 2016-05-09 | 1E60708-04 | 0.910 ppb |
| 2016-05-09 | 1E60708-02 | 1.24 ppb |
| 2016-05-09 | 1E60708-01 | 1.06 ppb |
| 2016-08-09 | 1H60712-01 | 0.960 ppb |
| 2016-08-09 | 1H60712-02 | 0.910 ppb |
| 2016-08-09 | 1H60712-03 | 1.84 ppb |
| 2016-08-09 | 1H60712-04 | 1.52 ppb |
| 2016-11-08 | 1K60675-01 | 1.000 ppb |
| 2016-11-08 | 1K60675-02 | 1.41 ppb |
| 2016-11-08 | 1K60675-03 | 1.92 ppb |
| 2016-11-08 | 1K60675-04 | 2.08 ppb |
| 2017-02-06 | 1B70432-04 | 2.35 ppb |
| 2017-02-06 | 1B70432-03 | 2.35 ppb |
| 2017-02-06 | 1B70432-01 | 2.06 ppb |
| 2017-02-06 | 1B70432-02 | 1.03 ppb |
| 2017-05-09 | 1E70770-01 | 0.690 ppb |
| 2017-05-09 | 1E70770-02 | ND |
| 2017-05-09 | 1E70770-03 | 1.38 ppb |
| 2017-05-09 | 1E70770-04 | 1.16 ppb |
| 2017-08-08 | 1H71209-04 | 2.71 ppb |
| 2017-08-08 | 1H71209-03 | 2.26 ppb |
| 2017-08-08 | 1H71209-02 | 0.760 ppb |
| 2017-08-08 | 1H71209-01 | 0.970 ppb |
| 2017-11-13 | 1K71083-01 | 0.670 ppb |
| 2017-11-13 | 1K71083-02 | 1.81 ppb |
| 2017-11-13 | 1K71083-03 | 2.07 ppb |
| 2017-11-13 | 1K71083-04 | 1.78 ppb |
| 2018-02-06 | 1B80339-04 | 2.40 ppb |
| 2018-02-06 | 1B80339-03 | 2.27 ppb |
| 2018-02-06 | 1B80339-02 | 1.22 ppb |
| 2018-02-06 | 1B80339-01 | 1.90 ppb |
| 2018-05-08 | 1E80685-04 | ND |
| 2018-05-08 | 1E80685-01 | ND |
| 2018-05-08 | 1E80685-02 | 0.600 ppb |
| 2018-05-08 | 1E80685-03 | ND |
| 2018-08-14 | 1H81206-01 | ND |
| 2018-08-14 | 1H81206-02 | ND |
| 2018-08-14 | 1H81206-03 | 0.630 ppb |
| 2018-08-14 | 1H81206-04 | 0.311 ppb |
| 2018-11-13 | 1K80985-01 | 0.600 ppb |
| 2018-11-13 | 1K80985-02 | 0.451 ppb |
| 2018-11-13 | 1K80985-03 | 1.51 ppb |
| 2018-11-13 | 1K80985-04 | 1.63 ppb |
| 2019-02-13 | 1B90883-01 | 2.58 ppb |
| 2019-02-13 | 1B90883-02 | 1.46 ppb |
| 2019-02-13 | 1B90883-03 | 1.40 ppb |
| 2019-02-13 | 1B90883-04 | 2.50 ppb |
| 2019-05-15 | 1E91750-01 | 0.436 ppb |
| 2019-05-15 | 1E91750-02 | ND |
| 2019-05-15 | 1E91750-03 | 1.74 ppb |
| 2019-05-15 | 1E91750-04 | 1.82 ppb |
| 2019-07-16 | 1G91380-01 | 0.408 ppb |
| 2019-07-16 | 1G91380-04 | 0.770 ppb |
| 2019-07-16 | 1G91380-03 | 1.49 ppb |
| 2019-07-16 | 1G91380-02 | ND |
| 2019-08-13 | 1H90989-02 | 0.385 ppb |
| 2019-08-13 | 1H90989-04 | 1.56 ppb |
| 2019-08-13 | 1H90989-03 | 2.96 ppb |
| 2019-08-13 | 1H90989-01 | 1.43 ppb |
| 2019-11-12 | 1K90835-04 | 2.29 ppb |
| 2019-11-12 | 1K90835-03 | 1.98 ppb |
| 2019-11-12 | 1K90835-02 | 0.890 ppb |
| 2019-11-12 | 1K90835-01 | 0.980 ppb |