Dibromoacetic acid
City of Sunnyvale
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.
178
Samples
0
Samples exceeding legal limit (MCL)
111
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 6.71 ppb | 32 | 23 | ND - 19.0 ppb |
| 2015 | 6.18 ppb | 32 | 23 | ND - 11.0 ppb |
| 2016 | 4.40 ppb | 32 | 22 | ND - 13.0 ppb |
| 2017 | 1.06 ppb | 32 | 13 | ND - 3.80 ppb |
| 2018 | 3.36 ppb | 24 | 16 | ND - 7.40 ppb |
| 2019 | 1.45 ppb | 26 | 14 | ND - 7.20 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 |
|---|---|---|
| 2014-03-05 | 5810-900-1045 | 16.0 ppb |
| 2014-03-05 | 5810-901-0815 | 15.0 ppb |
| 2014-03-05 | 5810-902-0738 | ND |
| 2014-03-05 | 5810-903-1033 | 19.0 ppb |
| 2014-03-05 | 5810-904-1110 | 18.0 ppb |
| 2014-03-05 | 5810-905-1100 | 18.0 ppb |
| 2014-03-05 | 5810-906-1020 | 5.70 ppb |
| 2014-03-05 | 5810-907-0715 | ND |
| 2014-05-14 | 5810-900-1228 | 3.30 ppb |
| 2014-05-14 | 5810-901-1140 | ND |
| 2014-05-14 | 5810-902-1106 | 1.40 ppb |
| 2014-05-14 | 5810-903-1218 | 4.30 ppb |
| 2014-05-14 | 5810-904-1251 | 4.70 ppb |
| 2014-05-14 | 5810-905-1242 | 6.10 ppb |
| 2014-05-14 | 5810-906-1205 | 2.70 ppb |
| 2014-05-14 | 5810-907-1054 | ND |
| 2014-08-06 | 5810-900-1115 | 2.80 ppb |
| 2014-08-06 | 5810-901-1020 | ND |
| 2014-08-06 | 5810-902-0950 | ND |
| 2014-08-06 | 5810-903-1100 | 11.0 ppb |
| 2014-08-06 | 5810-904-1145 | 11.0 ppb |
| 2014-08-06 | 5810-905-1125 | 11.0 ppb |
| 2014-08-06 | 5810-906-1045 | 8.70 ppb |
| 2014-08-06 | 5810-907-0920 | ND |
| 2014-11-12 | 5810-900-0955 | 9.90 ppb |
| 2014-11-12 | 5810-901-0925 | 11.0 ppb |
| 2014-11-12 | 5810-902-0908 | ND |
| 2014-11-12 | 5810-903-0945 | 10.00 ppb |
| 2014-11-12 | 5810-904-1041 | 11.0 ppb |
| 2014-11-12 | 5810-905-1017 | 12.0 ppb |
| 2014-11-12 | 5810-906-1056 | 2.00 ppb |
| 2014-11-12 | 5810-907-0850 | ND |
| 2015-03-10 | 5810-900-1052 | 8.50 ppb |
| 2015-03-10 | 5810-901-1005 | 10.00 ppb |
| 2015-03-10 | 5810-902-0955 | ND |
| 2015-03-10 | 5810-903-1025 | 10.00 ppb |
| 2015-03-10 | 5810-904-1120 | 11.0 ppb |
| 2015-03-10 | 5810-905-1113 | 11.0 ppb |
| 2015-03-10 | 5810-906-1038 | 8.00 ppb |
| 2015-03-10 | 5810-907-0930 | ND |
| 2015-05-05 | 5810-900-1025 | 8.60 ppb |
| 2015-05-05 | 5810-901-1152 | 11.0 ppb |
| 2015-05-05 | 5810-902-1210 | ND |
| 2015-05-05 | 5810-903-1050 | 8.30 ppb |
| 2015-05-05 | 5810-904-1303 | 9.80 ppb |
| 2015-05-05 | 5810-905-1150 | 9.50 ppb |
| 2015-05-05 | 5810-906-1110 | 3.00 ppb |
| 2015-05-05 | 5810-907-1235 | ND |
| 2015-08-19 | 5810-900-1235 | 6.10 ppb |
| 2015-08-19 | 5810-901-1130 | 9.30 ppb |
| 2015-08-19 | 5810-902-1035 | ND |
| 2015-08-19 | 5810-903-1210 | 4.20 ppb |
| 2015-08-19 | 5810-904-1300 | 8.00 ppb |
| 2015-08-19 | 5810-905-1245 | 8.20 ppb |
| 2015-08-19 | 5810-906-1155 | ND |
| 2015-08-19 | 5810-907-1010 | ND |
| 2015-10-28 | 5810-900-1208 | 11.0 ppb |
| 2015-10-28 | 5810-901-0901 | 11.0 ppb |
| 2015-10-28 | 5810-902-0845 | ND |
| 2015-10-28 | 5810-903-1035 | 7.50 ppb |
| 2015-10-28 | 5810-904-1225 | 11.0 ppb |
| 2015-10-28 | 5810-905-1217 | 11.0 ppb |
| 2015-10-28 | 5810-906-1047 | 1.60 ppb |
| 2015-10-28 | 5810-907-0825 | ND |
| 2016-03-02 | 5810-900-1035 | 6.50 ppb |
| 2016-03-02 | 5810-901-0843 | 5.70 ppb |
| 2016-03-02 | 5810-902-0915 | ND |
| 2016-03-02 | 5810-903-1020 | 6.40 ppb |
| 2016-03-02 | 5810-904-1100 | 5.90 ppb |
| 2016-03-02 | 5810-905-1045 | 6.10 ppb |
| 2016-03-02 | 5810-906-0940 | 1.40 ppb |
| 2016-03-02 | 5810-907-0810 | ND |
| 2016-05-04 | 5810-900-1020 | 2.30 ppb |
| 2016-05-04 | 5810-901-0930 | 13.0 ppb |
| 2016-05-04 | 5810-902-0912 | 2.90 ppb |
| 2016-05-04 | 5810-903-1005 | 12.0 ppb |
| 2016-05-04 | 5810-904-1050 | 12.0 ppb |
| 2016-05-04 | 5810-905-1030 | 2.40 ppb |
| 2016-05-04 | 5810-906-0955 | ND |
| 2016-05-04 | 5810-907-0900 | ND |
| 2016-08-10 | 5810-900-0900 | 2.00 ppb |
| 2016-08-10 | 5810-901-1010 | 6.70 ppb |
| 2016-08-10 | 5810-902-1110 | ND |
| 2016-08-10 | 5810-903-0920 | 7.20 ppb |
| 2016-08-10 | 5810-904-0810 | 6.10 ppb |
| 2016-08-10 | 5810-905-0827 | 1.90 ppb |
| 2016-08-10 | 5810-906-0938 | ND |
| 2016-08-10 | 5810-907-1040 | ND |
| 2016-10-12 | 5810-900-1020 | 2.10 ppb |
| 2016-10-12 | 5810-901-0920 | 11.0 ppb |
| 2016-10-12 | 5810-902-0849 | ND |
| 2016-10-12 | 5810-903-0945 | 8.10 ppb |
| 2016-10-12 | 5810-904-1100 | 9.90 ppb |
| 2016-10-12 | 5810-905-1035 | 9.30 ppb |
| 2016-10-12 | 5810-906-1005 | ND |
| 2016-10-12 | 5810-907-0825 | ND |
| 2017-02-15 | 5810-900-0840 | ND |
| 2017-02-15 | 5810-901-0955 | ND |
| 2017-02-15 | 5810-902-1050 | ND |
| 2017-02-15 | 5810-903-0900 | 1.90 ppb |
| 2017-02-15 | 5810-904-0810 | ND |
| 2017-02-15 | 5810-905-0825 | ND |
| 2017-02-15 | 5810-906-0915 | ND |
| 2017-02-15 | 5810-907-1020 | ND |
| 2017-05-24 | 5810-900-1100 | 3.00 ppb |
| 2017-05-24 | 5810-901-0950 | 3.70 ppb |
| 2017-05-24 | 5810-902-0935 | ND |
| 2017-05-24 | 5810-903-1050 | 3.30 ppb |
| 2017-05-24 | 5810-904-1130 | 3.00 ppb |
| 2017-05-24 | 5810-905-1115 | 3.10 ppb |
| 2017-05-24 | 5810-906-1031 | ND |
| 2017-05-24 | 5810-907-0915 | ND |
| 2017-08-23 | 5810-900-1130 | 1.50 ppb |
| 2017-08-23 | 5810-901-1025 | 3.80 ppb |
| 2017-08-23 | 5810-902-1000 | ND |
| 2017-08-23 | 5810-903-1115 | 2.90 ppb |
| 2017-08-23 | 5810-904-1155 | 2.70 ppb |
| 2017-08-23 | 5810-905-1145 | 2.80 ppb |
| 2017-08-23 | 5810-906-1055 | ND |
| 2017-08-23 | 5810-907-0940 | ND |
| 2017-11-15 | 5810-900-0955 | ND |
| 2017-11-15 | 5810-901-1055 | 1.10 ppb |
| 2017-11-15 | 5810-902-1120 | ND |
| 2017-11-15 | 5810-903-1010 | ND |
| 2017-11-15 | 5810-904-0915 | 1.20 ppb |
| 2017-11-15 | 5810-905-0935 | ND |
| 2017-11-15 | 5810-906-1025 | ND |
| 2017-11-15 | 5810-907-1145 | ND |
| 2018-02-21 | 5810-900-1005 | 4.40 ppb |
| 2018-02-21 | 5810-901-1047 | 1.30 ppb |
| 2018-02-21 | 5810-902-1104 | ND |
| 2018-02-21 | 5810-904-0955 | 5.50 ppb |
| 2018-02-21 | 5810-905-0930 | 5.50 ppb |
| 2018-02-21 | 5810-907-1117 | ND |
| 2018-02-28 | 5810-903-0936 | 5.10 ppb |
| 2018-02-28 | 5810-906-0948 | ND |
| 2018-08-15 | 5810-900-0935 | 4.50 ppb |
| 2018-08-15 | 5810-901-1016 | 4.80 ppb |
| 2018-08-15 | 5810-902-1035 | ND |
| 2018-08-15 | 5810-903-1002 | 4.10 ppb |
| 2018-08-15 | 5810-904-0930 | 4.60 ppb |
| 2018-08-15 | 5810-905-0908 | 4.50 ppb |
| 2018-08-15 | 5810-906-0948 | ND |
| 2018-08-15 | 5810-907-1050 | ND |
| 2018-11-14 | 5810-900-1005 | 7.00 ppb |
| 2018-11-14 | 5810-901-0916 | 7.40 ppb |
| 2018-11-14 | 5810-902-0900 | ND |
| 2018-11-14 | 5810-903-0939 | 7.00 ppb |
| 2018-11-14 | 5810-904-1030 | 7.00 ppb |
| 2018-11-14 | 5810-905-1012 | 6.40 ppb |
| 2018-11-14 | 5810-906-0947 | 1.60 ppb |
| 2018-11-14 | 5810-907-0830 | ND |
| 2019-01-30 | 5810-900-1020 | 2.50 ppb |
| 2019-01-30 | 5810-901-0910 | 7.20 ppb |
| 2019-01-30 | 5810-902-0848 | 1.50 ppb |
| 2019-01-30 | 5810-903-0945 | 2.60 ppb |
| 2019-01-30 | 5810-904-1050 | 5.80 ppb |
| 2019-01-30 | 5810-905-1035 | 2.50 ppb |
| 2019-01-30 | 5810-906-1000 | 3.40 ppb |
| 2019-01-30 | 5810-907-0835 | ND |
| 2019-05-22 | 5810-900-0915 | 4.00 ppb |
| 2019-05-22 | 5810-901-0845 | ND |
| 2019-09-11 | 5810-900-0910 | 1.000 ppb |
| 2019-09-11 | 5810-901-0835 | 1.20 ppb |
| 2019-09-11 | 5810-902-0820 | ND |
| 2019-09-11 | 5810-903-0955 | ND |
| 2019-09-11 | 5810-904-0940 | 1.10 ppb |
| 2019-09-11 | 5810-905-0930 | ND |
| 2019-09-11 | 5810-906-1010 | ND |
| 2019-09-11 | 5810-907-0800 | ND |
| 2019-11-20 | 5810-900-0915 | ND |
| 2019-11-20 | 5810-901-0850 | ND |
| 2019-11-20 | 5810-902-0815 | ND |
| 2019-11-20 | 5810-903-0948 | 1.20 ppb |
| 2019-11-20 | 5810-904-0933 | 2.80 ppb |
| 2019-11-20 | 5810-905-0920 | ND |
| 2019-11-20 | 5810-906-0958 | 1.000 ppb |
| 2019-11-20 | 5810-907-0830 | ND |