Bromide
Zone 7 Water Agency
Bromide is a naturally occurring element found in surface waters and groundwater. During drinking water treatment, bromide can combine with chlorine or other disinfectants, contributing to the formation of toxic tap water disinfection byproducts.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 257.7 ppb | 39 | 39 | 120.0 ppb - 480.0 ppb |
2015 | 217.9 ppb | 29 | 29 | 90.0 ppb - 360.0 ppb |
2016 | 217.0 ppb | 47 | 47 | 50.0 ppb - 600.0 ppb |
2017 | 181.7 ppb | 42 | 36 | ND - 580.0 ppb |
2018 | 253.3 ppb | 51 | 50 | ND - 680.0 ppb |
2019 | 219.6 ppb | 56 | 54 | ND - 550.0 ppb |
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-01-06 | 5100-001-0945 | 170.0 ppb |
2014-01-06 | 5100-006-1120 | 380.0 ppb |
2014-01-06 | 5100-008-0915 | 200.0 ppb |
2014-01-06 | 5100-012-1240 | 480.0 ppb |
2014-02-03 | 5100-001-1025 | 270.0 ppb |
2014-02-18 | 5100-008-0950 | 250.0 ppb |
2014-03-24 | 5100-001-1000 | 120.0 ppb |
2014-03-24 | 5100-008-1045 | 150.0 ppb |
2014-04-07 | 5100-001-0940 | 130.0 ppb |
2014-04-07 | 5100-008-1120 | 140.0 ppb |
2014-05-05 | 5100-001-0930 | 130.0 ppb |
2014-05-05 | 5100-008-1035 | 130.0 ppb |
2014-06-09 | 5100-001-1000 | 120.0 ppb |
2014-06-09 | 5100-008-1035 | 130.0 ppb |
2014-06-10 | 5100-005-1000 | 230.0 ppb |
2014-06-10 | 5100-011-1040 | 270.0 ppb |
2014-06-11 | 5100-006-0825 | 400.0 ppb |
2014-06-11 | 5100-013-0930 | 420.0 ppb |
2014-06-16 | 5100-007-0910 | 350.0 ppb |
2014-06-17 | 5100-012-1125 | 460.0 ppb |
2014-06-19 | 5100-019-0935 | 190.0 ppb |
2014-07-07 | 5100-001-1000 | 250.0 ppb |
2014-07-07 | 5100-008-1015 | 250.0 ppb |
2014-08-04 | 5100-001-0950 | 260.0 ppb |
2014-08-04 | 5100-008-1035 | 280.0 ppb |
2014-08-11 | 5100-005-0920 | 280.0 ppb |
2014-08-11 | 5100-011-0940 | 260.0 ppb |
2014-09-08 | 5100-001-0840 | 180.0 ppb |
2014-09-08 | 5100-006-1150 | 410.0 ppb |
2014-09-09 | 5100-007-0930 | 380.0 ppb |
2014-09-10 | 5100-005-0830 | 290.0 ppb |
2014-09-10 | 5100-011-0800 | 270.0 ppb |
2014-10-06 | 5100-001-1110 | 150.0 ppb |
2014-10-06 | 5100-008-0825 | 270.0 ppb |
2014-11-03 | 5100-001-0935 | 300.0 ppb |
2014-11-03 | 5100-008-0930 | 300.0 ppb |
2014-11-13 | 5100-017-0905 | 200.0 ppb |
2014-12-08 | 5100-001-0905 | 300.0 ppb |
2014-12-08 | 5100-008-1045 | 300.0 ppb |
2015-01-05 | 5100-001-0935 | 180.0 ppb |
2015-01-05 | 5100-008-0945 | 190.0 ppb |
2015-02-02 | 5100-008-0955 | 90.0 ppb |
2015-03-02 | 5100-001-1005 | 120.0 ppb |
2015-03-03 | 5100-017-0825 | 150.0 ppb |
2015-03-24 | 5100-019-1005 | 190.0 ppb |
2015-04-13 | 5100-001-0850 | 110.0 ppb |
2015-04-13 | 5100-008-0840 | 110.0 ppb |
2015-05-04 | 5100-001-0945 | 120.0 ppb |
2015-05-04 | 5100-008-1025 | 110.0 ppb |
2015-06-22 | 5100-001-1100 | 340.0 ppb |
2015-06-22 | 5100-008-0845 | 240.0 ppb |
2015-06-24 | 5100-019-0845 | 180.0 ppb |
2015-06-25 | 5100-017-0955 | 130.0 ppb |
2015-06-26 | 5100-005-0905 | 280.0 ppb |
2015-06-26 | 5100-007-0930 | 360.0 ppb |
2015-07-06 | 5100-001-0855 | 340.0 ppb |
2015-07-06 | 5100-008-1036 | 310.0 ppb |
2015-08-03 | 5100-001-0920 | 330.0 ppb |
2015-08-03 | 5100-008-1010 | 320.0 ppb |
2015-09-08 | 5100-001-0930 | 280.0 ppb |
2015-09-08 | 5100-008-1030 | 300.0 ppb |
2015-09-10 | 5100-017-0910 | 170.0 ppb |
2015-10-05 | 5100-001-0950 | 260.0 ppb |
2015-10-05 | 5100-008-0920 | 280.0 ppb |
2015-11-02 | 5100-001-0927 | 180.0 ppb |
2015-11-02 | 5100-008-0925 | 220.0 ppb |
2015-11-23 | 5100-017-1110 | 160.0 ppb |
2015-12-07 | 5100-001-0930 | 270.0 ppb |
2016-01-04 | 5100-001-0930 | 310.0 ppb |
2016-02-01 | 5100-001-1405 | 170.0 ppb |
2016-02-03 | 5100-012-1050 | 420.0 ppb |
2016-02-09 | 5100-005-0855 | 280.0 ppb |
2016-02-09 | 5100-011-0842 | 250.0 ppb |
2016-03-03 | 5100-006-1100 | 410.0 ppb |
2016-03-03 | 5100-017-0935 | 180.0 ppb |
2016-03-07 | 5100-001-0925 | 70.0 ppb |
2016-03-29 | 5100-007-1245 | 360.0 ppb |
2016-03-30 | 5100-020-1030 | 90.0 ppb |
2016-04-04 | 5100-005-1044 | 250.0 ppb |
2016-04-04 | 5100-008-0905 | 60.0 ppb |
2016-04-04 | 5100-013-1425 | 600.0 ppb |
2016-04-04 | 5100-019-1135 | 150.0 ppb |
2016-04-06 | 5100-012-1105 | 440.0 ppb |
2016-04-06 | 5100-020-1155 | 180.0 ppb |
2016-05-02 | 5100-019-1225 | 200.0 ppb |
2016-05-04 | 5100-001-0825 | 50.0 ppb |
2016-05-04 | 5100-008-1200 | 50.0 ppb |
2016-05-19 | 5100-007-0900 | 350.0 ppb |
2016-05-19 | 5100-017-0945 | 130.0 ppb |
2016-05-19 | 5100-020-1058 | 140.0 ppb |
2016-06-02 | 5100-005-0820 | 260.0 ppb |
2016-06-06 | 5100-001-0935 | 60.0 ppb |
2016-06-06 | 5100-008-1025 | 60.0 ppb |
2016-07-11 | 5100-001-0920 | 90.0 ppb |
2016-07-11 | 5100-007-1220 | 420.0 ppb |
2016-07-11 | 5100-008-1010 | 80.0 ppb |
2016-07-11 | 5100-020-1317 | 240.0 ppb |
2016-07-13 | 5100-017-1035 | 180.0 ppb |
2016-07-13 | 5100-019-0920 | 170.0 ppb |
2016-08-01 | 5100-001-1005 | 100.0 ppb |
2016-08-01 | 5100-008-0955 | 100.0 ppb |
2016-08-01 | 5100-020-1340 | 210.0 ppb |
2016-08-10 | 5100-005-1250 | 260.0 ppb |
2016-09-12 | 5100-001-0955 | 210.0 ppb |
2016-09-12 | 5100-008-1025 | 190.0 ppb |
2016-09-19 | 5100-007-1130 | 440.0 ppb |
2016-09-19 | 5100-017-1207 | 200.0 ppb |
2016-10-10 | 5100-001-0915 | 290.0 ppb |
2016-10-10 | 5100-008-0930 | 280.0 ppb |
2016-10-13 | 5100-012-1400 | 400.0 ppb |
2016-11-07 | 5100-001-1117 | 70.0 ppb |
2016-11-07 | 5100-008-1115 | 280.0 ppb |
2016-11-14 | 5100-017-1045 | 170.0 ppb |
2016-12-05 | 5100-001-0900 | 50.0 ppb |
2016-12-05 | 5100-008-0925 | 250.0 ppb |
2017-01-04 | 5100-013-1000 | 580.0 ppb |
2017-01-04 | 5100-017-0945 | 180.0 ppb |
2017-01-23 | 5100-008-0930 | 100.0 ppb |
2017-01-23 | 5100-012-1030 | 470.0 ppb |
2017-01-23 | 5100-020-1125 | 180.0 ppb |
2017-02-14 | 5100-008-1023 | 40.0 ppb |
2017-02-14 | 5100-020-1455 | 120.0 ppb |
2017-02-15 | 5100-001-1045 | 40.0 ppb |
2017-03-13 | 5100-001-0900 | ND |
2017-04-10 | 5100-001-0910 | ND |
2017-04-12 | 5100-017-1110 | 150.0 ppb |
2017-05-01 | 5100-001-0930 | ND |
2017-05-01 | 5100-008-1128 | 40.0 ppb |
2017-06-05 | 5100-001-0910 | 20.0 ppb |
2017-06-05 | 5100-006-1410 | 450.0 ppb |
2017-06-05 | 5100-007-1420 | 430.0 ppb |
2017-06-05 | 5100-008-1004 | ND |
2017-07-10 | 5100-007-1010 | 440.0 ppb |
2017-07-10 | 5100-019-1135 | 220.0 ppb |
2017-07-11 | 5100-001-0935 | ND |
2017-07-11 | 5100-008-0955 | ND |
2017-07-11 | 5100-017-1210 | 140.0 ppb |
2017-07-12 | 5100-012-0900 | 510.0 ppb |
2017-07-13 | 5100-013-0915 | 520.0 ppb |
2017-07-31 | 5100-020-1040 | 130.0 ppb |
2017-08-09 | 5100-001-1015 | 40.0 ppb |
2017-08-09 | 5100-008-1035 | 40.0 ppb |
2017-09-05 | 5100-001-0900 | 30.0 ppb |
2017-09-05 | 5100-008-0947 | 40.0 ppb |
2017-09-25 | 5100-005-1010 | 280.0 ppb |
2017-10-02 | 5100-001-0915 | 30.0 ppb |
2017-10-02 | 5100-008-1010 | 30.0 ppb |
2017-10-03 | 5100-005-1055 | 270.0 ppb |
2017-10-03 | 5100-013-1025 | 580.0 ppb |
2017-10-03 | 5100-017-0950 | 160.0 ppb |
2017-10-05 | 5100-006-0935 | 410.0 ppb |
2017-10-05 | 5100-007-1015 | 480.0 ppb |
2017-10-16 | 5100-019-1255 | 270.0 ppb |
2017-11-06 | 5100-001-0915 | 40.0 ppb |
2017-11-06 | 5100-008-1050 | 60.0 ppb |
2017-12-04 | 5100-001-0900 | 50.0 ppb |
2017-12-04 | 5100-008-0945 | 60.0 ppb |
2018-01-22 | 5100-001-0946 | 150.0 ppb |
2018-01-25 | 5100-005-1335 | 290.0 ppb |
2018-02-05 | 5100-012-0905 | 660.0 ppb |
2018-02-05 | 5100-013-0850 | 630.0 ppb |
2018-02-05 | 5100-017-0950 | 150.0 ppb |
2018-02-06 | 5100-001-0958 | 100.0 ppb |
2018-02-06 | 5100-005-0912 | 270.0 ppb |
2018-02-06 | 5100-011-0855 | 210.0 ppb |
2018-02-28 | 5100-006-0945 | 430.0 ppb |
2018-02-28 | 5100-008-1100 | 100.0 ppb |
2018-03-07 | 5100-001-1123 | 100.0 ppb |
2018-03-07 | 5100-008-1010 | 110.0 ppb |
2018-04-09 | 5100-001-1137 | 60.0 ppb |
2018-04-09 | 5100-008-1020 | 60.0 ppb |
2018-04-09 | 5100-017-1035 | 140.0 ppb |
2018-04-10 | 5100-005-1240 | 290.0 ppb |
2018-04-10 | 5100-011-1215 | 200.0 ppb |
2018-04-10 | 5100-019-0925 | 290.0 ppb |
2018-04-11 | 5100-006-1010 | 420.0 ppb |
2018-04-11 | 5100-012-1040 | 590.0 ppb |
2018-04-11 | 5100-013-0940 | 620.0 ppb |
2018-05-07 | 5100-001-1515 | 60.0 ppb |
2018-05-07 | 5100-008-1330 | 40.0 ppb |
2018-06-04 | 5100-001-0920 | 60.0 ppb |
2018-06-04 | 5100-008-1010 | 60.0 ppb |
2018-07-09 | 5100-001-1225 | 60.0 ppb |
2018-07-09 | 5100-005-1350 | 270.0 ppb |
2018-07-09 | 5100-008-0925 | 60.0 ppb |
2018-07-09 | 5100-013-0930 | 580.0 ppb |
2018-07-09 | 5100-017-1120 | 170.0 ppb |
2018-07-09 | 5100-019-1000 | 230.0 ppb |
2018-07-11 | 5100-006-0935 | 420.0 ppb |
2018-07-11 | 5100-011-0900 | 210.0 ppb |
2018-08-06 | 5100-001-0935 | 60.0 ppb |
2018-08-06 | 5100-008-0925 | 70.0 ppb |
2018-08-07 | 5100-007-0845 | 530.0 ppb |
2018-09-10 | 5100-001-0830 | 270.0 ppb |
2018-09-10 | 5100-008-0840 | 270.0 ppb |
2018-09-25 | 5100-020-1314 | 140.0 ppb |
2018-10-08 | 5100-001-0825 | 70.0 ppb |
2018-10-08 | 5100-008-0959 | 280.0 ppb |
2018-10-08 | 5100-012-1200 | 490.0 ppb |
2018-10-08 | 5100-019-1140 | 310.0 ppb |
2018-10-09 | 5100-017-0900 | 150.0 ppb |
2018-10-10 | 5100-007-1435 | 510.0 ppb |
2018-10-10 | 5100-020-1415 | 260.0 ppb |
2018-12-03 | 5100-008-1010 | 230.0 ppb |
2018-12-03 | 5100-020-1005 | ND |
2018-12-04 | 5100-013-0920 | 680.0 ppb |
2018-12-04 | 5100-019-1000 | 290.0 ppb |
2018-12-17 | 5100-001-0923 | 220.0 ppb |
2019-01-07 | 5100-005-1215 | 240.0 ppb |
2019-01-07 | 5100-008-1017 | 260.0 ppb |
2019-01-07 | 5100-012-1100 | 420.0 ppb |
2019-01-07 | 5100-017-1025 | 130.0 ppb |
2019-01-07 | 5100-020-1150 | 100.0 ppb |
2019-01-08 | 5100-007-0910 | 420.0 ppb |
2019-01-08 | 5100-011-1015 | 190.0 ppb |
2019-01-08 | 5100-019-0940 | 260.0 ppb |
2019-02-04 | 5100-008-1028 | 160.0 ppb |
2019-03-04 | 5100-008-0907 | 80.0 ppb |
2019-04-08 | 5100-007-1130 | 430.0 ppb |
2019-04-08 | 5100-008-0925 | 30.0 ppb |
2019-04-08 | 5100-017-0916 | 160.0 ppb |
2019-04-09 | 5100-006-0920 | 410.0 ppb |
2019-04-09 | 5100-012-0935 | 400.0 ppb |
2019-04-09 | 5100-013-0955 | 550.0 ppb |
2019-04-09 | 5100-019-1040 | 280.0 ppb |
2019-05-06 | 5100-001-0850 | 30.0 ppb |
2019-05-06 | 5100-008-1215 | 30.0 ppb |
2019-06-03 | 5100-001-0940 | ND |
2019-06-03 | 5100-008-0910 | ND |
2019-07-08 | 5100-005-1015 | 270.0 ppb |
2019-07-08 | 5100-007-0950 | 380.0 ppb |
2019-07-08 | 5100-011-0945 | 220.0 ppb |
2019-07-08 | 5100-013-1015 | 540.0 ppb |
2019-07-08 | 5100-020-1130 | 260.0 ppb |
2019-07-09 | 5100-006-1145 | 440.0 ppb |
2019-07-09 | 5100-017-0925 | 120.0 ppb |
2019-07-09 | 5100-019-1045 | 380.0 ppb |
2019-07-10 | 5100-001-1010 | 20.0 ppb |
2019-07-10 | 5100-008-1115 | 20.0 ppb |
2019-08-05 | 5100-001-1105 | 40.0 ppb |
2019-08-05 | 5100-008-0915 | 30.0 ppb |
2019-08-05 | 5100-012-0905 | 390.0 ppb |
2019-08-05 | 5100-020-0935 | 160.0 ppb |
2019-09-09 | 5100-001-0840 | 40.0 ppb |
2019-09-09 | 5100-008-1005 | 50.0 ppb |
2019-10-07 | 5100-001-1325 | 30.0 ppb |
2019-10-07 | 5100-005-1150 | 280.0 ppb |
2019-10-07 | 5100-006-0900 | 410.0 ppb |
2019-10-07 | 5100-007-0830 | 380.0 ppb |
2019-10-07 | 5100-008-1210 | 30.0 ppb |
2019-10-07 | 5100-011-1050 | 230.0 ppb |
2019-10-07 | 5100-012-1015 | 380.0 ppb |
2019-10-07 | 5100-013-0945 | 530.0 ppb |
2019-10-07 | 5100-020-0920 | 220.0 ppb |
2019-10-08 | 5100-017-0830 | 140.0 ppb |
2019-10-08 | 5100-019-1015 | 390.0 ppb |
2019-11-04 | 5100-001-0855 | 40.0 ppb |
2019-11-04 | 5100-008-1030 | 60.0 ppb |
2019-12-02 | 5100-008-1006 | 70.0 ppb |
2019-12-02 | 5100-020-0850 | 230.0 ppb |
2019-12-03 | 5100-017-1155 | 140.0 ppb |
2019-12-03 | 5100-019-1340 | 350.0 ppb |
2019-12-10 | 5100-017-1100 | 130.0 ppb |
2019-12-10 | 5100-019-0942 | 320.0 ppb |