Bromide
Los Angeles Department of Water and Power
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 |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 138.0 ppb | 27 | 27 | 39.0 ppb - 245.0 ppb |
2015 | 177.5 ppb | 39 | 39 | 139.0 ppb - 259.0 ppb |
2016 | 145.3 ppb | 44 | 44 | 84.4 ppb - 242.0 ppb |
2017 | 41.4 ppb | 16 | 12 | ND - 151.0 ppb |
2018 | 63.4 ppb | 50 | 50 | 22.3 ppb - 129.0 ppb |
2019 | 34.9 ppb | 43 | 36 | ND - 103.0 ppb |
ppb = parts per billion
All test results
Date | Lab ID | Result |
---|---|---|
2014-02-26 | 1200-011-1215 | 51.0 ppb |
2014-02-26 | 1200-133-1215 | 55.0 ppb |
2014-05-14 | 1200-011-1115 | 193.0 ppb |
2014-05-14 | 1200-133-1105 | 130.0 ppb |
2014-05-31 | 1200-205-0850 | 46.0 ppb |
2014-06-03 | 1200-205-0720 | 39.0 ppb |
2014-06-11 | 1200-133-0855 | 143.0 ppb |
2014-07-12 | 1200-205-0910 | 114.0 ppb |
2014-07-15 | 1200-205-0700 | 160.0 ppb |
2014-07-18 | 1200-133-0655 | 145.0 ppb |
2014-07-26 | 1200-133-0605 | 132.0 ppb |
2014-08-02 | 1200-133-0620 | 118.0 ppb |
2014-08-09 | 1200-133-0615 | 125.0 ppb |
2014-08-12 | 1200-011-1030 | 133.0 ppb |
2014-08-20 | 1200-133-0900 | 123.0 ppb |
2014-09-10 | 1200-205-1000 | 105.0 ppb |
2014-09-11 | 1200-205-0840 | 102.0 ppb |
2014-09-21 | 1200-133-0625 | 147.0 ppb |
2014-10-28 | 1200-205-0930 | 179.0 ppb |
2014-11-08 | 1200-133-0625 | 181.0 ppb |
2014-11-12 | 1200-011-1240 | 245.0 ppb |
2014-11-12 | 1200-205-0940 | 182.0 ppb |
2014-11-18 | 1200-133-0935 | 153.0 ppb |
2014-11-18 | 1200-205-1110 | 172.0 ppb |
2014-12-11 | 1200-133-0655 | 192.0 ppb |
2014-12-27 | 1200-133-0925 | 196.0 ppb |
2014-12-31 | 1200-133-0800 | 164.0 ppb |
2015-01-03 | 1200-205-0930 | 176.0 ppb |
2015-01-10 | 1200-205-0900 | 175.0 ppb |
2015-02-11 | 1200-133-0825 | 174.0 ppb |
2015-02-12 | 1200-205-0850 | 189.0 ppb |
2015-02-19 | 1200-011-0845 | 197.0 ppb |
2015-03-05 | 1200-205-0905 | 175.0 ppb |
2015-03-07 | 1200-133-0605 | 163.0 ppb |
2015-03-13 | 1200-133-0640 | 181.0 ppb |
2015-03-21 | 1200-205-0710 | 180.0 ppb |
2015-03-22 | 1200-133-0615 | 175.0 ppb |
2015-03-27 | 1200-133-0630 | 190.0 ppb |
2015-04-18 | 1200-205-0930 | 196.0 ppb |
2015-05-02 | 1200-205-0800 | 187.0 ppb |
2015-05-09 | 1200-205-1035 | 141.0 ppb |
2015-05-19 | 1200-011-0900 | 259.0 ppb |
2015-05-19 | 1200-133-1100 | 156.0 ppb |
2015-05-23 | 1200-133-0650 | 174.0 ppb |
2015-05-27 | 1200-133-1255 | 182.0 ppb |
2015-05-29 | 1200-133-0945 | 169.0 ppb |
2015-08-04 | 1200-011-1040 | 203.0 ppb |
2015-08-04 | 1200-133-0645 | 197.0 ppb |
2015-08-06 | 1200-205-0800 | 184.0 ppb |
2015-08-22 | 1200-133-1020 | 200.0 ppb |
2015-09-05 | 1200-205-0900 | 171.0 ppb |
2015-09-12 | 1200-205-0845 | 139.0 ppb |
2015-10-01 | 1200-133-0725 | 181.0 ppb |
2015-10-09 | 1200-205-1005 | 174.0 ppb |
2015-10-20 | 1200-205-1155 | 140.0 ppb |
2015-11-05 | 1200-011-1005 | 187.0 ppb |
2015-11-05 | 1200-133-0755 | 157.0 ppb |
2015-11-18 | 1200-205-0745 | 166.0 ppb |
2015-11-21 | 1200-205-0835 | 147.0 ppb |
2015-11-26 | 1200-133-1100 | 170.0 ppb |
2015-12-01 | 1200-205-1200 | 196.0 ppb |
2015-12-11 | 1200-133-0810 | 161.0 ppb |
2015-12-16 | 1200-205-1005 | 202.0 ppb |
2015-12-22 | 1200-205-0730 | 175.0 ppb |
2015-12-29 | 1200-133-0700 | 179.0 ppb |
2015-12-29 | 1200-205-1050 | 155.0 ppb |
2016-01-15 | 1200-133-1055 | 198.0 ppb |
2016-02-03 | 1200-133-0820 | 207.0 ppb |
2016-02-09 | 1200-133-0930 | 218.0 ppb |
2016-02-12 | 1200-205-0930 | 177.0 ppb |
2016-02-15 | 1200-205-1030 | 167.0 ppb |
2016-02-16 | 1200-205-0920 | 193.0 ppb |
2016-02-17 | 1200-133-1045 | 201.0 ppb |
2016-02-24 | 1200-011-1215 | 242.0 ppb |
2016-03-29 | 1200-205-1105 | 212.0 ppb |
2016-04-06 | 1200-205-0900 | 133.0 ppb |
2016-04-21 | 1200-133-1030 | 145.0 ppb |
2016-04-26 | 1200-205-0720 | 171.0 ppb |
2016-05-11 | 1200-133-0750 | 172.0 ppb |
2016-05-22 | 1200-205-0915 | 145.0 ppb |
2016-05-25 | 1200-011-1135 | 171.0 ppb |
2016-05-25 | 1200-133-1210 | 155.0 ppb |
2016-06-01 | 1200-133-0755 | 170.0 ppb |
2016-06-07 | 1200-133-0930 | 181.0 ppb |
2016-06-14 | 1200-133-0815 | 148.0 ppb |
2016-06-21 | 1200-205-1310 | 124.0 ppb |
2016-06-28 | 1200-133-1000 | 110.0 ppb |
2016-07-06 | 1200-133-0940 | 119.0 ppb |
2016-07-19 | 1200-205-0855 | 102.0 ppb |
2016-07-21 | 1200-205-1225 | 106.0 ppb |
2016-07-26 | 1200-205-0835 | 112.0 ppb |
2016-08-09 | 1200-205-0840 | 99.4 ppb |
2016-08-12 | 1200-205-0740 | 96.0 ppb |
2016-08-17 | 1200-011-1010 | 113.0 ppb |
2016-08-17 | 1200-205-1220 | 100.0 ppb |
2016-08-23 | 1200-133-1005 | 116.0 ppb |
2016-08-23 | 1200-205-1100 | 84.4 ppb |
2016-09-20 | 1200-205-0930 | 93.0 ppb |
2016-09-21 | 1200-133-0705 | 127.0 ppb |
2016-09-27 | 1200-205-1220 | 89.0 ppb |
2016-09-29 | 1200-205-1025 | 91.2 ppb |
2016-10-18 | 1200-205-0640 | 115.0 ppb |
2016-10-26 | 1200-133-1245 | 162.0 ppb |
2016-11-01 | 1200-205-0730 | 118.0 ppb |
2016-11-21 | 1200-133-1115 | 150.0 ppb |
2016-11-22 | 1200-205-1050 | 126.0 ppb |
2016-11-29 | 1200-011-0845 | 169.0 ppb |
2016-12-06 | 1200-205-1115 | 154.0 ppb |
2016-12-27 | 1200-133-1000 | 151.0 ppb |
2016-12-27 | 1200-205-1130 | 159.0 ppb |
2017-01-24 | 1200-133-1040 | 151.0 ppb |
2017-02-16 | 1200-205-0820 | 79.5 ppb |
2017-02-21 | 1200-011-1140 | 31.7 ppb |
2017-02-21 | 1200-133-1210 | 71.5 ppb |
2017-02-28 | 1200-205-1310 | 78.1 ppb |
2017-03-28 | 1200-205-1205 | 36.3 ppb |
2017-04-19 | 1200-133-0657 | 39.7 ppb |
2017-05-09 | 1200-011-0940 | 36.1 ppb |
2017-05-17 | 1200-133-0941 | 41.3 ppb |
2017-07-12 | 1200-205-1000 | ND |
2017-08-01 | 1200-133-0940 | ND |
2017-08-21 | 1200-011-1010 | ND |
2017-10-09 | 1200-133-1108 | ND |
2017-11-20 | 1200-011-1000 | 27.7 ppb |
2017-11-20 | 1200-133-1040 | 22.0 ppb |
2017-12-07 | 1200-133-0651 | 47.2 ppb |
2018-01-11 | 1200-133-1142 | 70.6 ppb |
2018-01-21 | 1200-133-0926 | 81.3 ppb |
2018-01-24 | 1200-133-0934 | 80.4 ppb |
2018-02-06 | 1200-011-1040 | 28.5 ppb |
2018-02-07 | 1200-133-0930 | 71.8 ppb |
2018-02-19 | 1200-205-0922 | 73.3 ppb |
2018-02-27 | 1200-133-0800 | 82.8 ppb |
2018-02-28 | 1200-133-1112 | 91.0 ppb |
2018-03-01 | 1200-205-0846 | 68.1 ppb |
2018-03-06 | 1200-205-1304 | 58.1 ppb |
2018-03-14 | 1200-205-0801 | 50.6 ppb |
2018-03-20 | 1200-205-1104 | 53.9 ppb |
2018-04-05 | 1200-205-0820 | 75.6 ppb |
2018-04-10 | 1200-133-0908 | 73.0 ppb |
2018-04-17 | 1200-205-1114 | 75.5 ppb |
2018-04-24 | 1200-133-0906 | 77.4 ppb |
2018-05-08 | 1200-133-0736 | 86.3 ppb |
2018-05-09 | 1200-205-1041 | 65.6 ppb |
2018-05-17 | 1200-133-0744 | 77.8 ppb |
2018-05-22 | 1200-205-1006 | 56.2 ppb |
2018-05-23 | 1200-011-0925 | 40.9 ppb |
2018-05-28 | 1200-205-1211 | 56.8 ppb |
2018-05-30 | 1200-133-1026 | 55.9 ppb |
2018-06-06 | 1200-133-0830 | 60.4 ppb |
2018-06-12 | 1200-205-1120 | 57.8 ppb |
2018-06-27 | 1200-133-1135 | 31.5 ppb |
2018-06-28 | 1200-205-0927 | 40.7 ppb |
2018-06-29 | 1200-133-0829 | 31.6 ppb |
2018-06-29 | 1200-211-1144 | 23.9 ppb |
2018-07-03 | 1200-205-0833 | 36.1 ppb |
2018-07-08 | 1200-205-0728 | 41.9 ppb |
2018-07-12 | 1200-205-0851 | 43.9 ppb |
2018-07-17 | 1200-205-1026 | 49.2 ppb |
2018-07-24 | 1200-133-0707 | 64.4 ppb |
2018-07-25 | 1200-133-1213 | 68.8 ppb |
2018-08-01 | 1200-133-1049 | 66.7 ppb |
2018-08-16 | 1200-011-0940 | 22.3 ppb |
2018-08-16 | 1200-133-0747 | 65.9 ppb |
2018-08-19 | 1200-133-0802 | 52.7 ppb |
2018-08-21 | 1200-133-1215 | 54.9 ppb |
2018-09-11 | 1200-133-1212 | 95.9 ppb |
2018-10-02 | 1200-205-0952 | 56.0 ppb |
2018-10-08 | 1200-205-0853 | 74.7 ppb |
2018-10-16 | 1200-133-1155 | 122.0 ppb |
2018-10-30 | 1200-133-0856 | 129.0 ppb |
2018-11-06 | 1200-011-0842 | 89.4 ppb |
2018-11-15 | 1200-133-0917 | 90.0 ppb |
2018-12-12 | 1200-205-0922 | 51.9 ppb |
2018-12-18 | 1200-133-0952 | 43.8 ppb |
2018-12-25 | 1200-133-1004 | 51.3 ppb |
2019-01-23 | 1200-133-0909 | 95.5 ppb |
2019-01-29 | 1200-205-1140 | 103.0 ppb |
2019-02-05 | 1200-205-1155 | 69.0 ppb |
2019-02-11 | 1200-133-1011 | 59.9 ppb |
2019-02-13 | 1200-011-1115 | 25.1 ppb |
2019-02-13 | 1200-133-1033 | 52.5 ppb |
2019-02-18 | 1200-133-1135 | 42.2 ppb |
2019-02-27 | 1200-133-1044 | 33.4 ppb |
2019-03-19 | 1200-205-0930 | 34.5 ppb |
2019-03-21 | 1200-133-1218 | 22.2 ppb |
2019-03-27 | 1200-133-1036 | 25.6 ppb |
2019-03-28 | 1200-133-1218 | ND |
2019-04-02 | 1200-205-0904 | 34.6 ppb |
2019-04-30 | 1200-205-1136 | 37.9 ppb |
2019-05-07 | 1200-205-0939 | 38.0 ppb |
2019-05-08 | 1200-133-0710 | 41.3 ppb |
2019-05-13 | 1200-205-0904 | 23.8 ppb |
2019-05-15 | 1200-205-1021 | 26.5 ppb |
2019-05-21 | 1200-011-1012 | 24.0 ppb |
2019-05-22 | 1200-133-0945 | 22.6 ppb |
2019-05-29 | 1200-133-1110 | 29.8 ppb |
2019-06-11 | 1200-205-1100 | 31.5 ppb |
2019-06-12 | 1200-133-1104 | 20.7 ppb |
2019-06-21 | 1200-205-0806 | 23.3 ppb |
2019-07-09 | 1200-133-0809 | ND |
2019-07-23 | 1200-205-1212 | ND |
2019-07-31 | 1200-205-1146 | ND |
2019-08-02 | 1200-205-0908 | 20.9 ppb |
2019-08-11 | 1200-133-0732 | ND |
2019-08-12 | 1200-011-1028 | ND |
2019-08-13 | 1200-133-0907 | ND |
2019-08-20 | 1200-205-1230 | 24.9 ppb |
2019-08-27 | 1200-205-0935 | 25.9 ppb |
2019-09-10 | 1200-205-1055 | 41.8 ppb |
2019-09-24 | 1200-205-0919 | 50.8 ppb |
2019-09-29 | 1200-133-0822 | 52.2 ppb |
2019-10-14 | 1200-133-0746 | 52.6 ppb |
2019-10-15 | 1200-205-0946 | 47.2 ppb |
2019-11-05 | 1200-205-1220 | 48.7 ppb |
2019-11-07 | 1200-011-0958 | 57.6 ppb |
2019-11-07 | 1200-133-0852 | 44.9 ppb |
2019-11-11 | 1200-133-1108 | 51.7 ppb |
2019-11-26 | 1200-133-0726 | 64.2 ppb |