Bromoform
City of Corona
Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 1.57 ppb | 60 | 23 | ND - 17.0 ppb |
2015 | 2.32 ppb | 55 | 22 | ND - 15.0 ppb |
2016 | 1.95 ppb | 42 | 17 | ND - 13.0 ppb |
2017 | 1.26 ppb | 50 | 28 | ND - 4.50 ppb |
2018 | 1.79 ppb | 50 | 27 | ND - 14.0 ppb |
2019 | 1.43 ppb | 50 | 26 | ND - 12.0 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.5 ppb
The EWG Health Guideline of 0.5 ppb for bromoform 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 | 9590-021-0900 | ND |
2014-02-12 | 9590-027-1020 | ND |
2014-02-12 | 9590-028-1450 | ND |
2014-02-12 | 9590-039-1100 | ND |
2014-02-12 | 9590-052-1145 | ND |
2014-02-12 | 9590-054-1355 | ND |
2014-02-26 | 9590-030-0730 | ND |
2014-03-03 | 9590-019-1345 | ND |
2014-03-03 | 9590-036-1430 | ND |
2014-03-03 | 9590-041-1505 | ND |
2014-03-03 | 9590-801-1315 | 2.60 ppb |
2014-03-03 | 9590-802-1510 | ND |
2014-03-03 | 9590-803-1229 | 1.10 ppb |
2014-03-03 | 9590-804-1026 | 1.40 ppb |
2014-03-03 | 9590-805-1305 | ND |
2014-03-03 | 9590-806-1435 | 2.90 ppb |
2014-03-03 | 9590-807-0855 | 17.0 ppb |
2014-03-03 | 9590-808-1135 | 1.60 ppb |
2014-03-12 | 9590-055-1120 | ND |
2014-05-14 | 9590-024-1325 | ND |
2014-05-14 | 9590-038-1035 | ND |
2014-05-14 | 9590-043-0915 | 1.90 ppb |
2014-05-15 | 9590-019-1155 | 1.20 ppb |
2014-05-15 | 9590-022-0850 | ND |
2014-05-15 | 9590-023-1005 | ND |
2014-05-15 | 9590-034-1500 | ND |
2014-06-02 | 9590-801-1200 | 2.60 ppb |
2014-06-02 | 9590-802-1045 | ND |
2014-06-02 | 9590-803-0825 | 1.90 ppb |
2014-06-02 | 9590-804-0850 | 1.70 ppb |
2014-06-02 | 9590-805-0920 | ND |
2014-06-02 | 9590-806-1230 | 1.70 ppb |
2014-06-02 | 9590-807-0950 | 8.20 ppb |
2014-06-02 | 9590-808-1020 | 1.80 ppb |
2014-08-13 | 9590-015-0930 | ND |
2014-08-13 | 9590-031-1455 | ND |
2014-08-13 | 9590-032-1100 | ND |
2014-08-13 | 9590-033-1315 | ND |
2014-08-21 | 9590-029-0900 | ND |
2014-08-26 | 9590-003-1400 | ND |
2014-08-27 | 9590-014-1315 | ND |
2014-08-27 | 9590-056-1415 | ND |
2014-08-28 | 9590-013-1030 | ND |
2014-09-15 | 9590-801-1300 | 2.60 ppb |
2014-09-15 | 9590-802-1400 | 5.60 ppb |
2014-09-15 | 9590-803-0815 | 1.40 ppb |
2014-09-15 | 9590-804-0910 | 2.10 ppb |
2014-09-15 | 9590-805-0935 | ND |
2014-09-15 | 9590-806-1330 | 4.60 ppb |
2014-09-15 | 9590-807-1010 | 9.80 ppb |
2014-09-15 | 9590-808-1130 | 4.50 ppb |
2014-09-16 | 9590-054-1500 | ND |
2014-12-15 | 9590-801-1420 | 2.70 ppb |
2014-12-15 | 9590-802-1340 | ND |
2014-12-15 | 9590-803-0850 | ND |
2014-12-15 | 9590-804-0920 | ND |
2014-12-15 | 9590-805-0950 | ND |
2014-12-15 | 9590-807-1020 | 13.0 ppb |
2014-12-15 | 9590-808-1135 | ND |
2014-12-15 | 9590-809-1040 | ND |
2015-02-03 | 9590-030-1000 | 10.00 ppb |
2015-02-12 | 9590-027-0900 | ND |
2015-02-12 | 9590-028-1420 | ND |
2015-02-12 | 9590-030-0810 | ND |
2015-02-12 | 9590-039-0950 | ND |
2015-02-12 | 9590-052-1330 | ND |
2015-03-09 | 9590-801-1250 | 2.80 ppb |
2015-03-09 | 9590-802-1230 | 4.20 ppb |
2015-03-09 | 9590-803-0900 | ND |
2015-03-09 | 9590-804-0935 | ND |
2015-03-09 | 9590-805-1015 | ND |
2015-03-09 | 9590-807-1040 | 8.30 ppb |
2015-03-09 | 9590-808-1320 | 3.00 ppb |
2015-03-09 | 9590-809-1110 | 8.40 ppb |
2015-05-28 | 9590-003-0940 | ND |
2015-05-28 | 9590-019-1045 | 1.40 ppb |
2015-05-28 | 9590-024-0930 | ND |
2015-05-28 | 9590-034-0830 | ND |
2015-05-28 | 9590-038-1000 | ND |
2015-05-28 | 9590-043-1100 | 1.50 ppb |
2015-06-08 | 9590-801-1450 | 3.70 ppb |
2015-06-08 | 9590-802-1420 | ND |
2015-06-08 | 9590-803-0900 | 1.40 ppb |
2015-06-08 | 9590-804-0940 | 1.50 ppb |
2015-06-08 | 9590-805-1010 | ND |
2015-06-08 | 9590-807-1040 | 10.00 ppb |
2015-06-08 | 9590-808-1340 | 2.50 ppb |
2015-06-08 | 9590-809-1100 | 11.0 ppb |
2015-06-09 | 9590-062-0815 | ND |
2015-08-12 | 9590-029-0900 | ND |
2015-08-12 | 9590-031-1020 | ND |
2015-08-12 | 9590-032-1100 | ND |
2015-08-12 | 9590-056-0940 | ND |
2015-08-20 | 9590-013-0900 | ND |
2015-08-20 | 9590-014-1430 | ND |
2015-08-20 | 9590-015-1130 | ND |
2015-08-20 | 9590-033-0950 | ND |
2015-09-17 | 9590-801-1120 | 3.00 ppb |
2015-09-17 | 9590-802-1100 | ND |
2015-09-17 | 9590-803-0815 | 1.10 ppb |
2015-09-17 | 9590-804-0840 | ND |
2015-09-17 | 9590-805-0900 | ND |
2015-09-17 | 9590-807-0910 | 8.90 ppb |
2015-09-17 | 9590-808-1040 | 2.10 ppb |
2015-09-17 | 9590-809-1020 | 9.10 ppb |
2015-10-14 | 9590-023-0930 | ND |
2015-10-14 | 9590-054-1330 | ND |
2015-12-23 | 9590-801-1015 | 3.50 ppb |
2015-12-23 | 9590-802-1130 | ND |
2015-12-23 | 9590-803-0910 | ND |
2015-12-23 | 9590-804-0945 | ND |
2015-12-23 | 9590-805-0930 | ND |
2015-12-23 | 9590-807-1510 | 15.0 ppb |
2015-12-23 | 9590-808-1420 | ND |
2015-12-23 | 9590-809-1440 | 15.0 ppb |
2016-03-09 | 9590-801-1025 | 3.30 ppb |
2016-03-09 | 9590-802-1050 | ND |
2016-03-09 | 9590-803-1110 | ND |
2016-03-09 | 9590-804-0840 | ND |
2016-03-09 | 9590-805-0910 | ND |
2016-03-09 | 9590-807-1330 | 13.0 ppb |
2016-03-09 | 9590-808-1440 | 2.30 ppb |
2016-03-09 | 9590-809-1400 | 13.0 ppb |
2016-04-13 | 9590-027-0950 | ND |
2016-04-13 | 9590-028-0800 | ND |
2016-04-13 | 9590-030-0850 | ND |
2016-04-21 | 9590-054-1340 | ND |
2016-04-27 | 9590-062-1320 | ND |
2016-06-09 | 9590-801-1151 | 3.30 ppb |
2016-06-09 | 9590-802-1045 | ND |
2016-06-09 | 9590-803-0827 | 1.80 ppb |
2016-06-09 | 9590-804-0852 | 1.80 ppb |
2016-06-09 | 9590-805-0910 | 1.90 ppb |
2016-06-09 | 9590-807-0936 | 11.0 ppb |
2016-06-09 | 9590-808-1028 | 2.40 ppb |
2016-06-09 | 9590-809-1006 | 12.0 ppb |
2016-07-20 | 9590-039-1045 | ND |
2016-08-18 | 9590-003-1000 | ND |
2016-08-18 | 9590-023-1050 | ND |
2016-08-18 | 9590-038-1400 | ND |
2016-08-23 | 9590-024-1430 | ND |
2016-08-24 | 9590-019-1030 | 2.10 ppb |
2016-08-24 | 9590-034-0900 | ND |
2016-08-24 | 9590-043-1430 | 2.80 ppb |
2016-09-13 | 9590-802-1350 | ND |
2016-09-13 | 9590-808-1450 | 3.30 ppb |
2016-09-13 | 9590-809-1440 | 3.20 ppb |
2016-10-11 | 9590-031-1530 | ND |
2016-10-12 | 9590-032-1430 | ND |
2016-10-20 | 9590-029-1400 | ND |
2016-10-27 | 9590-014-0915 | ND |
2016-10-27 | 9590-015-1020 | ND |
2016-10-27 | 9590-033-1400 | ND |
2016-10-27 | 9590-056-0840 | ND |
2016-12-15 | 9590-802-1350 | ND |
2016-12-15 | 9590-808-1010 | 2.40 ppb |
2016-12-15 | 9590-809-0950 | 2.40 ppb |
2017-03-16 | 9590-801-0900 | 4.50 ppb |
2017-03-16 | 9590-802-0950 | ND |
2017-03-16 | 9590-803-1120 | ND |
2017-03-16 | 9590-804-1030 | ND |
2017-03-16 | 9590-805-1100 | 1.50 ppb |
2017-03-16 | 9590-807-1520 | 1.60 ppb |
2017-03-16 | 9590-808-1420 | 1.40 ppb |
2017-03-16 | 9590-809-1440 | 1.40 ppb |
2017-04-12 | 9590-030-1000 | ND |
2017-04-12 | 9590-054-1400 | ND |
2017-04-12 | 9590-062-1500 | ND |
2017-04-20 | 9590-027-1400 | ND |
2017-04-20 | 9590-038-0920 | ND |
2017-04-20 | 9590-039-1500 | ND |
2017-06-15 | 9590-801-1120 | 3.20 ppb |
2017-06-15 | 9590-802-1540 | ND |
2017-06-15 | 9590-803-0920 | 2.00 ppb |
2017-06-15 | 9590-804-0945 | 2.20 ppb |
2017-06-15 | 9590-805-1010 | 1.90 ppb |
2017-06-15 | 9590-807-1340 | 1.30 ppb |
2017-06-15 | 9590-808-1430 | 2.10 ppb |
2017-06-15 | 9590-809-1400 | 1.30 ppb |
2017-08-09 | 9590-019-1030 | 3.30 ppb |
2017-08-09 | 9590-023-0945 | ND |
2017-08-09 | 9590-024-1400 | ND |
2017-08-09 | 9590-043-1530 | 3.00 ppb |
2017-08-10 | 9590-034-1220 | ND |
2017-09-13 | 9590-801-1100 | 3.20 ppb |
2017-09-13 | 9590-802-1400 | ND |
2017-09-13 | 9590-803-0850 | 1.90 ppb |
2017-09-13 | 9590-804-0910 | 2.30 ppb |
2017-09-13 | 9590-805-0930 | 1.90 ppb |
2017-09-13 | 9590-807-1000 | 1.60 ppb |
2017-09-13 | 9590-808-1440 | 2.00 ppb |
2017-09-13 | 9590-809-1520 | 1.60 ppb |
2017-10-12 | 9590-015-1500 | ND |
2017-10-12 | 9590-031-0930 | ND |
2017-10-12 | 9590-032-1030 | ND |
2017-10-19 | 9590-014-1030 | ND |
2017-10-19 | 9590-029-1500 | ND |
2017-10-19 | 9590-056-1400 | ND |
2017-10-26 | 9590-033-1000 | ND |
2017-12-14 | 9590-801-1350 | 3.70 ppb |
2017-12-14 | 9590-802-1450 | ND |
2017-12-14 | 9590-803-0830 | 1.80 ppb |
2017-12-14 | 9590-804-0855 | 1.30 ppb |
2017-12-14 | 9590-805-0925 | 1.90 ppb |
2017-12-14 | 9590-807-0945 | 3.90 ppb |
2017-12-14 | 9590-808-1020 | 2.60 ppb |
2017-12-14 | 9590-809-1010 | 2.60 ppb |
2018-02-14 | 9590-030-1340 | ND |
2018-02-14 | 9590-032-1445 | ND |
2018-03-22 | 9590-801-1020 | 1.30 ppb |
2018-03-22 | 9590-802-1100 | 1.80 ppb |
2018-03-22 | 9590-803-0850 | 1.20 ppb |
2018-03-22 | 9590-804-0910 | 1.70 ppb |
2018-03-22 | 9590-805-0930 | ND |
2018-03-22 | 9590-808-1010 | 1.80 ppb |
2018-03-22 | 9590-809-0950 | 9.50 ppb |
2018-03-28 | 9590-807-1530 | 9.00 ppb |
2018-04-18 | 9590-039-1600 | ND |
2018-04-26 | 9590-027-1230 | ND |
2018-04-26 | 9590-038-1020 | ND |
2018-06-14 | 9590-801-1405 | 2.70 ppb |
2018-06-14 | 9590-802-1435 | 1.40 ppb |
2018-06-14 | 9590-803-0945 | 1.90 ppb |
2018-06-14 | 9590-804-1010 | 2.00 ppb |
2018-06-14 | 9590-805-1035 | 1.60 ppb |
2018-06-14 | 9590-807-1105 | 5.00 ppb |
2018-06-14 | 9590-808-1210 | 2.20 ppb |
2018-06-14 | 9590-809-1135 | 4.40 ppb |
2018-06-27 | 9590-021-1500 | ND |
2018-08-16 | 9590-024-1100 | ND |
2018-08-16 | 9590-055-1400 | ND |
2018-08-22 | 9590-019-1500 | 2.90 ppb |
2018-08-22 | 9590-034-0900 | ND |
2018-08-22 | 9590-043-1030 | 2.50 ppb |
2018-09-13 | 9590-801-1100 | 2.80 ppb |
2018-09-13 | 9590-802-1040 | ND |
2018-09-13 | 9590-803-0830 | 1.70 ppb |
2018-09-13 | 9590-804-0850 | 1.60 ppb |
2018-09-13 | 9590-805-0910 | 1.80 ppb |
2018-09-13 | 9590-807-0940 | 3.80 ppb |
2018-09-13 | 9590-808-1020 | 2.60 ppb |
2018-09-13 | 9590-809-1000 | 3.20 ppb |
2018-10-10 | 9590-014-1410 | ND |
2018-10-10 | 9590-029-1500 | ND |
2018-10-10 | 9590-031-1100 | ND |
2018-10-25 | 9590-033-1530 | ND |
2018-10-25 | 9590-056-0930 | ND |
2018-11-15 | 9590-071-1500 | ND |
2018-12-11 | 9590-015-1120 | ND |
2018-12-13 | 9590-801-1120 | ND |
2018-12-13 | 9590-802-1210 | 2.60 ppb |
2018-12-13 | 9590-803-0845 | 2.60 ppb |
2018-12-13 | 9590-804-0910 | ND |
2018-12-13 | 9590-805-0945 | ND |
2018-12-13 | 9590-807-1030 | 14.0 ppb |
2018-12-13 | 9590-808-1300 | ND |
2018-12-13 | 9590-809-1350 | ND |
2019-02-13 | 9590-029-1000 | ND |
2019-02-13 | 9590-030-1300 | ND |
2019-02-13 | 9590-031-1430 | ND |
2019-02-13 | 9590-056-0900 | ND |
2019-02-14 | 9590-032-1330 | ND |
2019-03-14 | 9590-801-1110 | 2.60 ppb |
2019-03-14 | 9590-802-1240 | 2.50 ppb |
2019-03-14 | 9590-803-0800 | ND |
2019-03-14 | 9590-804-0830 | ND |
2019-03-14 | 9590-805-0850 | ND |
2019-03-14 | 9590-807-0920 | 12.0 ppb |
2019-03-14 | 9590-808-1030 | ND |
2019-03-14 | 9590-809-0950 | ND |
2019-04-24 | 9590-015-0910 | ND |
2019-04-24 | 9590-021-1330 | ND |
2019-05-22 | 9590-014-1030 | ND |
2019-05-22 | 9590-033-0830 | ND |
2019-05-22 | 9590-039-1530 | ND |
2019-05-22 | 9590-055-1450 | ND |
2019-05-23 | 9590-024-1130 | ND |
2019-05-30 | 9590-027-1400 | ND |
2019-06-17 | 9590-801-0935 | 3.00 ppb |
2019-06-17 | 9590-803-1115 | 1.70 ppb |
2019-06-17 | 9590-804-1130 | 1.80 ppb |
2019-06-17 | 9590-805-1050 | 1.80 ppb |
2019-06-17 | 9590-807-1020 | 5.00 ppb |
2019-06-18 | 9590-802-1440 | 1.10 ppb |
2019-06-18 | 9590-808-1425 | 2.60 ppb |
2019-06-18 | 9590-809-1400 | 2.50 ppb |
2019-09-16 | 9590-801-1340 | 2.50 ppb |
2019-09-16 | 9590-802-1510 | 1.90 ppb |
2019-09-16 | 9590-803-1140 | 1.70 ppb |
2019-09-16 | 9590-804-1215 | 1.70 ppb |
2019-09-16 | 9590-805-1155 | 1.40 ppb |
2019-09-16 | 9590-807-1240 | 3.10 ppb |
2019-09-16 | 9590-808-1317 | 1.90 ppb |
2019-09-16 | 9590-809-1257 | 2.30 ppb |
2019-09-26 | 9590-038-0810 | ND |
2019-10-09 | 9590-019-1030 | 1.90 ppb |
2019-10-09 | 9590-034-0718 | ND |
2019-10-09 | 9590-043-0918 | 2.80 ppb |
2019-10-09 | 9590-072-1150 | ND |
2019-12-12 | 9590-801-0825 | 3.50 ppb |
2019-12-12 | 9590-802-0910 | ND |
2019-12-12 | 9590-803-1020 | ND |
2019-12-12 | 9590-804-1000 | 1.10 ppb |
2019-12-12 | 9590-807-1125 | 5.90 ppb |
2019-12-12 | 9590-808-1505 | 1.30 ppb |
2019-12-12 | 9590-809-1225 | 1.70 ppb |
2019-12-30 | 9590-805-1450 | ND |