Bromochloroacetic acid
Castaic Lake Water Agency
Bromochloroacetic acid is formed when chlorine or other disinfectants are used to treat drinking water. Bromochloroacetic acid and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy.
183
Samples
0
Samples exceeding legal limit (MCL)
172
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 2.43 ppb | 31 | 31 | 1.10 ppb - 5.10 ppb |
| 2015 | 1.23 ppb | 24 | 15 | ND - 3.00 ppb |
| 2016 | 3.28 ppb | 32 | 31 | ND - 5.90 ppb |
| 2017 | 4.51 ppb | 32 | 31 | ND - 6.90 ppb |
| 2018 | 4.08 ppb | 32 | 32 | 1.80 ppb - 6.90 ppb |
| 2019 | 4.65 ppb | 32 | 32 | 2.10 ppb - 6.80 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
EWG Health Guideline 0.02 ppb
The EWG Health Guideline of 0.02 ppb for bromochloroacetic 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 |
|---|---|---|
| 2014-01-13 | 9590-805-1105 | 2.10 ppb |
| 2014-01-13 | 9590-807-1240 | 2.30 ppb |
| 2014-01-14 | 9590-800-0950 | 1.70 ppb |
| 2014-01-14 | 9590-801-1045 | 2.10 ppb |
| 2014-01-14 | 9590-809-1010 | 2.10 ppb |
| 2014-01-15 | 9590-802-1005 | 1.80 ppb |
| 2014-01-15 | 9590-804-0930 | 1.50 ppb |
| 2014-01-15 | 9590-806-1025 | 1.60 ppb |
| 2014-04-14 | 9590-805-1230 | 4.10 ppb |
| 2014-04-14 | 9590-807-1335 | 4.50 ppb |
| 2014-04-15 | 9590-800-1040 | 5.00 ppb |
| 2014-04-15 | 9590-801-1105 | 4.80 ppb |
| 2014-04-16 | 9590-802-1205 | 4.70 ppb |
| 2014-04-16 | 9590-804-1055 | 5.10 ppb |
| 2014-04-16 | 9590-806-1225 | 4.30 ppb |
| 2014-07-14 | 9590-805-1205 | 1.80 ppb |
| 2014-07-14 | 9590-807-1330 | 2.10 ppb |
| 2014-07-15 | 9590-800-1030 | 2.10 ppb |
| 2014-07-15 | 9590-801-1115 | 3.10 ppb |
| 2014-07-15 | 9590-809-1100 | 2.70 ppb |
| 2014-07-16 | 9590-802-1200 | 1.80 ppb |
| 2014-07-16 | 9590-804-1045 | 1.80 ppb |
| 2014-07-16 | 9590-806-1230 | 1.90 ppb |
| 2014-10-14 | 9590-800-1040 | 1.10 ppb |
| 2014-10-14 | 9590-801-1125 | 1.10 ppb |
| 2014-10-14 | 9590-809-1100 | 1.30 ppb |
| 2014-10-15 | 9590-802-1100 | 1.30 ppb |
| 2014-10-15 | 9590-804-1020 | 1.30 ppb |
| 2014-10-15 | 9590-806-1125 | 1.30 ppb |
| 2014-10-16 | 9590-805-1050 | 1.40 ppb |
| 2014-10-16 | 9590-807-1300 | 1.60 ppb |
| 2015-04-13 | 9590-805-1130 | 1.30 ppb |
| 2015-04-13 | 9590-807-1305 | 2.80 ppb |
| 2015-04-14 | 9590-800-1055 | 1.40 ppb |
| 2015-04-14 | 9590-801-1135 | 1.10 ppb |
| 2015-04-14 | 9590-809-1115 | ND |
| 2015-04-15 | 9590-802-1220 | 1.20 ppb |
| 2015-04-15 | 9590-804-1100 | 1.50 ppb |
| 2015-04-15 | 9590-806-1255 | 1.50 ppb |
| 2015-07-15 | 9590-802-0815 | ND |
| 2015-07-15 | 9590-804-0735 | ND |
| 2015-07-15 | 9590-806-0835 | ND |
| 2015-07-16 | 9590-805-1015 | ND |
| 2015-07-16 | 9590-807-1255 | 1.40 ppb |
| 2015-07-17 | 9590-800-0945 | ND |
| 2015-07-17 | 9590-801-1010 | 1.10 ppb |
| 2015-07-17 | 9590-809-0955 | ND |
| 2015-10-13 | 9590-800-1020 | 2.40 ppb |
| 2015-10-13 | 9590-801-1110 | 3.00 ppb |
| 2015-10-13 | 9590-806-1135 | 2.40 ppb |
| 2015-10-13 | 9590-809-1050 | 2.90 ppb |
| 2015-10-14 | 9590-802-1110 | ND |
| 2015-10-14 | 9590-804-1030 | 2.50 ppb |
| 2015-10-15 | 9590-805-1020 | ND |
| 2015-10-15 | 9590-807-1250 | 2.90 ppb |
| 2016-02-08 | 9590-805-1250 | 3.90 ppb |
| 2016-02-08 | 9590-807-1435 | 4.00 ppb |
| 2016-02-09 | 9590-800-1020 | 4.60 ppb |
| 2016-02-09 | 9590-801-1105 | 3.10 ppb |
| 2016-02-09 | 9590-809-1045 | 3.00 ppb |
| 2016-02-10 | 9590-802-1055 | 5.20 ppb |
| 2016-02-10 | 9590-804-1015 | 4.70 ppb |
| 2016-02-10 | 9590-806-1120 | 5.00 ppb |
| 2016-04-11 | 9590-805-1225 | ND |
| 2016-04-11 | 9590-807-1405 | 2.10 ppb |
| 2016-04-12 | 9590-800-1040 | 1.70 ppb |
| 2016-04-12 | 9590-801-1120 | 4.60 ppb |
| 2016-04-12 | 9590-809-1100 | 4.50 ppb |
| 2016-04-13 | 9590-802-0805 | 1.40 ppb |
| 2016-04-13 | 9590-804-0735 | 2.10 ppb |
| 2016-04-13 | 9590-806-0855 | 1.40 ppb |
| 2016-07-11 | 9590-011-0925 | 2.10 ppb |
| 2016-07-11 | 9590-807-1110 | 2.30 ppb |
| 2016-07-12 | 9590-800-0930 | 1.60 ppb |
| 2016-07-12 | 9590-801-1030 | 1.60 ppb |
| 2016-07-12 | 9590-809-0955 | 1.60 ppb |
| 2016-07-13 | 9590-802-1045 | 1.60 ppb |
| 2016-07-13 | 9590-804-1010 | 1.60 ppb |
| 2016-07-13 | 9590-806-1110 | 1.60 ppb |
| 2016-10-10 | 9590-805-1155 | 5.90 ppb |
| 2016-10-10 | 9590-807-1340 | 5.90 ppb |
| 2016-10-11 | 9590-800-1030 | 3.80 ppb |
| 2016-10-11 | 9590-801-1120 | 4.30 ppb |
| 2016-10-11 | 9590-809-1055 | 4.80 ppb |
| 2016-10-12 | 9590-802-1130 | 4.40 ppb |
| 2016-10-12 | 9590-804-1045 | 5.60 ppb |
| 2016-10-12 | 9590-806-1200 | 5.10 ppb |
| 2017-01-10 | 9590-800-1020 | 4.30 ppb |
| 2017-01-10 | 9590-801-1110 | 4.10 ppb |
| 2017-01-10 | 9590-809-1035 | ND |
| 2017-01-11 | 9590-802-1235 | 2.40 ppb |
| 2017-01-11 | 9590-804-1150 | 2.80 ppb |
| 2017-01-11 | 9590-806-1305 | 3.60 ppb |
| 2017-01-12 | 9590-805-1200 | 4.70 ppb |
| 2017-01-12 | 9590-807-1430 | 4.40 ppb |
| 2017-04-10 | 9590-805-1145 | 3.10 ppb |
| 2017-04-10 | 9590-807-1340 | 3.50 ppb |
| 2017-04-11 | 9590-800-1050 | 3.20 ppb |
| 2017-04-11 | 9590-801-1135 | 3.50 ppb |
| 2017-04-11 | 9590-803-1120 | 3.20 ppb |
| 2017-04-12 | 9590-802-1100 | 3.50 ppb |
| 2017-04-12 | 9590-804-1015 | 3.70 ppb |
| 2017-04-12 | 9590-806-1130 | 4.00 ppb |
| 2017-07-10 | 9590-805-1235 | 4.30 ppb |
| 2017-07-10 | 9590-807-1425 | 5.30 ppb |
| 2017-07-11 | 9590-800-1015 | 6.40 ppb |
| 2017-07-11 | 9590-801-1100 | 6.90 ppb |
| 2017-07-11 | 9590-809-1035 | 6.60 ppb |
| 2017-07-12 | 9590-802-0845 | 5.20 ppb |
| 2017-07-12 | 9590-804-0805 | 5.50 ppb |
| 2017-07-12 | 9590-806-0900 | 5.70 ppb |
| 2017-10-10 | 9590-800-1025 | 5.50 ppb |
| 2017-10-10 | 9590-801-1105 | 5.20 ppb |
| 2017-10-10 | 9590-809-1045 | 4.30 ppb |
| 2017-10-11 | 9590-802-1005 | 5.80 ppb |
| 2017-10-11 | 9590-804-0935 | 6.40 ppb |
| 2017-10-11 | 9590-806-1025 | 6.10 ppb |
| 2017-10-12 | 9590-805-1030 | 5.80 ppb |
| 2017-10-12 | 9590-807-1255 | 5.40 ppb |
| 2018-01-09 | 9590-800-1045 | 2.60 ppb |
| 2018-01-09 | 9590-801-1120 | 3.30 ppb |
| 2018-01-09 | 9590-809-1100 | 1.80 ppb |
| 2018-01-10 | 9590-802-1055 | 2.90 ppb |
| 2018-01-10 | 9590-804-1010 | 2.90 ppb |
| 2018-01-10 | 9590-806-1115 | 2.10 ppb |
| 2018-01-11 | 9590-805-1205 | 4.00 ppb |
| 2018-01-11 | 9590-807-1420 | 4.20 ppb |
| 2018-04-09 | 9590-805-1210 | 2.90 ppb |
| 2018-04-09 | 9590-807-1415 | 2.90 ppb |
| 2018-04-10 | 9590-800-1000 | 5.50 ppb |
| 2018-04-10 | 9590-801-1040 | 5.30 ppb |
| 2018-04-10 | 9590-803-1020 | 5.20 ppb |
| 2018-04-11 | 9590-802-1140 | 6.00 ppb |
| 2018-04-11 | 9590-804-1045 | 6.60 ppb |
| 2018-04-11 | 9590-806-1210 | 6.90 ppb |
| 2018-07-09 | 9590-805-1020 | 2.90 ppb |
| 2018-07-09 | 9590-807-1310 | 3.40 ppb |
| 2018-07-10 | 9590-800-1015 | 5.50 ppb |
| 2018-07-10 | 9590-801-1055 | 5.10 ppb |
| 2018-07-10 | 9590-809-1040 | 5.20 ppb |
| 2018-07-11 | 9590-802-1220 | 4.00 ppb |
| 2018-07-11 | 9590-804-1040 | 4.10 ppb |
| 2018-07-11 | 9590-806-1245 | 3.80 ppb |
| 2018-10-08 | 9590-805-1225 | 3.30 ppb |
| 2018-10-08 | 9590-807-1420 | 3.20 ppb |
| 2018-10-09 | 9590-800-1010 | 4.10 ppb |
| 2018-10-09 | 9590-801-1100 | 4.30 ppb |
| 2018-10-09 | 9590-803-1040 | 4.00 ppb |
| 2018-10-10 | 9590-802-1050 | 4.20 ppb |
| 2018-10-10 | 9590-804-1015 | 4.10 ppb |
| 2018-10-10 | 9590-806-1125 | 4.10 ppb |
| 2019-01-14 | 9590-805-1200 | 2.10 ppb |
| 2019-01-14 | 9590-807-1355 | 3.50 ppb |
| 2019-01-15 | 9590-800-1000 | 4.80 ppb |
| 2019-01-15 | 9590-801-1055 | 5.00 ppb |
| 2019-01-15 | 9590-809-1035 | 4.60 ppb |
| 2019-01-16 | 9590-802-1110 | 5.20 ppb |
| 2019-01-16 | 9590-804-1030 | 5.10 ppb |
| 2019-01-16 | 9590-806-1150 | 6.00 ppb |
| 2019-04-08 | 9590-805-1150 | 3.10 ppb |
| 2019-04-08 | 9590-807-1350 | 3.90 ppb |
| 2019-04-09 | 9590-800-1010 | 6.40 ppb |
| 2019-04-09 | 9590-801-1050 | 6.80 ppb |
| 2019-04-09 | 9590-809-1035 | 6.20 ppb |
| 2019-04-10 | 9590-802-1035 | 5.30 ppb |
| 2019-04-10 | 9590-804-0955 | 6.20 ppb |
| 2019-04-10 | 9590-806-1105 | 5.90 ppb |
| 2019-07-08 | 9590-805-1230 | 2.80 ppb |
| 2019-07-08 | 9590-807-1405 | 3.40 ppb |
| 2019-07-09 | 9590-800-1000 | 4.70 ppb |
| 2019-07-09 | 9590-801-1055 | 4.50 ppb |
| 2019-07-09 | 9590-809-1030 | 4.20 ppb |
| 2019-07-10 | 9590-802-1120 | 3.50 ppb |
| 2019-07-10 | 9590-804-1045 | 3.80 ppb |
| 2019-07-10 | 9590-806-1155 | 3.60 ppb |
| 2019-10-14 | 9590-805-1210 | 3.80 ppb |
| 2019-10-14 | 9590-807-1400 | 4.20 ppb |
| 2019-10-15 | 9590-800-1055 | 4.90 ppb |
| 2019-10-15 | 9590-801-1140 | 5.20 ppb |
| 2019-10-15 | 9590-809-1120 | 5.10 ppb |
| 2019-10-16 | 9590-802-1130 | 4.80 ppb |
| 2019-10-16 | 9590-804-1055 | 5.20 ppb |
| 2019-10-16 | 9590-806-1210 | 5.10 ppb |