Bromochloroacetic acid
San Lorenzo Valley Water District
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.
111
Samples
0
Samples exceeding legal limit (MCL)
72
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2014 | 0.688 ppb | 16 | 6 | ND - 2.40 ppb |
| 2015 | 1.78 ppb | 16 | 11 | ND - 4.00 ppb |
| 2016 | 1.99 ppb | 18 | 14 | ND - 3.60 ppb |
| 2017 | 1.59 ppb | 20 | 12 | ND - 3.30 ppb |
| 2018 | 1.42 ppb | 21 | 13 | ND - 3.60 ppb |
| 2019 | 2.12 ppb | 20 | 16 | ND - 3.50 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 |
|---|---|---|
| 2014-02-12 | 9590-801-0900 | 1.50 ppb |
| 2014-02-12 | 9590-802-0915 | 1.90 ppb |
| 2014-02-12 | 9590-803-1445 | ND |
| 2014-02-12 | 9590-804-0945 | 1.70 ppb |
| 2014-05-20 | 9590-801-0950 | ND |
| 2014-05-20 | 9590-802-1015 | 2.40 ppb |
| 2014-05-20 | 9590-803-1110 | ND |
| 2014-05-20 | 9590-804-1035 | ND |
| 2014-08-13 | 9590-801-1000 | ND |
| 2014-08-13 | 9590-802-1020 | ND |
| 2014-08-13 | 9590-803-1400 | ND |
| 2014-08-13 | 9590-804-0900 | ND |
| 2014-11-12 | 9590-801-1200 | ND |
| 2014-11-12 | 9590-802-1230 | 1.80 ppb |
| 2014-11-12 | 9590-803-1430 | ND |
| 2014-11-12 | 9590-804-1245 | 1.70 ppb |
| 2015-02-11 | 9590-801-1520 | 4.00 ppb |
| 2015-02-11 | 9590-802-1455 | 3.80 ppb |
| 2015-02-11 | 9590-803-1430 | 3.80 ppb |
| 2015-02-11 | 9590-804-1420 | 1.50 ppb |
| 2015-05-20 | 9590-801-1550 | 2.40 ppb |
| 2015-05-20 | 9590-802-1530 | 2.80 ppb |
| 2015-05-20 | 9590-803-1450 | ND |
| 2015-05-20 | 9590-804-1500 | 2.50 ppb |
| 2015-08-12 | 9590-801-1345 | ND |
| 2015-08-12 | 9590-802-1315 | 1.60 ppb |
| 2015-08-12 | 9590-803-1100 | ND |
| 2015-08-12 | 9590-804-1200 | 2.10 ppb |
| 2015-11-17 | 9590-801-1100 | ND |
| 2015-11-17 | 9590-802-1130 | 1.80 ppb |
| 2015-11-17 | 9590-803-1430 | ND |
| 2015-11-17 | 9590-804-1200 | 2.20 ppb |
| 2016-02-10 | 9590-801-1500 | 3.20 ppb |
| 2016-02-10 | 9590-802-1440 | 3.20 ppb |
| 2016-02-10 | 9590-803-1400 | 2.90 ppb |
| 2016-02-10 | 9590-804-1530 | 3.60 ppb |
| 2016-05-11 | 9590-801-1300 | 1.60 ppb |
| 2016-05-11 | 9590-802-1230 | 2.30 ppb |
| 2016-05-11 | 9590-803-1130 | 1.80 ppb |
| 2016-05-11 | 9590-804-1200 | ND |
| 2016-08-11 | 9590-801-1050 | ND |
| 2016-08-11 | 9590-802-1030 | 1.40 ppb |
| 2016-08-11 | 9590-803-1150 | ND |
| 2016-08-11 | 9590-804-1125 | 2.00 ppb |
| 2016-08-25 | 9590-805-1220 | ND |
| 2016-11-03 | 9590-805-1150 | 1.20 ppb |
| 2016-11-05 | 9590-801-1130 | 3.50 ppb |
| 2016-11-05 | 9590-802-1100 | 3.30 ppb |
| 2016-11-05 | 9590-803-1245 | 3.00 ppb |
| 2016-11-05 | 9590-804-1130 | 2.80 ppb |
| 2017-02-15 | 9590-801-0945 | 3.30 ppb |
| 2017-02-15 | 9590-802-1100 | 2.00 ppb |
| 2017-02-15 | 9590-803-1050 | ND |
| 2017-02-15 | 9590-804-1140 | 2.30 ppb |
| 2017-03-08 | 9590-805-1220 | 2.00 ppb |
| 2017-05-11 | 9590-801-1315 | ND |
| 2017-05-11 | 9590-802-1245 | 2.80 ppb |
| 2017-05-11 | 9590-804-1230 | 3.00 ppb |
| 2017-05-11 | 9590-805-1130 | 2.50 ppb |
| 2017-05-31 | 9590-803-1030 | ND |
| 2017-08-17 | 9590-801-0945 | 2.30 ppb |
| 2017-08-17 | 9590-802-1045 | 2.90 ppb |
| 2017-08-17 | 9590-803-1130 | ND |
| 2017-08-17 | 9590-804-1015 | 2.90 ppb |
| 2017-08-17 | 9590-805-1010 | ND |
| 2017-11-07 | 9590-801-1200 | ND |
| 2017-11-07 | 9590-802-1130 | 2.80 ppb |
| 2017-11-07 | 9590-803-1040 | ND |
| 2017-11-07 | 9590-804-1110 | 2.90 ppb |
| 2017-11-07 | 9590-805-0945 | ND |
| 2018-02-15 | 9590-801-0930 | ND |
| 2018-02-15 | 9590-802-1030 | 2.90 ppb |
| 2018-02-15 | 9590-803-1230 | ND |
| 2018-02-15 | 9590-804-1000 | 2.80 ppb |
| 2018-02-15 | 9590-805-0920 | ND |
| 2018-05-17 | 9590-801-1030 | 2.20 ppb |
| 2018-05-17 | 9590-802-1000 | 2.50 ppb |
| 2018-05-17 | 9590-803-0900 | 2.40 ppb |
| 2018-05-17 | 9590-804-0930 | 2.30 ppb |
| 2018-05-17 | 9590-805-1030 | 1.40 ppb |
| 2018-08-15 | 9590-801-0915 | 2.60 ppb |
| 2018-08-15 | 9590-802-0900 | 2.00 ppb |
| 2018-08-15 | 9590-802-1115 | ND |
| 2018-08-15 | 9590-803-1030 | ND |
| 2018-08-15 | 9590-804-0945 | 3.60 ppb |
| 2018-08-15 | 9590-805-1045 | ND |
| 2018-11-15 | 9590-801-1030 | ND |
| 2018-11-15 | 9590-802-1100 | 1.70 ppb |
| 2018-11-15 | 9590-803-1230 | ND |
| 2018-11-15 | 9590-804-1000 | 2.10 ppb |
| 2018-11-15 | 9590-805-1300 | 1.40 ppb |
| 2019-02-21 | 9590-801-0940 | ND |
| 2019-02-21 | 9590-802-0905 | 2.70 ppb |
| 2019-02-21 | 9590-803-0940 | 2.30 ppb |
| 2019-02-21 | 9590-804-0830 | 2.90 ppb |
| 2019-02-21 | 9590-805-0900 | 2.60 ppb |
| 2019-05-15 | 9590-801-1045 | 2.90 ppb |
| 2019-05-15 | 9590-802-1105 | 3.00 ppb |
| 2019-05-15 | 9590-803-1335 | 3.00 ppb |
| 2019-05-15 | 9590-804-1215 | 2.80 ppb |
| 2019-05-15 | 9590-805-1310 | 3.50 ppb |
| 2019-08-14 | 9590-801-1200 | 3.00 ppb |
| 2019-08-14 | 9590-802-1130 | 2.60 ppb |
| 2019-08-14 | 9590-803-1445 | ND |
| 2019-08-14 | 9590-804-1100 | 2.70 ppb |
| 2019-08-14 | 9590-805-1400 | ND |
| 2019-11-19 | 9590-801-1040 | 2.20 ppb |
| 2019-11-19 | 9590-802-1015 | 2.30 ppb |
| 2019-11-19 | 9590-803-0830 | ND |
| 2019-11-19 | 9590-804-0945 | 2.40 ppb |
| 2019-11-19 | 9590-805-0910 | 1.40 ppb |