Bromoform
California Water Service (CWS) - Selma
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 |
---|---|---|---|---|
2014 | 0.0995 ppb | 20 | 3 | ND - 0.800 ppb |
2015 | 0.253 ppb | 18 | 5 | ND - 1.60 ppb |
2016 | 0.247 ppb | 22 | 6 | ND - 1.40 ppb |
2017 | 0.187 ppb | 20 | 4 | ND - 1.10 ppb |
2018 | 0.301 ppb | 18 | 6 | ND - 1.50 ppb |
2019 | 0.138 ppb | 23 | 3 | ND - 1.15 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 |
---|---|---|
2014-01-07 | 5701-901-1336 | ND |
2014-01-07 | 5701-902-1432 | ND |
2014-01-07 | 5701-903-1420 | ND |
2014-01-07 | 5701-904-1445 | 0.520 ppb |
2014-02-19 | 5701-038-1330 | ND |
2014-04-08 | 5701-901-1200 | ND |
2014-04-08 | 5701-902-1430 | ND |
2014-04-08 | 5701-903-1440 | ND |
2014-04-08 | 5701-904-1419 | ND |
2014-04-16 | 5701-005-0908 | ND |
2014-04-16 | 5701-013-0926 | ND |
2014-07-08 | 5701-901-1425 | ND |
2014-07-08 | 5701-902-1325 | 0.800 ppb |
2014-07-08 | 5701-903-1340 | ND |
2014-07-08 | 5701-904-1310 | ND |
2014-10-07 | 5701-901-1438 | ND |
2014-10-07 | 5701-902-1415 | ND |
2014-10-07 | 5701-903-1403 | ND |
2014-10-07 | 5701-904-1520 | 0.670 ppb |
2014-10-21 | 5701-014-1053 | ND |
2015-01-06 | 5701-901-1509 | ND |
2015-01-06 | 5701-902-1546 | 0.880 ppb |
2015-01-06 | 5701-903-1534 | ND |
2015-01-06 | 5701-904-1556 | ND |
2015-01-27 | 5701-021-0959 | ND |
2015-04-08 | 5701-901-0809 | ND |
2015-04-08 | 5701-902-0809 | 0.540 ppb |
2015-04-08 | 5701-903-0809 | 0.930 ppb |
2015-04-08 | 5701-904-0809 | ND |
2015-07-07 | 5701-901-0948 | ND |
2015-07-07 | 5701-902-0948 | ND |
2015-07-07 | 5701-903-0948 | ND |
2015-07-07 | 5701-904-0948 | 0.610 ppb |
2015-10-06 | 5810-901-1505 | ND |
2015-10-06 | 5810-902-1401 | ND |
2015-10-06 | 5810-903-1420 | ND |
2015-10-06 | 5810-904-1345 | 1.60 ppb |
2015-10-20 | 9590-004-1110 | ND |
2016-01-07 | 5810-901-1128 | ND |
2016-01-07 | 5810-902-1203 | ND |
2016-01-07 | 5810-903-1153 | ND |
2016-01-07 | 5810-904-1214 | 1.40 ppb |
2016-04-05 | 5701-901-0836 | ND |
2016-04-05 | 5701-902-0836 | 0.920 ppb |
2016-04-05 | 5701-903-0836 | 1.19 ppb |
2016-04-05 | 5701-904-0836 | 0.710 ppb |
2016-04-19 | 5701-018-1020 | ND |
2016-04-19 | 5701-023-0956 | ND |
2016-07-06 | 5701-901-0817 | ND |
2016-07-06 | 5701-902-0817 | ND |
2016-07-06 | 5701-903-0817 | ND |
2016-07-06 | 5701-904-0817 | 0.530 ppb |
2016-07-26 | 5701-001-0914 | ND |
2016-07-26 | 5701-022-0941 | ND |
2016-09-27 | 5701-036-1010 | ND |
2016-10-04 | 5701-901-0841 | ND |
2016-10-04 | 5701-902-0841 | ND |
2016-10-04 | 5701-903-0841 | ND |
2016-10-04 | 5701-904-0841 | ND |
2016-11-09 | 5701-010-1030 | 0.690 ppb |
2017-01-03 | 5701-901-0957 | ND |
2017-01-03 | 5701-902-0957 | ND |
2017-01-03 | 5701-903-0957 | ND |
2017-01-03 | 5701-904-0957 | ND |
2017-03-07 | 5810-038-1041 | ND |
2017-04-04 | 5701-901-0944 | ND |
2017-04-04 | 5701-902-0944 | 1.04 ppb |
2017-04-04 | 5701-903-0944 | 0.740 ppb |
2017-04-04 | 5701-904-0944 | 0.860 ppb |
2017-04-11 | 5701-005-1030 | ND |
2017-04-11 | 5701-013-1046 | ND |
2017-07-06 | 5810-901-1127 | ND |
2017-07-06 | 5810-902-1441 | ND |
2017-07-06 | 5810-903-1424 | ND |
2017-07-06 | 5810-904-1501 | ND |
2017-10-03 | 5810-901-1036 | ND |
2017-10-03 | 5810-902-1322 | ND |
2017-10-03 | 5810-903-1246 | ND |
2017-10-03 | 5810-904-1357 | 1.10 ppb |
2017-10-24 | 5701-014-1122 | ND |
2018-01-04 | 5810-901-0957 | ND |
2018-01-04 | 5810-902-1123 | ND |
2018-01-04 | 5810-903-1046 | ND |
2018-01-04 | 5810-904-1210 | 1.50 ppb |
2018-01-23 | 5701-021-0908 | ND |
2018-04-03 | 5701-901-0821 | ND |
2018-04-03 | 5701-902-0821 | 0.500 ppb |
2018-04-03 | 5701-903-0821 | 0.500 ppb |
2018-04-03 | 5701-904-0821 | 1.27 ppb |
2018-07-05 | 5810-901-1250 | ND |
2018-07-05 | 5810-902-1350 | ND |
2018-07-05 | 5810-903-1325 | ND |
2018-07-05 | 5810-904-1432 | 1.10 ppb |
2018-10-09 | 5701-901-0914 | ND |
2018-10-09 | 5701-902-0914 | ND |
2018-10-09 | 5701-903-0914 | ND |
2018-10-09 | 5701-904-0914 | 0.550 ppb |
2018-10-16 | 5810-004-0947 | ND |
2019-01-03 | 5701-901-0959 | ND |
2019-01-03 | 5701-902-0959 | ND |
2019-01-03 | 5701-903-0959 | ND |
2019-01-03 | 5701-904-0959 | ND |
2019-04-02 | 5701-902-0909 | ND |
2019-04-02 | 5701-903-0909 | ND |
2019-04-02 | 5701-904-0909 | 0.990 ppb |
2019-04-09 | 5810-901-1355 | ND |
2019-04-23 | 5701-018-1100 | ND |
2019-04-23 | 5701-023-1046 | ND |
2019-07-05 | 5701-901-1015 | ND |
2019-07-05 | 5701-902-1104 | ND |
2019-07-05 | 5701-903-1056 | ND |
2019-07-05 | 5701-904-1113 | 1.04 ppb |
2019-07-17 | 5701-022-0943 | ND |
2019-10-01 | 5701-901-1308 | ND |
2019-10-01 | 5701-902-1031 | ND |
2019-10-01 | 5701-903-1229 | ND |
2019-10-01 | 5701-904-1414 | 1.15 ppb |
2019-10-08 | 5701-018-1105 | ND |
2019-10-08 | 5701-023-1048 | ND |
2019-10-17 | 5701-010-1051 | ND |
2019-10-21 | 5701-036-1030 | ND |