Bromoform

Soquel Creek Water District

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.

MORE ABOUT THIS CONTAMINANT

163

Samples

Samples exceeding legal limit (MCL)

122

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2013	N/A	0	0	N/A
2014	8.87 ppb	31	18	ND - 27.0 ppb
2015	12.7 ppb	20	15	ND - 31.0 ppb
2016	11.0 ppb	18	16	ND - 25.0 ppb
2017	5.00 ppb	30	15	ND - 18.0 ppb
2018	8.60 ppb	22	20	ND - 24.0 ppb
2019	7.44 ppb	42	38	ND - 21.0 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
2014-01-22	1644-801-1240	17.0 ppb
2014-01-22	1644-802-1207	14.0 ppb
2014-01-22	1644-803-1420	2.60 ppb
2014-01-22	1644-804-1345	11.0 ppb
2014-02-25	5806-801-1456	17.0 ppb
2014-02-25	5806-804-1529	12.0 ppb
2014-04-24	9590-801-1030	27.0 ppb
2014-04-24	9590-802-1105	25.0 ppb
2014-04-24	9590-803-1305	4.50 ppb
2014-04-24	9590-804-1335	17.0 ppb
2014-07-22	9590-801-1427	23.0 ppb
2014-07-22	9590-802-1400	21.0 ppb
2014-07-22	9590-803-1338	5.00 ppb
2014-07-22	9590-804-1300	13.0 ppb
2014-09-22	1644-003-1040	ND
2014-09-22	1644-004-0950	ND
2014-09-22	1644-005-1015	ND
2014-09-22	1644-036-1340	ND
2014-09-23	1644-002-1455	ND
2014-09-23	1644-007-1305	ND
2014-09-23	1644-022-1335	ND
2014-09-23	1644-034-1440	ND
2014-09-23	1644-049-0935	ND
2014-09-24	1644-037-1145	ND
2014-09-24	1644-047-1335	ND
2014-09-25	1644-012-1050	ND
2014-10-06	1644-022-1455	ND
2014-10-20	9590-801-0950	23.0 ppb
2014-10-20	9590-802-1025	26.0 ppb
2014-10-20	9590-803-1115	4.80 ppb
2014-10-20	9590-804-1315	12.0 ppb
2015-01-21	9590-801-1055	20.0 ppb
2015-01-21	9590-802-1125	19.0 ppb
2015-01-21	9590-803-1155	2.70 ppb
2015-01-21	9590-804-1225	12.0 ppb
2015-02-12	5806-054-0911	ND
2015-04-07	5806-014-1505	ND
2015-04-23	9590-801-1057	26.0 ppb
2015-04-23	9590-802-1132	19.0 ppb
2015-04-23	9590-803-1227	1.90 ppb
2015-04-23	9590-804-1255	15.0 ppb
2015-07-21	9590-801-1437	31.0 ppb
2015-07-21	9590-802-1458	23.0 ppb
2015-07-21	9590-803-1014	ND
2015-07-21	9590-804-1520	12.0 ppb
2015-08-07	5806-054-1422	ND
2015-10-22	9590-801-1530	27.0 ppb
2015-10-22	9590-802-1511	27.0 ppb
2015-10-22	9590-803-1422	2.10 ppb
2015-10-22	9590-804-1452	16.0 ppb
2015-11-24	5806-054-1358	ND
2016-01-21	9590-801-0922	14.0 ppb
2016-01-21	9590-802-1003	12.0 ppb
2016-01-21	9590-803-1404	1.50 ppb
2016-01-21	9590-804-1250	8.90 ppb
2016-02-11	5806-054-1147	ND
2016-04-21	9590-801-0939	17.0 ppb
2016-04-21	9590-802-1337	12.0 ppb
2016-04-21	9590-803-1023	1.40 ppb
2016-04-21	9590-804-1432	9.80 ppb
2016-05-17	5806-054-0935	ND
2016-07-18	9590-801-1323	20.0 ppb
2016-07-18	9590-802-1352	25.0 ppb
2016-07-18	9590-803-1458	2.00 ppb
2016-07-18	9590-804-1432	14.0 ppb
2016-10-19	9590-801-1058	17.0 ppb
2016-10-19	9590-802-1122	24.0 ppb
2016-10-19	9590-803-1144	3.50 ppb
2016-10-19	9590-804-1400	15.0 ppb
2017-01-17	9590-801-1144	2.80 ppb
2017-01-17	9590-802-1043	15.0 ppb
2017-01-17	9590-803-0939	1.50 ppb
2017-01-17	9590-804-1011	9.30 ppb
2017-04-19	9590-801-1203	10.00 ppb
2017-04-19	9590-802-1322	16.0 ppb
2017-04-19	9590-803-1428	ND
2017-04-19	9590-804-1355	11.0 ppb
2017-07-19	9590-801-1640	15.0 ppb
2017-07-19	9590-802-1609	12.0 ppb
2017-07-19	9590-803-1504	2.40 ppb
2017-07-19	9590-804-1541	10.00 ppb
2017-08-22	9590-004-1050	ND
2017-09-13	9590-005-1234	ND
2017-09-13	9590-036-1407	ND
2017-09-19	9590-049-1109	ND
2017-10-03	9590-054-1340	ND
2017-10-04	9590-037-1155	ND
2017-10-04	9590-054-1155	ND
2017-10-05	9590-034-1207	ND
2017-10-05	9590-047-1102	ND
2017-10-10	9590-022-1311	ND
2017-10-12	9590-012-0733	ND
2017-10-12	9590-014-1335	ND
2017-10-19	9590-801-1009	18.0 ppb
2017-10-19	9590-802-1104	14.0 ppb
2017-10-19	9590-803-1157	3.00 ppb
2017-10-19	9590-804-1303	10.00 ppb
2017-10-24	9590-007-1033	ND
2017-10-24	9590-013-1106	ND
2018-01-18	9590-801-1040	14.0 ppb
2018-01-18	9590-802-1058	9.50 ppb
2018-01-18	9590-803-1125	1.000 ppb
2018-01-18	9590-804-1153	7.10 ppb
2018-04-17	9590-801-1122	21.0 ppb
2018-04-17	9590-802-1153	15.0 ppb
2018-04-17	9590-803-1217	3.20 ppb
2018-04-17	9590-804-1244	12.0 ppb
2018-07-17	9590-801-1022	23.0 ppb
2018-07-17	9590-802-0944	13.0 ppb
2018-07-17	9590-803-0822	3.40 ppb
2018-07-17	9590-804-0858	10.00 ppb
2018-10-18	9590-801-0933	24.0 ppb
2018-10-18	9590-802-1012	8.40 ppb
2018-10-18	9590-803-1049	2.70 ppb
2018-10-18	9590-804-1153	11.0 ppb
2018-10-24	5867-805-1150	2.00 ppb
2018-11-06	5867-805-1242	3.00 ppb
2018-11-09	9590-055-1430	ND
2018-11-19	5867-805-1110	2.00 ppb
2018-12-04	5867-805-1251	4.00 ppb
2018-12-18	5867-805-1140	ND
2019-01-08	9590-054-1206	ND
2019-01-15	5867-805-1243	8.00 ppb
2019-01-16	9590-054-1132	ND
2019-01-23	9590-801-1254	20.0 ppb
2019-01-23	9590-802-1228	14.0 ppb
2019-01-23	9590-803-1122	3.10 ppb
2019-01-23	9590-804-1153	10.00 ppb
2019-01-23	9590-805-1314	3.10 ppb
2019-01-29	5867-805-1125	2.00 ppb
2019-02-12	5867-805-1158	4.00 ppb
2019-02-26	5867-805-1219	2.00 ppb
2019-03-13	5867-805-1300	ND
2019-03-26	5867-805-1136	1.000 ppb
2019-04-09	5867-805-1307	1.000 ppb
2019-04-17	9590-801-1050	21.0 ppb
2019-04-17	9590-802-1120	10.00 ppb
2019-04-17	9590-803-1300	3.50 ppb
2019-04-17	9590-804-1215	13.0 ppb
2019-04-17	9590-805-1340	1.50 ppb
2019-04-23	5867-805-1142	1.000 ppb
2019-05-07	5867-805-1109	3.00 ppb
2019-05-21	5867-805-1029	4.00 ppb
2019-06-05	5867-805-1242	4.00 ppb
2019-07-02	5867-805-1211	2.00 ppb
2019-07-15	9590-801-1026	19.0 ppb
2019-07-15	9590-802-0946	11.0 ppb
2019-07-15	9590-803-1300	2.80 ppb
2019-07-15	9590-804-1417	8.50 ppb
2019-07-15	9590-805-0840	2.30 ppb
2019-07-16	5867-805-1212	3.00 ppb
2019-07-31	5867-805-1121	3.00 ppb
2019-10-08	5867-801-1335	21.0 ppb
2019-10-22	9590-801-0850	15.0 ppb
2019-10-22	9590-802-0915	15.0 ppb
2019-10-22	9590-803-0945	3.40 ppb
2019-10-22	9590-804-1035	9.10 ppb
2019-10-22	9590-805-1115	4.00 ppb
2019-11-05	5867-801-1209	19.0 ppb
2019-11-19	5867-801-1149	16.0 ppb
2019-12-03	5867-801-1155	14.0 ppb
2019-12-17	5867-801-1220	15.0 ppb
2019-12-30	5810-059-1137	ND