Bromoform

City of Shafter

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

125

Samples

Samples exceeding legal limit (MCL)

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	9.46 ppb	11	11	1.20 ppb - 48.0 ppb
2015	5.48 ppb	16	16	0.570 ppb - 37.0 ppb
2016	2.13 ppb	38	29	ND - 8.20 ppb
2017	3.00 ppb	13	11	ND - 21.0 ppb
2018	4.05 ppb	21	14	ND - 21.0 ppb
2019	4.85 ppb	26	12	ND - 22.0 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
2014-01-21	5806-900-1105	1.80 ppb
2014-01-21	5806-901-1045	1.20 ppb
2014-01-21	5806-902-1120	3.80 ppb
2014-01-21	5806-903-1035	2.90 ppb
2014-04-30	5806-902-1510	1.40 ppb
2014-06-30	5806-902-1345	48.0 ppb
2014-08-28	5806-902-1336	4.00 ppb
2014-09-12	5806-900-0930	1.60 ppb
2014-09-12	5806-901-0915	1.80 ppb
2014-09-12	5806-903-1045	1.60 ppb
2014-11-25	5806-902-0945	36.0 ppb
2015-01-28	5806-900-1310	3.00 ppb
2015-01-28	5806-901-1115	0.850 ppb
2015-01-28	5806-902-1250	37.0 ppb
2015-01-28	5806-903-1100	0.850 ppb
2015-04-30	5806-900-1420	1.50 ppb
2015-04-30	5806-901-1400	2.10 ppb
2015-04-30	5806-902-1515	2.30 ppb
2015-04-30	5806-903-1435	1.80 ppb
2015-06-30	5806-900-1420	2.30 ppb
2015-06-30	5806-901-1400	0.940 ppb
2015-06-30	5806-902-1440	21.0 ppb
2015-06-30	5806-903-1350	0.570 ppb
2015-09-30	5806-900-1330	3.40 ppb
2015-09-30	5806-901-1400	3.30 ppb
2015-09-30	5806-902-1330	4.50 ppb
2015-09-30	5806-903-1420	2.20 ppb
2016-01-26	5867-900-1420	3.70 ppb
2016-01-26	5867-901-1325	1.60 ppb
2016-01-26	5867-902-1355	3.60 ppb
2016-01-26	5867-903-1205	1.80 ppb
2016-02-23	5867-003-0920	ND
2016-02-23	5867-007-1225	ND
2016-02-23	5867-008-1130	ND
2016-02-23	5867-017-1055	ND
2016-02-23	5867-900-1300	3.00 ppb
2016-02-23	5867-901-1140	1.10 ppb
2016-02-23	5867-902-1245	2.30 ppb
2016-02-23	5867-903-1200	1.20 ppb
2016-03-29	5867-900-1400	2.40 ppb
2016-03-29	5867-901-1210	1.90 ppb
2016-03-29	5867-902-1416	1.70 ppb
2016-03-29	5867-903-1150	2.50 ppb
2016-04-05	5867-021-1355	ND
2016-04-26	5867-900-1543	2.00 ppb
2016-04-26	5867-901-1557	2.30 ppb
2016-04-26	5867-902-1525	3.90 ppb
2016-04-26	5867-903-1610	1.70 ppb
2016-05-31	5867-900-1225	2.00 ppb
2016-05-31	5867-901-1215	ND
2016-05-31	5867-902-1345	3.60 ppb
2016-05-31	5867-903-1145	ND
2016-06-28	5867-900-1215	2.80 ppb
2016-06-28	5867-901-1235	ND
2016-06-28	5867-902-1335	2.50 ppb
2016-06-28	5867-903-1135	0.800 ppb
2016-07-26	5867-900-1455	4.00 ppb
2016-07-26	5867-901-1440	2.20 ppb
2016-07-26	5867-902-1112	5.40 ppb
2016-07-26	5867-903-1405	1.50 ppb
2016-10-25	5867-900-1245	5.00 ppb
2016-10-25	5867-901-1225	2.30 ppb
2016-10-25	5867-902-1345	8.20 ppb
2016-10-25	5867-903-1145	3.90 ppb
2016-11-01	5867-004-1120	ND
2017-01-24	5867-021-1110	ND
2017-04-18	5867-900-1420	2.00 ppb
2017-04-18	5867-901-1410	2.00 ppb
2017-04-18	5867-902-1230	3.00 ppb
2017-04-18	5867-903-1350	1.000 ppb
2017-07-11	5867-900-1345	3.00 ppb
2017-07-11	5867-901-1300	1.000 ppb
2017-07-11	5867-902-1320	1.000 ppb
2017-07-11	5867-903-1230	1.000 ppb
2017-10-20	5867-900-1420	21.0 ppb
2017-10-20	5867-901-1435	2.00 ppb
2017-10-20	5867-902-1450	ND
2017-10-20	5867-903-1505	2.00 ppb
2018-01-10	5867-900-1100	3.00 ppb
2018-01-10	5867-901-1130	1.000 ppb
2018-01-10	5867-902-1235	3.00 ppb
2018-01-10	5867-903-1150	2.00 ppb
2018-03-28	5867-021-1335	ND
2018-04-24	5867-021-1115	ND
2018-04-24	5867-900-1300	16.0 ppb
2018-04-24	5867-901-1235	2.00 ppb
2018-04-24	5867-902-0910	5.00 ppb
2018-04-24	5867-903-1220	1.000 ppb
2018-07-24	5867-021-1015	ND
2018-07-24	5867-900-1130	21.0 ppb
2018-07-24	5867-901-1110	1.000 ppb
2018-07-24	5867-902-1315	7.00 ppb
2018-07-24	5867-903-1200	1.000 ppb
2018-10-23	5867-021-1140	ND
2018-10-23	5867-900-1310	4.00 ppb
2018-10-23	5867-901-1330	ND
2018-10-23	5867-902-1240	18.0 ppb
2018-10-23	5867-903-1345	ND
2018-11-08	5806-023-0810	ND
2019-01-22	5867-900-1240	4.00 ppb
2019-01-22	5867-901-1325	ND
2019-01-22	5867-902-1150	14.0 ppb
2019-01-22	5867-903-1335	ND
2019-01-23	5806-007-0945	ND
2019-01-23	5806-008-1055	ND
2019-01-23	5806-017-1020	ND
2019-01-23	5806-021-1130	ND
2019-01-23	5806-023-0850	ND
2019-02-26	5867-007-1110	ND
2019-02-26	5867-017-1215	ND
2019-04-23	5867-021-1225	ND
2019-04-25	5867-900-1125	1.000 ppb
2019-04-25	5867-901-1110	ND
2019-04-25	5867-902-0945	14.0 ppb
2019-04-25	5867-903-1055	ND
2019-06-25	5867-023-1410	ND
2019-07-24	5867-900-1250	22.0 ppb
2019-07-24	5867-901-1225	1.000 ppb
2019-07-24	5867-902-0825	19.0 ppb
2019-07-24	5867-903-1205	1.000 ppb
2019-09-16	5806-023-0800	ND
2019-09-27	5867-900-1015	12.0 ppb
2019-09-27	5867-901-0950	10.00 ppb
2019-09-27	5867-902-1108	19.0 ppb
2019-09-27	5867-903-0845	9.00 ppb