Bromoform

Ramsey Water Department

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

216

Samples

Samples exceeding legal limit (MCL)

116

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	0.800 ppb	40	14	ND - 8.97 ppb
2015	1.43 ppb	26	21	ND - 11.7 ppb
2016	0.895 ppb	38	21	ND - 8.69 ppb
2017	1.02 ppb	41	16	ND - 9.26 ppb
2018	1.52 ppb	35	26	ND - 12.0 ppb
2019	1.03 ppb	36	18	ND - 8.30 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	24919-11	ND
2014-01-07	24919-9	ND
2014-02-12	25456-21	0.650 ppb
2014-02-12	25456-20	0.640 ppb
2014-02-12	25456-19	0.600 ppb
2014-02-12	25456-18	0.580 ppb
2014-03-04	25674-11	ND
2014-04-09	26199-11	ND
2014-04-09	26199-9	ND
2014-05-12	26666-14	2.71 ppb
2014-05-12	26666-13	ND
2014-05-12	26666-12	ND
2014-05-12	26666-11	8.97 ppb
2014-05-12	26666-22	ND
2014-05-12	26666-20	ND
2014-05-12	26666-17	ND
2014-05-19	26781-10	ND
2014-05-19	26781-13	ND
2014-05-19	26781-11	ND
2014-05-19	26781-12	ND
2014-06-18	27338-11	ND
2014-06-18	27338-9	ND
2014-06-25	27435-19	ND
2014-07-17	27886-11	ND
2014-07-17	27886-9	ND
2014-08-11	28209-4	1.19 ppb
2014-08-11	28209-3	0.610 ppb
2014-08-11	28209-2	0.520 ppb
2014-08-11	28209-1	5.25 ppb
2014-09-17	28891-11	ND
2014-09-17	28891-9	0.600 ppb
2014-10-06	29268-11	ND
2014-10-06	29268-9	ND
2014-11-10	29791-12	1.90 ppb
2014-11-10	29791-11	ND
2014-11-10	29791-10	0.550 ppb
2014-11-10	29791-9	7.21 ppb
2014-11-10	29791-8	ND
2014-11-10	29791-6	ND
2014-11-10	29791-3	ND
2015-01-13	30764-9	ND
2015-02-11	31208-4	3.64 ppb
2015-02-11	31208-3	0.860 ppb
2015-02-11	31208-2	0.940 ppb
2015-02-11	31208-1	4.56 ppb
2015-04-13	DWS166-9	0.550 ppb
2015-04-20	DWS247-2	0.810 ppb
2015-04-20	DWS247-4	0.830 ppb
2015-05-11	DWS510-4	2.10 ppb
2015-05-11	DWS510-3	1.07 ppb
2015-05-11	DWS510-2	0.980 ppb
2015-05-11	DWS510-1	11.7 ppb
2015-07-14	DWSC34-11	ND
2015-07-14	DWSC34-9	ND
2015-08-11	DWSC183-4	0.570 ppb
2015-08-11	DWSC183-3	0.580 ppb
2015-08-11	DWSC183-2	0.570 ppb
2015-08-11	DWSC183-1	3.04 ppb
2015-10-08	DWSC573-3	ND
2015-10-08	DWSC573-1	0.940 ppb
2015-11-16	DWSC774-4	0.830 ppb
2015-11-16	DWSC774-3	0.620 ppb
2015-11-16	DWSC774-2	0.640 ppb
2015-11-16	DWSC774-1	0.720 ppb
2015-11-16	DWSC777-3	ND
2015-12-15	DWSC921-9	0.740 ppb
2016-01-06	DWSC986-9	0.590 ppb
2016-02-11	DWSC1128-4	0.670 ppb
2016-02-11	DWSC1128-3	0.660 ppb
2016-02-11	DWSC1128-2	0.670 ppb
2016-02-11	DWSC1128-1	0.690 ppb
2016-02-25	DWSC1176-8	0.880 ppb
2016-03-15	DWSC1282-9	ND
2016-04-12	DWSC1408-16	ND
2016-05-16	DWSC1545-4	1.70 ppb
2016-05-16	DWSC1545-3	0.870 ppb
2016-05-16	DWSC1545-2	0.860 ppb
2016-05-16	DWSC1545-1	5.58 ppb
2016-05-17	DWSC1548-22	ND
2016-05-17	DWSC1548-19	0.890 ppb
2016-06-07	DWSC1635-3	ND
2016-06-07	DWSC1635-1	ND
2016-07-13	DWSC1811-9	ND
2016-07-14	DWSC1824-1	ND
2016-08-15	DWSC1958-4	1.36 ppb
2016-08-15	DWSC1958-3	1.22 ppb
2016-08-15	DWSC1958-2	1.27 ppb
2016-08-15	DWSC1958-1	3.20 ppb
2016-08-23	DWSC2000-10	ND
2016-08-23	DWSC1999-1	ND
2016-09-07	DWSC2050-6	ND
2016-09-07	DWSC2050-8	ND
2016-09-07	DWSC2050-3	ND
2016-10-05	DWSC2196-3	ND
2016-10-05	DWSC2196-1	ND
2016-11-14	DWSC2363-14	ND
2016-11-14	DWSC2363-15	ND
2016-11-14	DWSC2363-12	0.740 ppb
2016-11-15	DWSC2370-12	1.37 ppb
2016-11-15	DWSC2370-11	0.630 ppb
2016-11-15	DWSC2370-10	0.620 ppb
2016-11-15	DWSC2370-9	8.69 ppb
2016-12-05	DWSC2445-11	ND
2016-12-05	DWSC2445-9	0.840 ppb
2017-01-09	DWSC2587-9	ND
2017-02-13	DWSC2694-4	3.02 ppb
2017-02-13	DWSC2694-3	1.18 ppb
2017-02-13	DWSC2694-2	1.06 ppb
2017-02-13	DWSC2694-1	5.72 ppb
2017-02-13	DWSC2693-3	ND
2017-04-03	DWSC2911-17	ND
2017-05-03	DWSC3048-6	ND
2017-05-03	DWSC3048-3	ND
2017-05-10	DWSC3102-4	3.38 ppb
2017-05-10	DWSC3102-3	1.000 ppb
2017-05-10	DWSC3102-2	0.840 ppb
2017-05-10	DWSC3102-1	4.48 ppb
2017-05-24	DWSC3190-2	ND
2017-05-24	DWSC3190-3	ND
2017-05-24	DWSC3190-4	ND
2017-05-24	DWSC3190-5	ND
2017-05-24	DWSC3190-1	ND
2017-06-12	DWSC3284-3	ND
2017-06-12	DWSC3284-1	ND
2017-07-10	DWSC3454-2	ND
2017-07-10	DWSC3454-1	0.550 ppb
2017-08-14	DWSC3676-4	2.04 ppb
2017-08-14	DWSC3676-3	1.21 ppb
2017-08-14	DWSC3676-2	1.03 ppb
2017-08-14	DWSC3676-1	9.26 ppb
2017-08-14	DWSC3675-4	ND
2017-08-14	DWSC3675-6	ND
2017-08-14	DWSC3675-2	ND
2017-09-05	DWSC3824-2	ND
2017-09-05	DWSC3824-1	ND
2017-10-03	DWSC4026-3	ND
2017-10-03	DWSC4026-1	ND
2017-11-06	DWSC4205-7	ND
2017-11-06	DWSC4205-5	ND
2017-11-06	DWSC4205-2	0.880 ppb
2017-11-13	DWSC4257-4	0.560 ppb
2017-11-13	DWSC4257-3	ND
2017-11-13	DWSC4257-2	ND
2017-11-13	DWSC4257-1	5.69 ppb
2017-12-05	DWSC4370-9	ND
2018-01-22	DWSC4635-9	0.580 ppb
2018-02-06	DWSC4707-1	0.640 ppb
2018-02-12	DWSC4738-4	1.40 ppb
2018-02-12	DWSC4738-3	1.07 ppb
2018-02-12	DWSC4738-2	1.01 ppb
2018-02-12	DWSC4738-1	3.69 ppb
2018-03-06	DWSC4871-1	0.640 ppb
2018-04-09	DWSC5063-9	0.570 ppb
2018-05-14	DWSC5300-4	2.31 ppb
2018-05-14	DWSC5300-3	1.38 ppb
2018-05-14	DWSC5300-2	0.780 ppb
2018-05-14	DWSC5300-1	12.0 ppb
2018-05-21	DWSC5356-8	ND
2018-05-21	DWSC5356-6	ND
2018-05-21	DWSC5356-3	0.550 ppb
2018-06-04	DWSC5419-2	ND
2018-06-04	DWSC5419-1	ND
2018-07-09	18070948-02	ND
2018-07-09	18070948-01	0.660 ppb
2018-08-13	18081407-04	1.24 ppb
2018-08-13	18081407-03	1.31 ppb
2018-08-13	18081407-02	0.930 ppb
2018-08-13	18081407-01	5.75 ppb
2018-08-13	18081408-08	ND
2018-08-13	18081408-06	ND
2018-08-13	18081408-03	ND
2018-09-04	18090406-03	ND
2018-09-04	18090406-01	0.710 ppb
2018-10-02	18100309-09	1.10 ppb
2018-11-13	18111406-04	0.940 ppb
2018-11-13	18111406-03	0.750 ppb
2018-11-13	18111406-02	0.780 ppb
2018-11-13	18111406-01	11.3 ppb
2018-11-13	18111405-03	0.590 ppb
2018-12-03	18120405-09	0.570 ppb
2019-01-08	19010901-01	0.710 ppb
2019-02-11	19021404-04	0.680 ppb
2019-02-11	19021404-03	ND
2019-02-11	19021404-02	ND
2019-02-11	19021404-01	5.63 ppb
2019-02-13	19021402-01	0.560 ppb
2019-03-05	19030605-01	ND
2019-04-02	19040212-01	0.620 ppb
2019-05-13	3033895004	1.10 ppb
2019-05-13	3033895003	ND
2019-05-13	3033895002	ND
2019-05-13	3033895001	8.30 ppb
2019-05-14	19051501-02	1.000 ppb
2019-06-18	19061804-003	ND
2019-06-18	19061804-007	ND
2019-07-09	19071204-002	ND
2019-07-09	19071204-001	0.520 ppb
2019-08-06	19080701-008	ND
2019-08-06	19080701-006	ND
2019-08-06	19080701-003	ND
2019-08-12	19081215-004	0.760 ppb
2019-08-12	19081215-003	0.530 ppb
2019-08-12	19081215-002	0.540 ppb
2019-08-12	19081215-001	5.54 ppb
2019-09-10	19091343-002	ND
2019-09-10	19091343-001	0.660 ppb
2019-10-08	19101001-002	ND
2019-10-08	19101001-001	ND
2019-10-22	19102302-003	ND
2019-10-22	19102302-001	ND
2019-11-05	19110604-001	0.810 ppb
2019-11-12	19111216-004	ND
2019-11-12	19111216-003	0.510 ppb
2019-11-12	19111216-002	0.620 ppb
2019-11-12	19111216-001	8.11 ppb
2019-12-05	19120608-001	ND