Bromoform

Pennichuck Water Works

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

143

Samples

Samples exceeding legal limit (MCL)

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	ND	2	0	ND
2015	ND	2	0	ND
2016	0.425 ppb	32	19	ND - 1.000 ppb
2017	0.0324 ppb	34	2	ND - 0.600 ppb
2018	0.0541 ppb	37	4	ND - 0.500 ppb
2019	ND	36	0	ND

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
2014-08-07	1408-00208-001	ND
2014-09-22	1409-01461-001	ND
2015-07-09	1507-00792-001	ND
2015-09-16	1509-01287-001	ND
2016-02-10	1602-00926-001	ND
2016-02-10	1602-00926-002	ND
2016-02-10	1602-00926-003	0.700 ppb
2016-02-10	1602-00926-004	ND
2016-02-10	1602-00926-005	ND
2016-02-10	1602-00926-006	ND
2016-02-10	1602-00926-007	ND
2016-02-10	1602-00926-008	ND
2016-05-09	1605-01004-001	0.500 ppb
2016-05-09	1605-01004-002	0.500 ppb
2016-05-09	1605-01004-003	0.700 ppb
2016-05-09	1605-01004-004	ND
2016-05-09	1605-01004-005	ND
2016-05-09	1605-01004-006	ND
2016-05-09	1605-01004-007	0.500 ppb
2016-05-09	1605-01004-008	ND
2016-07-18	1607-01781-001	ND
2016-08-08	1608-01061-002	0.800 ppb
2016-08-08	1608-01061-003	0.700 ppb
2016-08-08	1608-01061-004	0.800 ppb
2016-08-08	1608-01061-005	0.600 ppb
2016-08-08	1608-01061-006	0.800 ppb
2016-08-08	1608-01093-001	0.700 ppb
2016-09-07	1609-00701-001	ND
2016-11-14	1611-01459-003	0.800 ppb
2016-11-14	1611-01459-006	1.000 ppb
2016-11-15	1611-01459-001	0.700 ppb
2016-11-15	1611-01459-002	0.900 ppb
2016-11-15	1611-01459-004	0.800 ppb
2016-11-15	1611-01459-005	0.800 ppb
2016-11-15	1611-01459-007	0.800 ppb
2016-11-15	1611-01459-008	0.500 ppb
2017-02-14	1702-01019-001	ND
2017-02-14	1702-01019-002	ND
2017-02-14	1702-01019-003	ND
2017-02-14	1702-01019-004	ND
2017-02-14	1702-01019-005	ND
2017-02-14	1702-01019-006	ND
2017-02-14	1702-01019-007	ND
2017-02-14	1702-01019-008	ND
2017-05-08	1705-01297-001	ND
2017-05-08	1705-01297-002	ND
2017-05-10	1705-01614-001	ND
2017-05-10	1705-01614-002	ND
2017-05-10	1705-01614-003	ND
2017-05-10	1705-01614-004	ND
2017-05-10	1705-01614-005	ND
2017-05-10	1705-01614-006	ND
2017-07-20	1707-02341-001	ND
2017-08-07	1708-01268-003	ND
2017-08-07	1708-01268-006	ND
2017-08-08	1708-01268-001	ND
2017-08-08	1708-01268-002	ND
2017-08-08	1708-01268-004	ND
2017-08-08	1708-01268-005	ND
2017-08-08	1708-01268-007	0.600 ppb
2017-08-08	1708-01268-008	ND
2017-09-06	1709-00673-001	ND
2017-11-07	1711-01587-004	ND
2017-11-07	1711-01587-005	ND
2017-11-07	1711-01587-007	ND
2017-11-13	1711-01587-002	0.500 ppb
2017-11-13	1711-01587-008	ND
2017-11-14	1711-01587-001	ND
2017-11-14	1711-01587-003	ND
2017-11-14	1711-01587-006	ND
2018-02-12	1802-00882-001	ND
2018-02-12	1802-00882-002	ND
2018-02-13	1802-01000-001	ND
2018-02-13	1802-01000-002	ND
2018-02-13	1802-01000-003	ND
2018-02-13	1802-01000-004	ND
2018-02-13	1802-01000-005	ND
2018-02-13	1802-01000-006	ND
2018-05-10	1805-01583-001	ND
2018-05-10	1805-01583-002	ND
2018-05-10	1805-01583-003	ND
2018-05-10	1805-01583-004	ND
2018-05-10	1805-01583-005	ND
2018-05-10	1805-01583-006	ND
2018-05-10	1805-01583-007	ND
2018-05-10	1805-01583-008	ND
2018-05-10	1805-01583-009	ND
2018-07-12	1807-01403-001	ND
2018-08-16	1808-02569-001	0.500 ppb
2018-08-16	1808-02569-002	ND
2018-08-16	1808-02569-003	ND
2018-08-16	1808-02569-004	ND
2018-08-16	1808-02569-005	ND
2018-08-16	1808-02569-006	0.500 ppb
2018-08-16	1808-02569-007	0.500 ppb
2018-08-16	1808-02569-008	ND
2018-08-16	1808-02569-009	0.500 ppb
2018-09-17	1809-02211-001	ND
2018-11-13	1811-01364-001	ND
2018-11-13	1811-01364-002	ND
2018-11-13	1811-01364-003	ND
2018-11-13	1811-01364-004	ND
2018-11-14	1811-01695-001	ND
2018-11-14	1811-01695-002	ND
2018-11-16	1811-01967-001	ND
2018-11-16	1811-01971-001	ND
2018-11-16	1811-01975-001	ND
2019-02-05	1902-00586-003	ND
2019-02-05	1902-00586-004	ND
2019-02-05	1902-00586-005	ND
2019-02-05	1902-00586-007	ND
2019-02-05	1902-00586-008	ND
2019-02-06	1902-00586-001	ND
2019-02-06	1902-00586-002	ND
2019-02-06	1902-00586-006	ND
2019-05-13	1905-01858-002	ND
2019-05-13	1905-01858-003	ND
2019-05-13	1905-01858-004	ND
2019-05-13	1905-01858-005	ND
2019-05-13	1905-01858-006	ND
2019-05-13	1905-01858-007	ND
2019-05-13	1905-01858-008	ND
2019-05-13	1905-01858-009	ND
2019-05-14	1905-01858-001	ND
2019-07-17	1907-02592-001	ND
2019-08-05	1908-00669-001	ND
2019-08-05	1908-00669-002	ND
2019-08-07	1908-01130-001	ND
2019-08-07	1908-01133-001	ND
2019-08-09	1908-01705-001	ND
2019-08-09	1908-01705-003	ND
2019-08-09	1908-01705-004	ND
2019-08-09	1908-01705-002	ND
2019-08-27	1908-03725-001	ND
2019-11-12	1911-01240-001	ND
2019-11-12	1911-01240-002	ND
2019-11-14	1911-01648-001	ND
2019-11-14	1911-01648-002	ND
2019-11-14	1911-01662-001	ND
2019-11-14	1911-01666-001	ND
2019-11-15	1911-01907-001	ND
2019-11-15	1911-01907-002	ND
2019-11-15	1911-01907-003	ND