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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

City of Houston

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

 

609

Samples

0

Samples exceeding legal limit (MCL)

55

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.428 ppb8925ND - 8.40 ppb
20150.0804 ppb1022ND - 6.00 ppb
20160.178 ppb1075ND - 8.70 ppb
20170.510 ppb10711ND - 11.0 ppb
20180.236 ppb1057ND - 10.2 ppb
20190.273 ppb999ND - 8.70 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
2014-03-05AC45667ND
2014-03-05AC456661.000 ppb
2014-03-05AC45649ND
2014-03-05AC45663ND
2014-03-05AC456501.10 ppb
2014-03-05AC45652ND
2014-03-05AC45687ND
2014-03-05AC456881.90 ppb
2014-03-05AC45662ND
2014-03-05AC45665ND
2014-03-05AC45651ND
2014-03-05AC45669ND
2014-03-05AC45648ND
2014-03-06AC459651.000 ppb
2014-03-06AC45943ND
2014-03-06AC45968ND
2014-04-16AC508420.600 ppb
2014-04-16AC50844ND
2014-04-17AC51090ND
2014-04-17AC51078ND
2014-04-17AC51084ND
2014-04-17AC51082ND
2014-05-19AC54558ND
2014-05-19AC545591.000 ppb
2014-05-19AC54574ND
2014-05-19AC545601.000 ppb
2014-05-19AC54566ND
2014-05-19AC54552ND
2014-05-19AC54556ND
2014-05-19AC54563ND
2014-05-19AC54553ND
2014-05-19AC54568ND
2014-05-20AC54716ND
2014-05-20AC54748ND
2014-05-20AC54708ND
2014-05-20AC54719ND
2014-05-20AC54715ND
2014-05-20AC547135.80 ppb
2014-06-03AC558010.900 ppb
2014-07-15AC59698ND
2014-07-15AC596900.600 ppb
2014-07-15AC596920.600 ppb
2014-07-15AC596940.500 ppb
2014-07-15AC59688ND
2014-07-15AC597531.000 ppb
2014-07-15AC59757ND
2014-07-15AC59754ND
2014-07-15AC59755ND
2014-07-15AC59752ND
2014-07-15AC59749ND
2014-07-15AC59770ND
2014-07-15AC59769ND
2014-07-15AC59750ND
2014-07-15AC59751ND
2014-07-15AC597561.000 ppb
2014-07-16AC59835ND
2014-07-16AC598310.500 ppb
2014-07-16AC598390.500 ppb
2014-07-16AC598490.500 ppb
2014-07-16AC598370.600 ppb
2014-07-16AC59845ND
2014-07-16AC59879ND
2014-07-16AC59878ND
2014-07-16AC59892ND
2014-07-16AC59893ND
2014-07-16AC59897ND
2014-10-08AC692092.80 ppb
2014-10-09AC69350ND
2014-10-09AC69348ND
2014-12-09AC741968.40 ppb
2014-12-09AC74204ND
2014-12-18AC754401.000 ppb
2014-12-18AC75453ND
2014-12-18AC75448ND
2014-12-18AC75446ND
2014-12-18AC75451ND
2014-12-18AC754472.70 ppb
2014-12-18AC75459ND
2014-12-18AC75455ND
2014-12-19AC756311.000 ppb
2014-12-19AC75628ND
2014-12-19AC75649ND
2014-12-19AC75637ND
2014-12-19AC75645ND
2014-12-19AC756291.10 ppb
2014-12-19AC75625ND
2014-12-19AC75626ND
2014-12-19AC756381.000 ppb
2014-12-19AC75633ND
2015-03-04AC829522.20 ppb
2015-03-04AC82676ND
2015-03-04AC82679ND
2015-03-04AC82733ND
2015-03-04AC82669ND
2015-03-04AC82675ND
2015-03-04AC82671ND
2015-03-04AC82728ND
2015-03-04AC82667ND
2015-03-04AC82672ND
2015-03-04AC82668ND
2015-03-04AC82664ND
2015-03-04AC82673ND
2015-03-05AC82914ND
2015-03-05AC82712ND
2015-03-05AC82708ND
2015-03-05AC827076.00 ppb
2015-03-05AC82688ND
2015-03-24AC85888ND
2015-06-04AC94641ND
2015-06-04AC94645ND
2015-06-04AC94639ND
2015-06-04AC94643ND
2015-06-04AC94647ND
2015-06-16AC96151ND
2015-06-16AC96154ND
2015-06-16AC96145ND
2015-06-16AC96139ND
2015-06-16AC96142ND
2015-06-16AC96137ND
2015-06-16AC96155ND
2015-06-16AC96150ND
2015-06-16AC96138ND
2015-06-17AC96243ND
2015-06-17AC96260ND
2015-06-17AC96262ND
2015-06-17AC96274ND
2015-06-17AC96273ND
2015-06-17AC96265ND
2015-07-21AD00437ND
2015-07-21AD00441ND
2015-07-21AD00429ND
2015-07-21AD00435ND
2015-07-21AD00443ND
2015-07-21AD00433ND
2015-07-21AD00405ND
2015-07-21AD00407ND
2015-07-22AD00630ND
2015-07-22AD00628ND
2015-07-22AD00632ND
2015-07-22AD00626ND
2015-07-22AD00624ND
2015-07-22AD00638ND
2015-09-16AD07294ND
2015-09-16AD07297ND
2015-09-16AD07293ND
2015-09-16AD07312ND
2015-09-16AD07313ND
2015-09-16AD07304ND
2015-09-16AD07302ND
2015-09-16AD07311ND
2015-09-16AD07292ND
2015-09-16AD07329ND
2015-09-16AD07327ND
2015-09-17AD07597ND
2015-09-17AD07537ND
2015-09-17AD07538ND
2015-09-17AD07563ND
2015-09-17AD07536ND
2015-09-17AD07546ND
2015-09-17AD07599ND
2015-10-22AD11558ND
2015-10-22AD11536ND
2015-10-22AD11542ND
2015-10-22AD11532ND
2015-10-22AD11548ND
2015-10-22AD11550ND
2015-11-12AD13376ND
2015-11-12AD13378ND
2015-11-12AD13382ND
2015-11-12AD13386ND
2015-11-12AD13372ND
2015-11-12AD13380ND
2015-11-12AD13390ND
2015-11-16AD13562ND
2015-11-16AD13618ND
2015-11-16AD13561ND
2015-11-16AD13559ND
2015-11-16AD13619ND
2015-11-16AD13558ND
2015-11-16AD13565ND
2015-11-16AD13556ND
2015-11-16AD13557ND
2015-11-16AD13560ND
2015-11-17AD13768ND
2015-11-17AD13773ND
2015-11-17AD13767ND
2015-11-17AD13772ND
2015-11-17AD13771ND
2015-11-17AD13766ND
2015-12-08AD15973ND
2015-12-08AD15967ND
2016-02-18AD243611.50 ppb
2016-02-18AD24331ND
2016-02-18AD24299ND
2016-02-18AD24379ND
2016-03-03AD26927ND
2016-03-16AD29018ND
2016-03-16AD29033ND
2016-03-16AD29030ND
2016-03-16AD29037ND
2016-03-16AD29019ND
2016-03-16AD29027ND
2016-03-16AD29029ND
2016-03-16AD29036ND
2016-03-16AD29032ND
2016-03-16AD29026ND
2016-03-17AD29319ND
2016-03-17AD29323ND
2016-03-17AD29322ND
2016-03-17AD29318ND
2016-03-17AD29320ND
2016-03-17AD29321ND
2016-03-17AD29381ND
2016-03-17AD29379ND
2016-03-23AD30127ND
2016-03-23AD30131ND
2016-03-23AD30129ND
2016-03-23AD30155ND
2016-06-03AD39456ND
2016-06-08AD39810ND
2016-06-08AD39818ND
2016-06-08AD39806ND
2016-06-08AD39802ND
2016-06-08AD39794ND
2016-06-08AD39808ND
2016-06-15AD40718ND
2016-06-15AD40714ND
2016-06-15AD40722ND
2016-06-15AD40725ND
2016-06-15AD40726ND
2016-06-15AD40716ND
2016-06-15AD40719ND
2016-06-15AD40710ND
2016-06-15AD40730ND
2016-06-15AD40727ND
2016-06-15AD40720ND
2016-06-15AD40717ND
2016-06-16AD41019ND
2016-06-16AD41015ND
2016-06-16AD40972ND
2016-06-16AD40971ND
2016-06-16AD40964ND
2016-06-16AD40968ND
2016-06-16AD41013ND
2016-09-20AD50395ND
2016-09-20AD50391ND
2016-09-20AD50373ND
2016-09-20AD50375ND
2016-09-20AD50381ND
2016-09-20AD50324ND
2016-09-20AD50327ND
2016-09-20AD50330ND
2016-09-20AD50329ND
2016-09-20AD50325ND
2016-09-20AD50328ND
2016-09-20AD50326ND
2016-09-21AD50831ND
2016-09-21AD50829ND
2016-09-21AD50809ND
2016-09-21AD50707ND
2016-09-21AD50686ND
2016-09-21AD50697ND
2016-09-21AD50708ND
2016-09-21AD50712ND
2016-09-21AD507105.20 ppb
2016-09-21AD50696ND
2016-09-21AD50706ND
2016-09-21AD50695ND
2016-09-21AD50825ND
2016-09-22AD50815ND
2016-10-06AD52680ND
2016-10-06AD52682ND
2016-10-06AD52678ND
2016-10-06AD52676ND
2016-10-06AD52674ND
2016-11-17AD58543ND
2016-11-17AD58538ND
2016-11-17AD58539ND
2016-11-17AD58536ND
2016-11-17AD58544ND
2016-11-17AD58545ND
2016-11-18AD58909ND
2016-11-18AD58825ND
2016-11-18AD58817ND
2016-11-18AD58820ND
2016-11-18AD588168.70 ppb
2016-11-18AD58818ND
2016-11-18AD58815ND
2016-11-18AD58819ND
2016-11-18AD58814ND
2016-11-18AD58877ND
2016-11-21AD58875ND
2016-11-21AD58903ND
2016-11-21AD588971.40 ppb
2016-11-21AD58879ND
2016-11-21AD588712.20 ppb
2016-11-21AD58774ND
2016-11-21AD58775ND
2017-01-26AD67193ND
2017-01-26AD67205ND
2017-01-26AD67203ND
2017-02-28AD72422ND
2017-02-28AD72419ND
2017-02-28AD72424ND
2017-02-28AD72399ND
2017-02-28AD72421ND
2017-02-28AD72420ND
2017-02-28AD72398ND
2017-02-28AD72418ND
2017-02-28AD72423ND
2017-02-28AD723971.30 ppb
2017-03-01AD72767ND
2017-03-01AD72739ND
2017-03-01AD72742ND
2017-03-01AD72745ND
2017-03-01AD72737ND
2017-03-01AD727401.30 ppb
2017-03-01AD72738ND
2017-03-02AD73096ND
2017-03-02AD73124ND
2017-03-28AD77142ND
2017-03-28AD77184ND
2017-03-28AD77180ND
2017-03-28AD77186ND
2017-03-28AD771785.30 ppb
2017-03-29AD77428ND
2017-03-29AD77430ND
2017-03-29AD77444ND
2017-03-29AD774241.90 ppb
2017-04-26AD81177ND
2017-04-26AD81142ND
2017-04-26AD81144ND
2017-04-26AD81139ND
2017-04-26AD81140ND
2017-04-26AD81136ND
2017-04-26AD81135ND
2017-04-26AD81143ND
2017-04-26AD81141ND
2017-04-26AD81145ND
2017-04-26AD81146ND
2017-04-26AD81137ND
2017-04-26AD81138ND
2017-04-27AD8152411.0 ppb
2017-04-27AD81528ND
2017-04-27AD81479ND
2017-04-27AD81475ND
2017-04-27AD814783.20 ppb
2017-04-27AD81477ND
2017-07-06AD88484ND
2017-07-06AD88482ND
2017-07-25AD90637ND
2017-07-25AD90641ND
2017-07-25AD90639ND
2017-07-25AD90530ND
2017-07-25AD90522ND
2017-07-25AD90525ND
2017-07-25AD90543ND
2017-07-25AD90545ND
2017-07-25AD90544ND
2017-07-25AD90523ND
2017-07-25AD90532ND
2017-07-25AD90524ND
2017-07-25AD90531ND
2017-07-25AD90521ND
2017-07-26AD90867ND
2017-07-26AD90845ND
2017-07-26AD90799ND
2017-07-26AD90804ND
2017-07-26AD90796ND
2017-07-26AD9079710.4 ppb
2017-07-26AD90802ND
2017-08-15AD93122ND
2017-08-15AD93098ND
2017-08-15AD93120ND
2017-08-15AD93104ND
2017-09-11AD95487ND
2017-09-11AD954932.60 ppb
2017-09-11AD95485ND
2017-09-26AD980557.50 ppb
2017-09-26AD980578.30 ppb
2017-11-07AE03895ND
2017-11-07AE03877ND
2017-11-07AE03875ND
2017-11-07AE03897ND
2017-11-07AE03883ND
2017-11-07AE03881ND
2017-11-14AE04773ND
2017-11-15AE04936ND
2017-11-15AE04933ND
2017-11-15AE04925ND
2017-11-15AE04930ND
2017-11-15AE04931ND
2017-11-15AE04924ND
2017-11-15AE04926ND
2017-11-15AE049271.80 ppb
2017-11-15AE04929ND
2017-11-15AE04935ND
2017-11-15AE04928ND
2017-11-15AE04934ND
2017-11-15AE04932ND
2017-11-16AE05180ND
2017-11-16AE05181ND
2017-11-16AE05182ND
2017-12-04AE06600ND
2017-12-04AE06598ND
2018-01-18AE09269ND
2018-01-18AE09263ND
2018-01-18AE09267ND
2018-01-23AE09888ND
2018-01-23AE09890ND
2018-01-23AE09892ND
2018-01-23AE09882ND
2018-02-07AE12988ND
2018-02-07AE12993ND
2018-02-07AE12992ND
2018-02-07AE12989ND
2018-02-07AE13012ND
2018-02-07AE12952ND
2018-02-07AE12999ND
2018-02-07AE12958ND
2018-02-08AE12996ND
2018-02-08AE12990ND
2018-02-08AE12963ND
2018-02-08AE12991ND
2018-02-08AE1301410.2 ppb
2018-02-08AE12997ND
2018-02-08AE13010ND
2018-02-08AE13011ND
2018-03-29AE20616ND
2018-03-29AE206605.20 ppb
2018-03-29AE20620ND
2018-03-29AE20668ND
2018-03-29AE20614ND
2018-03-29AE20626ND
2018-04-17AE22960ND
2018-04-17AE22998ND
2018-04-17AE22956ND
2018-04-17AE22955ND
2018-04-17AE22996ND
2018-04-17AE22961ND
2018-04-17AE22953ND
2018-04-17AE22994ND
2018-04-17AE22959ND
2018-04-18AE22995ND
2018-04-18AE22958ND
2018-04-18AE22962ND
2018-04-18AE22966ND
2018-04-18AE229651.80 ppb
2018-04-18AE22954ND
2018-04-26AE241742.30 ppb
2018-04-26AE24170ND
2018-04-26AE24160ND
2018-04-26AE24178ND
2018-04-26AE241761.10 ppb
2018-04-26AE24184ND
2018-05-22AE27250ND
2018-05-22AE27262ND
2018-05-22AE27246ND
2018-05-22AE272681.30 ppb
2018-05-22AE27203ND
2018-07-19AE33955ND
2018-07-19AE33951ND
2018-07-19AE33949ND
2018-07-19AE33947ND
2018-07-19AE33953ND
2018-07-19AE33975ND
2018-08-03AE35862ND
2018-08-03AE35866ND
2018-08-15AE37202ND
2018-08-15AE37200ND
2018-08-15AE37218ND
2018-08-15AE37214ND
2018-08-28AE38811ND
2018-08-28AE38800ND
2018-08-28AE38798ND
2018-08-28AE38793ND
2018-08-28AE38807ND
2018-08-28AE38796ND
2018-08-28AE38805ND
2018-08-28AE38803ND
2018-08-28AE38792ND
2018-08-28AE38799ND
2018-08-28AE38797ND
2018-08-28AE38794ND
2018-08-28AE38795ND
2018-08-29AE38802ND
2018-08-29AE38806ND
2018-08-29AE38801ND
2018-08-29AE38804ND
2018-09-26AE41760ND
2018-09-26AE41766ND
2018-09-26AE41768ND
2018-09-26AE41758ND
2018-11-13AE46051ND
2018-11-13AE46052ND
2018-11-13AE46033ND
2018-11-13AE46049ND
2018-11-13AE46044ND
2018-11-13AE46050ND
2018-11-13AE46045ND
2018-11-13AE46055ND
2018-11-13AE46037ND
2018-11-13AE46054ND
2018-11-13AE46038ND
2018-11-13AE46039ND
2018-11-14AE46111ND
2018-11-14AE46042ND
2018-11-14AE46043ND
2018-11-14AE460582.90 ppb
2018-11-14AE46053ND
2019-01-15AE50125ND
2019-01-15AE50069ND
2019-01-15AE50072ND
2019-01-15AE50068ND
2019-01-15AE50067ND
2019-01-15AE50075ND
2019-01-15AE50084ND
2019-01-15AE50070ND
2019-01-15AE500711.10 ppb
2019-01-15AE50093ND
2019-01-16AE50170ND
2019-01-16AE50087ND
2019-01-16AE50074ND
2019-01-16AE50088ND
2019-01-16AE50080ND
2019-01-16AE500734.20 ppb
2019-01-16AE50126ND
2019-03-06AE57367ND
2019-03-06AE57365ND
2019-03-06AE57369ND
2019-03-06AE57359ND
2019-03-06AE57361ND
2019-03-06AE57363ND
2019-04-10AE62068ND
2019-04-10AE62008ND
2019-04-10AE62027ND
2019-04-10AE62002ND
2019-04-10AE62030ND
2019-04-10AE62006ND
2019-04-10AE62007ND
2019-04-10AE62019ND
2019-04-10AE62020ND
2019-04-10AE62029ND
2019-04-10AE61994ND
2019-04-11AE62064ND
2019-04-11AE62066ND
2019-04-11AE619881.000 ppb
2019-04-11AE61985ND
2019-04-11AE61983ND
2019-04-11AE619841.50 ppb
2019-04-11AE619868.70 ppb
2019-04-11AE61987ND
2019-06-25AE72013ND
2019-06-25AE72015ND
2019-06-25AE72011ND
2019-07-24AE76001ND
2019-07-24AE75999ND
2019-07-24AE75989ND
2019-07-24AE75953ND
2019-07-24AE75954ND
2019-07-24AE75952ND
2019-07-24AE75955ND
2019-07-24AE75951ND
2019-07-24AE75949ND
2019-07-24AE75950ND
2019-07-24AE75944ND
2019-07-24AE75945ND
2019-07-24AE75956ND
2019-07-25AE75991ND
2019-07-25AE75993ND
2019-07-25AE75909ND
2019-07-25AE75904ND
2019-07-25AE75910ND
2019-07-25AE75906ND
2019-07-25AE759432.60 ppb
2019-07-25AE75942ND
2019-09-23AE84256ND
2019-09-23AE84250ND
2019-09-23AE84254ND
2019-10-09AE86125ND
2019-10-09AE86124ND
2019-10-09AE86127ND
2019-10-09AE86128ND
2019-10-09AE86126ND
2019-10-09AE86122ND
2019-10-09AE86121ND
2019-10-09AE86129ND
2019-10-09AE86123ND
2019-10-10AE86286ND
2019-10-10AE86282ND
2019-10-10AE86285ND
2019-10-10AE86281ND
2019-10-10AE862832.80 ppb
2019-10-10AE86284ND
2019-10-10AE86287ND
2019-11-18AE89561ND
2019-11-18AE89557ND
2019-11-18AE89559ND
2019-11-22AE90418ND
2019-11-22AE90420ND
2019-11-22AE90414ND
2019-11-22AE90412ND
2019-12-02AE90836ND
2019-12-02AE90844ND
2019-12-02AE908423.70 ppb
2019-12-02AE90838ND
2019-12-02AE90840ND
2019-12-02AE90846ND
2019-12-02AE908341.40 ppb