Know Your Environment. Protect Your Health.

Dibromochloromethane

Regional Water Authority

Dibromochloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Dibromochloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

376

Samples

0

Samples exceeding legal limit (MCL)

307

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20181.06 ppb5849ND - 4.70 ppb
20191.27 ppb5954ND - 3.40 ppb
20201.12 ppb6054ND - 3.30 ppb
20210.903 ppb6047ND - 3.10 ppb
20220.998 ppb6048ND - 3.30 ppb
20230.700 ppb7955ND - 2.80 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane was based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to fetal growth and development.

ppb = parts per billion

All test results

Date Lab ID Result
2018-03-05VOC1 200489156ND
2018-03-05VOC1 200489128ND
2018-03-05VOC1 2004891291.20 ppb
2018-03-05VOC1 2004891500.500 ppb
2018-03-06DBP 200489268ND
2018-03-06DBP 200489275ND
2018-03-06DBP 200489287ND
2018-03-06VOC1 2004892950.600 ppb
2018-03-06VOC1 2004892980.900 ppb
2018-03-06VOC1 200489296ND
2018-03-07DBP 2004895372.20 ppb
2018-03-07DBP 2004895380.500 ppb
2018-03-07DBP 2004895390.500 ppb
2018-03-07DBP 200489540ND
2018-03-07DBP 2004895410.700 ppb
2018-03-08DBP 2004895652.00 ppb
2018-03-09DBP 2004897010.500 ppb
2018-03-09DBP 2004897020.500 ppb
2018-03-09DBP 200489703ND
2018-06-05DBP 2004959840.900 ppb
2018-06-05DBP 2004959890.900 ppb
2018-06-05DBP 2004960020.900 ppb
2018-06-06DBP 2004962350.800 ppb
2018-06-07DBP 2004963750.700 ppb
2018-06-07DBP 2004963760.800 ppb
2018-06-07DBP 2004964173.20 ppb
2018-06-08DBP 2004965071.10 ppb
2018-06-08DBP 2004965080.700 ppb
2018-06-08DBP 2004965091.10 ppb
2018-06-08DBP 2004965101.000 ppb
2018-06-08DBP 2004965111.000 ppb
2018-08-17VOC1 2005027352.00 ppb
2018-09-04DBP 2005037321.20 ppb
2018-09-04DBP 2005037371.10 ppb
2018-09-04DBP 2005038421.000 ppb
2018-09-04DBP 2005039121.000 ppb
2018-09-04DBP 2005039131.000 ppb
2018-09-04DBP 2005039141.30 ppb
2018-09-05DBP 2005039811.000 ppb
2018-09-05DBP 2005040861.000 ppb
2018-09-05DBP 2005040873.90 ppb
2018-09-06DBP 2005041854.70 ppb
2018-09-06DBP 2005042111.40 ppb
2018-09-07DBP 2005044411.30 ppb
2018-11-29VOC1 200514106ND
2018-11-29VOC1 2005141211.80 ppb
2018-12-03DBP 2005143723.20 ppb
2018-12-03DBP 2005144061.20 ppb
2018-12-04DBP 2005144471.10 ppb
2018-12-04DBP 2005144521.10 ppb
2018-12-04DBP 2005146251.20 ppb
2018-12-04DBP 2005146261.30 ppb
2018-12-04DBP 2005146270.900 ppb
2018-12-04DBP 2005146280.700 ppb
2018-12-04DBP 2005146291.50 ppb
2018-12-05DBP 2005149520.900 ppb
2018-12-06DBP 2005150690.900 ppb
2018-12-06DBP 2005150700.800 ppb
2019-03-04DBP 2005232150.700 ppb
2019-03-04DBP 2005232170.800 ppb
2019-03-04VOC1 200523150ND
2019-03-04VOC1 2005231510.900 ppb
2019-03-04VOC1 2005231750.600 ppb
2019-03-04VOC1 2005231761.80 ppb
2019-03-05DBP 2005232620.900 ppb
2019-03-05DBP 2005232690.800 ppb
2019-03-05DBP 2005234560.800 ppb
2019-03-05DBP 2005234570.900 ppb
2019-03-05DBP 2005234580.800 ppb
2019-03-05DBP 2005234591.10 ppb
2019-03-05DBP 2005234632.20 ppb
2019-03-05VOC1 2005232511.000 ppb
2019-03-05VOC1 2005232540.600 ppb
2019-03-05VOC1 200523252ND
2019-03-05VOC1 200523253ND
2019-03-05VOC1 2005232840.900 ppb
2019-03-05VOC1 200523286ND
2019-03-07DBP 2005238840.700 ppb
2019-03-08DBP 2005240000.800 ppb
2019-03-08DBP 2005240020.800 ppb
2019-05-08VOC1 200531298ND
2019-06-03DBP 2005343731.80 ppb
2019-06-03DBP 2005344143.30 ppb
2019-06-04DBP 2005344911.60 ppb
2019-06-04DBP 2005344961.60 ppb
2019-06-04DBP 2005346001.50 ppb
2019-06-04DBP 2005347252.70 ppb
2019-06-04DBP 2005347271.80 ppb
2019-06-04DBP 2005347291.90 ppb
2019-06-05DBP 2005350391.70 ppb
2019-06-05DBP 2005350411.40 ppb
2019-06-06DBP 2005351971.50 ppb
2019-06-07DBP 2005353571.50 ppb
2019-09-03DBP 2005469881.40 ppb
2019-09-03DBP 2005469931.70 ppb
2019-09-04DBP 2005474002.80 ppb
2019-09-04DBP 2005474021.50 ppb
2019-09-04DBP 2005474031.60 ppb
2019-09-04DBP 2005474041.80 ppb
2019-09-04DBP 2005474051.50 ppb
2019-09-05DBP 2005474603.40 ppb
2019-09-05DBP 2005476671.50 ppb
2019-09-06DBP 2005478261.30 ppb
2019-09-06DBP 2005478271.50 ppb
2019-09-06DBP 2005478281.20 ppb
2019-12-02DBP 2005584050.900 ppb
2019-12-02DBP 2005584061.30 ppb
2019-12-02DBP 2005584071.10 ppb
2019-12-03DBP 2005584541.000 ppb
2019-12-03DBP 2005584591.000 ppb
2019-12-03DBP 2005586121.000 ppb
2019-12-04DBP 2005589161.10 ppb
2019-12-04DBP 2005589171.20 ppb
2019-12-04DBP 2005589192.60 ppb
2019-12-05DBP 2005590731.000 ppb
2019-12-05DBP 2005590981.000 ppb
2019-12-06DBP 2005591951.000 ppb
2020-03-02DBP 200567713ND
2020-03-02DBP 2005677140.900 ppb
2020-03-02DBP 2005677150.600 ppb
2020-03-02DBP 2005677180.800 ppb
2020-03-02VOC1 200567664ND
2020-03-02VOC1 2005676651.10 ppb
2020-03-02VOC1 200567639A0.600 ppb
2020-03-02VOC1 2005676401.50 ppb
2020-03-02VOC1 2005676390.600 ppb
2020-03-03DBP 2005677800.900 ppb
2020-03-03DBP 2005677870.700 ppb
2020-03-03DBP 2005679201.80 ppb
2020-03-03DBP 2005679210.600 ppb
2020-03-03VOC1 2005677610.800 ppb
2020-03-03VOC1 2005677640.700 ppb
2020-03-03VOC1 200567762ND
2020-03-03VOC1 200567961ND
2020-03-04DBP 2005681770.900 ppb
2020-03-04DBP 200568178ND
2020-03-05DBP 2005682852.50 ppb
2020-03-05DBP 2005683840.700 ppb
2020-03-05VOC1 200568299ND
2020-03-12DBP 2005691640.700 ppb
2020-06-01DBP 2005772640.900 ppb
2020-06-01DBP 2005772650.800 ppb
2020-06-01DBP 2005772660.800 ppb
2020-06-02DBP 2005773180.900 ppb
2020-06-02DBP 2005773270.700 ppb
2020-06-02DBP 2005773990.800 ppb
2020-06-02DBP 2005774011.80 ppb
2020-06-03DBP 2005777193.30 ppb
2020-06-03DBP 2005777210.800 ppb
2020-06-04DBP 2005779540.800 ppb
2020-06-04DBP 2005779550.800 ppb
2020-06-05DBP 2005780772.40 ppb
2020-09-08DBP 2005891091.000 ppb
2020-09-08DBP 2005891181.000 ppb
2020-09-08DBP 2005892520.800 ppb
2020-09-08DBP 2005892531.30 ppb
2020-09-08DBP 2005892543.20 ppb
2020-09-09DBP 2005895601.000 ppb
2020-09-09DBP 2005895611.30 ppb
2020-09-10DBP 2005897971.20 ppb
2020-09-10DBP 2005897993.10 ppb
2020-09-10DBP 2005898032.00 ppb
2020-09-10DBP 2005898061.10 ppb
2020-09-11DBP 2005898682.70 ppb
2020-12-07DBP 2006001360.900 ppb
2020-12-07DBP 2006001371.20 ppb
2020-12-08DBP 2006003262.40 ppb
2020-12-08DBP 2006004071.20 ppb
2020-12-08DBP 2006004081.20 ppb
2020-12-09DBP 2006005622.10 ppb
2020-12-09DBP 2006006070.800 ppb
2020-12-09DBP 2006006531.10 ppb
2020-12-09DBP 2006006561.50 ppb
2020-12-10DBP 2006008820.900 ppb
2020-12-10DBP 2006008840.800 ppb
2020-12-10DBP 200600884B0.800 ppb
2020-12-11DBP 2006009541.60 ppb
2021-03-08DBP 2006088090.800 ppb
2021-03-08DBP 2006088350.900 ppb
2021-03-08DBP 2006088360.900 ppb
2021-03-08DBP 2006088371.10 ppb
2021-03-08VOC1 200608801ND
2021-03-08VOC1 200608885ND
2021-03-08VOC1 2006088821.000 ppb
2021-03-09DBP 2006089140.800 ppb
2021-03-09DBP 2006090890.600 ppb
2021-03-09DBP 2006090901.20 ppb
2021-03-09DBP 2006090931.50 ppb
2021-03-09VOC1 2006089620.900 ppb
2021-03-09VOC1 200608960ND
2021-03-09VOC1 200608959ND
2021-03-09VOC1 200608951ND
2021-03-09VOC1 2006089240.700 ppb
2021-03-09VOC1 2006089861.000 ppb
2021-03-10DBP 2006092510.500 ppb
2021-03-10DBP 200609252ND
2021-03-10VOC1 200609193ND
2021-03-11DBP 2006094202.30 ppb
2021-03-11DBP 2006095120.500 ppb
2021-03-12DBP 2006095841.20 ppb
2021-06-07DBP 2006196801.50 ppb
2021-06-07DBP 2006196781.10 ppb
2021-06-07DBP 2006196791.20 ppb
2021-06-08DBP 2006198000.800 ppb
2021-06-08DBP 2006198020.900 ppb
2021-06-08DBP 2006199200.800 ppb
2021-06-08DBP 2006199212.60 ppb
2021-06-08DBP 2006199222.30 ppb
2021-06-09DBP 200620173ND
2021-06-10DBP 200620493ND
2021-06-10DBP 200620495ND
2021-06-11DBP 2006205831.50 ppb
2021-09-13300057530 3000575321.000 ppb
2021-09-13300057533 3000575350.800 ppb
2021-09-13300057536 3000575380.700 ppb
2021-09-14300058253 300058257ND
2021-09-14300058258 3000582620.800 ppb
2021-09-14300059322 3000593263.10 ppb
2021-09-14300059327 300059329ND
2021-09-14300059398 3000594002.40 ppb
2021-09-14V300058206 300058876ND
2021-09-15300060630 3000606320.600 ppb
2021-09-16300061467 3000614690.600 ppb
2021-09-16300061470 3000614720.500 ppb
2021-09-17300062097 3000620992.40 ppb
2021-12-13D300117139 3001171410.800 ppb
2021-12-13D300117142 3001171440.800 ppb
2021-12-13D300117145 3001171470.600 ppb
2021-12-13D300117148 3001171501.000 ppb
2021-12-13D300118224 3001182281.80 ppb
2021-12-13D300118229 3001182312.20 ppb
2021-12-14D300117272 3001172760.700 ppb
2021-12-14D300117277 3001172810.700 ppb
2021-12-15D300119211 3001192130.600 ppb
2021-12-16D300120051 3001200530.600 ppb
2021-12-16D300120054 3001200560.700 ppb
2021-12-17D300120678 3001206802.20 ppb
2022-03-07D300153474 3001534760.600 ppb
2022-03-07D300153477 3001534790.700 ppb
2022-03-07D300153480 3001534820.800 ppb
2022-03-07V300153323 300153329ND
2022-03-07V300153337 3001533430.600 ppb
2022-03-07V300153401 300153407ND
2022-03-07V300153384 3001533902.00 ppb
2022-03-08D300153988 3001539920.500 ppb
2022-03-08D300153993 3001539970.700 ppb
2022-03-08D300154252 3001542561.50 ppb
2022-03-08D300154257 300154259ND
2022-03-08D300154260 3001542621.50 ppb
2022-03-08V300153972 300153978ND
2022-03-08V300153964 300153970ND
2022-03-08V300153956 3001539620.500 ppb
2022-03-08V300154039 3001540440.600 ppb
2022-03-08V300154049 300154054ND
2022-03-09D300155008 300155010ND
2022-03-09V300154647 300154653ND
2022-03-09V300154596 300154602ND
2022-03-10D300155239 3001552431.20 ppb
2022-03-10D300155826 300155829ND
2022-03-10D300155831 3001558340.500 ppb
2022-03-11D300156650 3001566521.60 ppb
2022-06-06D300193482 3001934861.000 ppb
2022-06-06D300193487 3001934901.50 ppb
2022-06-06D300193491 3001934941.10 ppb
2022-06-06D300193495 3001934981.90 ppb
2022-06-07D300194485 3001944882.40 ppb
2022-06-07D300194421 3001944250.800 ppb
2022-06-07D300194474 3001944782.90 ppb
2022-06-08D300194960 3001949630.600 ppb
2022-06-08D300196206 3001962090.500 ppb
2022-06-08D300196210 3001962130.600 ppb
2022-06-08D300196214 3001962170.700 ppb
2022-06-10D300196552 3001965552.00 ppb
2022-09-12D300242309 3002423121.20 ppb
2022-09-12D300242313 3002423160.700 ppb
2022-09-13D300242867 3002428711.000 ppb
2022-09-13D300242872 3002428761.000 ppb
2022-09-13D300243354 3002433583.30 ppb
2022-09-13D300243359 3002433622.70 ppb
2022-09-14D300243943 3002439460.900 ppb
2022-09-14D300243947 3002439501.90 ppb
2022-09-14D300243951 3002439540.700 ppb
2022-09-15D300244400 300244403ND
2022-09-15D300244404 300244407ND
2022-09-15D300245400 3002454032.40 ppb
2022-12-05D300280513 3002805161.10 ppb
2022-12-05D300280517 3002805201.10 ppb
2022-12-05D300280521 3002805241.90 ppb
2022-12-06D300281387 3002813912.40 ppb
2022-12-06D300281392 3002813950.600 ppb
2022-12-06D300281396 3002813991.80 ppb
2022-12-07D300282133 3002821371.000 ppb
2022-12-07D300282138 3002821421.000 ppb
2022-12-07D300282730 3002827330.600 ppb
2022-12-08D300283547 3002835500.600 ppb
2022-12-08D300283566 3002835690.600 ppb
2022-12-09D300284348 3002843512.10 ppb
2023-02-06V300305519 300305525ND
2023-02-21V300312034 300312489ND
2023-02-21V300312044 3003124910.600 ppb
2023-02-21V300312000 3003122690.600 ppb
2023-02-21V300312008 3003122710.900 ppb
2023-03-06D300316509 3003165120.700 ppb
2023-03-06D300316513 3003165160.900 ppb
2023-03-06D300316517 3003165201.20 ppb
2023-03-06V300316290 300316296ND
2023-03-06V300316304 3003163100.600 ppb
2023-03-06V300316337 3003163430.500 ppb
2023-03-06V300316298 300316301ND
2023-03-06V300316312 300316315ND
2023-03-06V300316345 300316348ND
2023-03-07D300317097 3003171010.600 ppb
2023-03-07D300317102 3003171060.600 ppb
2023-03-07D300317505 3003175091.40 ppb
2023-03-07D300317510 300317513ND
2023-03-07D300317514 3003175171.10 ppb
2023-03-07V300316907 3003169130.900 ppb
2023-03-07V300316899 300316905ND
2023-03-07V300317611 3003176171.000 ppb
2023-03-07V300317619 300317622ND
2023-03-08D300318389 300318392ND
2023-03-08D300318393 300318396ND
2023-03-08V300318416 300318422ND
2023-03-08V300317948 3003179530.800 ppb
2023-03-08V300317958 300317963ND
2023-03-09D300319243 3003192460.500 ppb
2023-03-09V300319225 3003192310.600 ppb
2023-03-10D300319398 3003194011.80 ppb
2023-06-05D300358943 3003589460.600 ppb
2023-06-05D300358947 3003589500.700 ppb
2023-06-05D300358951 300358954ND
2023-06-05D300358955 3003589581.20 ppb
2023-06-05V300358561 3003585680.600 ppb
2023-06-06D300358988 3003589920.800 ppb
2023-06-06D300358993 3003589970.800 ppb
2023-06-06D300359847 3003598512.30 ppb
2023-06-06D300359852 3003598552.10 ppb
2023-06-06V300359376 3003593830.600 ppb
2023-06-06V300359368 300359375ND
2023-06-06V300359360 300359367ND
2023-06-06V300359352 300359359ND
2023-06-06V300359024 300359031ND
2023-06-06V300359033 3003590401.000 ppb
2023-06-06V300359384 300359391ND
2023-06-06V300359393 3003594001.70 ppb
2023-06-07D300360865 3003608680.600 ppb
2023-06-07V300360413 3003604200.600 ppb
2023-06-07V300360421 300360428ND
2023-06-08D300361983 3003619860.600 ppb
2023-06-08D300361987 3003619900.600 ppb
2023-06-09D300362721 3003627241.10 ppb
2023-06-28D300372809 3003734150.700 ppb
2023-09-11D300412854 3004128570.700 ppb
2023-09-11D300412858 300412861ND
2023-09-12D300413093 3004130970.900 ppb
2023-09-12D300413098 3004131021.000 ppb
2023-09-12D300413568 3004135722.50 ppb
2023-09-12D300413573 3004135760.700 ppb
2023-09-12D300413577 3004135801.60 ppb
2023-09-12D300413581 3004135842.20 ppb
2023-09-13D300414470 300414473ND
2023-09-13D300414474 300414477ND
2023-09-14D300415299 300415302ND
2023-09-15D300416083 3004160862.80 ppb
2023-12-04D300454311 3004543140.700 ppb
2023-12-04D300454315 3004543180.900 ppb
2023-12-04D300454322 3004543251.30 ppb
2023-12-05D300454448 3004544520.800 ppb
2023-12-05D300454453 3004544570.900 ppb
2023-12-05D300454954 3004549581.60 ppb
2023-12-05D300454962 3004549650.500 ppb
2023-12-05D300454972 3004549751.60 ppb
2023-12-06D300455828 3004558310.500 ppb
2023-12-06D300455832 3004558350.500 ppb
2023-12-07D300456845 3004568480.600 ppb
2023-12-08D300457513 3004575161.10 ppb