Know Your Environment. Protect Your Health.

Bromodichloromethane

Regional Water Authority

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane 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)

340

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20187.74 ppb5855ND - 16.0 ppb
20197.45 ppb5954ND - 18.0 ppb
20206.41 ppb6056ND - 14.4 ppb
20215.44 ppb6055ND - 13.5 ppb
20226.21 ppb6055ND - 13.5 ppb
20234.18 ppb7965ND - 15.6 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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 2004891282.30 ppb
2018-03-05VOC1 2004891296.20 ppb
2018-03-05VOC1 2004891502.80 ppb
2018-03-06DBP 2004892686.20 ppb
2018-03-06DBP 2004892756.00 ppb
2018-03-06DBP 2004892876.80 ppb
2018-03-06VOC1 2004892950.600 ppb
2018-03-06VOC1 2004892980.600 ppb
2018-03-06VOC1 200489296ND
2018-03-07DBP 20048953713.8 ppb
2018-03-07DBP 2004895386.70 ppb
2018-03-07DBP 2004895398.20 ppb
2018-03-07DBP 2004895407.10 ppb
2018-03-07DBP 2004895416.60 ppb
2018-03-08DBP 20048956510.7 ppb
2018-03-09DBP 2004897017.70 ppb
2018-03-09DBP 2004897027.90 ppb
2018-03-09DBP 2004897035.30 ppb
2018-06-05DBP 2004959847.50 ppb
2018-06-05DBP 2004959897.70 ppb
2018-06-05DBP 2004960028.50 ppb
2018-06-06DBP 2004962358.00 ppb
2018-06-07DBP 2004963756.20 ppb
2018-06-07DBP 2004963767.40 ppb
2018-06-07DBP 20049641713.4 ppb
2018-06-08DBP 2004965078.90 ppb
2018-06-08DBP 2004965086.60 ppb
2018-06-08DBP 2004965098.50 ppb
2018-06-08DBP 2004965108.70 ppb
2018-06-08DBP 2004965117.70 ppb
2018-08-17VOC1 2005027353.60 ppb
2018-09-04DBP 2005037329.00 ppb
2018-09-04DBP 2005037379.30 ppb
2018-09-04DBP 2005038429.40 ppb
2018-09-04DBP 20050391210.1 ppb
2018-09-04DBP 2005039139.80 ppb
2018-09-04DBP 20050391410.00 ppb
2018-09-05DBP 2005039819.90 ppb
2018-09-05DBP 2005040868.80 ppb
2018-09-05DBP 20050408714.0 ppb
2018-09-06DBP 20050418516.0 ppb
2018-09-06DBP 20050421110.00 ppb
2018-09-07DBP 2005044419.40 ppb
2018-11-29VOC1 200514106ND
2018-11-29VOC1 2005141211.50 ppb
2018-12-03DBP 20051437212.2 ppb
2018-12-03DBP 2005144069.10 ppb
2018-12-04DBP 2005144478.50 ppb
2018-12-04DBP 2005144529.40 ppb
2018-12-04DBP 20051462511.3 ppb
2018-12-04DBP 20051462612.0 ppb
2018-12-04DBP 2005146278.90 ppb
2018-12-04DBP 2005146287.90 ppb
2018-12-04DBP 20051462910.4 ppb
2018-12-05DBP 2005149528.60 ppb
2018-12-06DBP 2005150697.60 ppb
2018-12-06DBP 2005150707.90 ppb
2019-03-04DBP 2005232155.50 ppb
2019-03-04DBP 2005232176.40 ppb
2019-03-04VOC1 2005231502.00 ppb
2019-03-04VOC1 2005231513.70 ppb
2019-03-04VOC1 2005231752.90 ppb
2019-03-04VOC1 2005231762.10 ppb
2019-03-05DBP 2005232625.90 ppb
2019-03-05DBP 2005232696.40 ppb
2019-03-05DBP 2005234566.20 ppb
2019-03-05DBP 2005234577.80 ppb
2019-03-05DBP 2005234586.70 ppb
2019-03-05DBP 2005234596.60 ppb
2019-03-05DBP 2005234639.20 ppb
2019-03-05VOC1 2005232510.700 ppb
2019-03-05VOC1 200523254ND
2019-03-05VOC1 200523252ND
2019-03-05VOC1 200523253ND
2019-03-05VOC1 2005232840.900 ppb
2019-03-05VOC1 200523286ND
2019-03-07DBP 2005238845.60 ppb
2019-03-08DBP 2005240005.40 ppb
2019-03-08DBP 2005240026.20 ppb
2019-05-08VOC1 200531298ND
2019-06-03DBP 2005343738.80 ppb
2019-06-03DBP 20053441414.1 ppb
2019-06-04DBP 2005344918.60 ppb
2019-06-04DBP 2005344968.80 ppb
2019-06-04DBP 2005346007.90 ppb
2019-06-04DBP 20053472513.0 ppb
2019-06-04DBP 2005347279.70 ppb
2019-06-04DBP 20053472910.5 ppb
2019-06-05DBP 20053503910.3 ppb
2019-06-05DBP 2005350418.50 ppb
2019-06-06DBP 2005351978.50 ppb
2019-06-07DBP 2005353579.50 ppb
2019-09-03DBP 20054698810.00 ppb
2019-09-03DBP 20054699311.6 ppb
2019-09-04DBP 20054740012.2 ppb
2019-09-04DBP 20054740210.9 ppb
2019-09-04DBP 20054740311.3 ppb
2019-09-04DBP 20054740411.1 ppb
2019-09-04DBP 2005474059.20 ppb
2019-09-05DBP 20054746018.0 ppb
2019-09-05DBP 20054766713.4 ppb
2019-09-06DBP 20054782611.0 ppb
2019-09-06DBP 20054782712.5 ppb
2019-09-06DBP 20054782810.8 ppb
2019-12-02DBP 2005584056.90 ppb
2019-12-02DBP 2005584067.80 ppb
2019-12-02DBP 2005584078.00 ppb
2019-12-03DBP 2005584546.90 ppb
2019-12-03DBP 2005584596.90 ppb
2019-12-03DBP 2005586127.30 ppb
2019-12-04DBP 2005589167.00 ppb
2019-12-04DBP 2005589177.90 ppb
2019-12-04DBP 2005589199.40 ppb
2019-12-05DBP 2005590738.00 ppb
2019-12-05DBP 2005590986.50 ppb
2019-12-06DBP 2005591956.60 ppb
2020-03-02DBP 2005677136.10 ppb
2020-03-02DBP 2005677148.40 ppb
2020-03-02DBP 2005677157.20 ppb
2020-03-02DBP 2005677186.60 ppb
2020-03-02VOC1 2005676642.50 ppb
2020-03-02VOC1 2005676654.80 ppb
2020-03-02VOC1 200567639A2.90 ppb
2020-03-02VOC1 2005676401.40 ppb
2020-03-02VOC1 2005676392.90 ppb
2020-03-03DBP 2005677806.20 ppb
2020-03-03DBP 2005677876.70 ppb
2020-03-03DBP 2005679209.70 ppb
2020-03-03DBP 2005679215.40 ppb
2020-03-03VOC1 2005677610.600 ppb
2020-03-03VOC1 200567764ND
2020-03-03VOC1 200567762ND
2020-03-03VOC1 200567961ND
2020-03-04DBP 2005681776.70 ppb
2020-03-04DBP 2005681785.30 ppb
2020-03-05DBP 2005682852.30 ppb
2020-03-05DBP 2005683845.00 ppb
2020-03-05VOC1 200568299ND
2020-03-12DBP 2005691645.60 ppb
2020-06-01DBP 2005772646.40 ppb
2020-06-01DBP 2005772657.20 ppb
2020-06-01DBP 2005772666.80 ppb
2020-06-02DBP 2005773185.90 ppb
2020-06-02DBP 2005773275.30 ppb
2020-06-02DBP 2005773996.50 ppb
2020-06-02DBP 2005774018.90 ppb
2020-06-03DBP 20057771910.2 ppb
2020-06-03DBP 2005777216.80 ppb
2020-06-04DBP 2005779546.10 ppb
2020-06-04DBP 2005779556.20 ppb
2020-06-05DBP 2005780778.40 ppb
2020-09-08DBP 20058910911.1 ppb
2020-09-08DBP 2005891189.00 ppb
2020-09-08DBP 20058925210.5 ppb
2020-09-08DBP 2005892539.60 ppb
2020-09-08DBP 20058925414.4 ppb
2020-09-09DBP 2005895608.10 ppb
2020-09-09DBP 2005895619.20 ppb
2020-09-10DBP 2005897978.80 ppb
2020-09-10DBP 20058979910.6 ppb
2020-09-10DBP 20058980311.0 ppb
2020-09-10DBP 2005898068.30 ppb
2020-09-11DBP 20058986811.1 ppb
2020-12-07DBP 2006001366.20 ppb
2020-12-07DBP 2006001376.20 ppb
2020-12-08DBP 2006003269.50 ppb
2020-12-08DBP 2006004076.30 ppb
2020-12-08DBP 2006004086.40 ppb
2020-12-09DBP 2006005627.80 ppb
2020-12-09DBP 2006006074.20 ppb
2020-12-09DBP 2006006536.20 ppb
2020-12-09DBP 2006006567.10 ppb
2020-12-10DBP 2006008825.70 ppb
2020-12-10DBP 2006008844.60 ppb
2020-12-10DBP 200600884B4.60 ppb
2020-12-11DBP 2006009547.10 ppb
2021-03-08DBP 2006088094.60 ppb
2021-03-08DBP 2006088354.40 ppb
2021-03-08DBP 2006088364.60 ppb
2021-03-08DBP 2006088374.40 ppb
2021-03-08VOC1 2006088011.60 ppb
2021-03-08VOC1 2006088852.60 ppb
2021-03-08VOC1 2006088821.000 ppb
2021-03-09DBP 2006089144.00 ppb
2021-03-09DBP 2006090894.30 ppb
2021-03-09DBP 2006090904.90 ppb
2021-03-09DBP 2006090935.90 ppb
2021-03-09VOC1 2006089620.700 ppb
2021-03-09VOC1 200608960ND
2021-03-09VOC1 200608959ND
2021-03-09VOC1 200608951ND
2021-03-09VOC1 2006089242.80 ppb
2021-03-09VOC1 2006089861.000 ppb
2021-03-10DBP 2006092513.60 ppb
2021-03-10DBP 2006092523.40 ppb
2021-03-10VOC1 200609193ND
2021-03-11DBP 2006094202.10 ppb
2021-03-11DBP 2006095123.80 ppb
2021-03-12DBP 2006095845.60 ppb
2021-06-07DBP 2006196807.00 ppb
2021-06-07DBP 2006196787.20 ppb
2021-06-07DBP 2006196797.30 ppb
2021-06-08DBP 2006198006.70 ppb
2021-06-08DBP 2006198026.80 ppb
2021-06-08DBP 2006199206.90 ppb
2021-06-08DBP 2006199218.30 ppb
2021-06-08DBP 2006199228.10 ppb
2021-06-09DBP 2006201735.30 ppb
2021-06-10DBP 2006204935.00 ppb
2021-06-10DBP 2006204954.70 ppb
2021-06-11DBP 2006205836.50 ppb
2021-09-13300057530 3000575328.40 ppb
2021-09-13300057533 3000575358.70 ppb
2021-09-13300057536 3000575388.90 ppb
2021-09-14300058253 3000582577.90 ppb
2021-09-14300058258 3000582629.50 ppb
2021-09-14300059322 30005932613.5 ppb
2021-09-14300059327 3000593296.80 ppb
2021-09-14300059398 30005940010.1 ppb
2021-09-14V300058206 300058876ND
2021-09-15300060630 3000606327.90 ppb
2021-09-16300061467 3000614696.40 ppb
2021-09-16300061470 3000614725.90 ppb
2021-09-17300062097 3000620999.80 ppb
2021-12-13D300117139 3001171416.00 ppb
2021-12-13D300117142 3001171446.10 ppb
2021-12-13D300117145 3001171475.60 ppb
2021-12-13D300117148 3001171506.80 ppb
2021-12-13D300118224 3001182286.60 ppb
2021-12-13D300118229 3001182319.10 ppb
2021-12-14D300117272 3001172765.80 ppb
2021-12-14D300117277 3001172816.20 ppb
2021-12-15D300119211 3001192134.60 ppb
2021-12-16D300120051 3001200535.70 ppb
2021-12-16D300120054 3001200565.40 ppb
2021-12-17D300120678 3001206809.30 ppb
2022-03-07D300153474 3001534766.10 ppb
2022-03-07D300153477 3001534796.60 ppb
2022-03-07D300153480 3001534826.60 ppb
2022-03-07V300153323 3001533291.60 ppb
2022-03-07V300153337 3001533433.10 ppb
2022-03-07V300153401 3001534073.20 ppb
2022-03-07V300153384 3001533903.20 ppb
2022-03-08D300153988 3001539925.40 ppb
2022-03-08D300153993 3001539976.00 ppb
2022-03-08D300154252 3001542568.10 ppb
2022-03-08D300154257 3001542594.80 ppb
2022-03-08D300154260 3001542627.80 ppb
2022-03-08V300153972 300153978ND
2022-03-08V300153964 300153970ND
2022-03-08V300153956 3001539620.900 ppb
2022-03-08V300154039 3001540440.800 ppb
2022-03-08V300154049 300154054ND
2022-03-09D300155008 3001550104.70 ppb
2022-03-09V300154647 300154653ND
2022-03-09V300154596 300154602ND
2022-03-10D300155239 3001552431.30 ppb
2022-03-10D300155826 3001558295.40 ppb
2022-03-10D300155831 3001558345.90 ppb
2022-03-11D300156650 3001566528.20 ppb
2022-06-06D300193482 3001934867.20 ppb
2022-06-06D300193487 3001934908.70 ppb
2022-06-06D300193491 3001934948.70 ppb
2022-06-06D300193495 3001934988.80 ppb
2022-06-07D300194485 3001944889.60 ppb
2022-06-07D300194421 3001944257.30 ppb
2022-06-07D300194474 30019447813.4 ppb
2022-06-08D300194960 3001949636.40 ppb
2022-06-08D300196206 3001962096.30 ppb
2022-06-08D300196210 3001962137.80 ppb
2022-06-08D300196214 3001962178.30 ppb
2022-06-10D300196552 30019655510.6 ppb
2022-09-12D300242309 3002423129.10 ppb
2022-09-12D300242313 3002423167.00 ppb
2022-09-13D300242867 3002428718.10 ppb
2022-09-13D300242872 3002428767.80 ppb
2022-09-13D300243354 30024335813.5 ppb
2022-09-13D300243359 30024336211.0 ppb
2022-09-14D300243943 3002439468.10 ppb
2022-09-14D300243947 30024395010.2 ppb
2022-09-14D300243951 3002439547.20 ppb
2022-09-15D300244400 3002444035.00 ppb
2022-09-15D300244404 3002444074.80 ppb
2022-09-15D300245400 3002454039.70 ppb
2022-12-05D300280513 3002805165.40 ppb
2022-12-05D300280517 3002805207.90 ppb
2022-12-05D300280521 3002805248.10 ppb
2022-12-06D300281387 30028139110.1 ppb
2022-12-06D300281392 3002813956.70 ppb
2022-12-06D300281396 3002813997.50 ppb
2022-12-07D300282133 3002821375.30 ppb
2022-12-07D300282138 3002821425.80 ppb
2022-12-07D300282730 3002827335.70 ppb
2022-12-08D300283547 3002835504.40 ppb
2022-12-08D300283566 3002835694.70 ppb
2022-12-09D300284348 3002843516.60 ppb
2023-02-06V300305519 300305525ND
2023-02-21V300312034 3003124891.60 ppb
2023-02-21V300312044 3003124913.00 ppb
2023-02-21V300312000 3003122693.50 ppb
2023-02-21V300312008 3003122710.900 ppb
2023-03-06D300316509 3003165124.80 ppb
2023-03-06D300316513 3003165165.50 ppb
2023-03-06D300316517 3003165204.80 ppb
2023-03-06V300316290 3003162961.50 ppb
2023-03-06V300316304 3003163102.70 ppb
2023-03-06V300316337 3003163432.60 ppb
2023-03-06V300316298 300316301ND
2023-03-06V300316312 300316315ND
2023-03-06V300316345 300316348ND
2023-03-07D300317097 3003171013.70 ppb
2023-03-07D300317102 3003171063.80 ppb
2023-03-07D300317505 3003175095.80 ppb
2023-03-07D300317510 3003175133.70 ppb
2023-03-07D300317514 3003175174.70 ppb
2023-03-07V300316907 3003169130.700 ppb
2023-03-07V300316899 3003169050.700 ppb
2023-03-07V300317611 3003176171.10 ppb
2023-03-07V300317619 300317622ND
2023-03-08D300318389 3003183923.70 ppb
2023-03-08D300318393 3003183964.00 ppb
2023-03-08V300318416 300318422ND
2023-03-08V300317948 3003179530.900 ppb
2023-03-08V300317958 300317963ND
2023-03-09D300319243 3003192464.90 ppb
2023-03-09V300319225 300319231ND
2023-03-10D300319398 3003194018.60 ppb
2023-06-05D300358943 3003589464.20 ppb
2023-06-05D300358947 3003589505.20 ppb
2023-06-05D300358951 3003589544.10 ppb
2023-06-05D300358955 3003589584.90 ppb
2023-06-05V300358561 300358568ND
2023-06-06D300358988 3003589924.10 ppb
2023-06-06D300358993 3003589975.20 ppb
2023-06-06D300359847 30035985111.7 ppb
2023-06-06D300359852 3003598559.90 ppb
2023-06-06V300359376 300359383ND
2023-06-06V300359368 300359375ND
2023-06-06V300359360 300359367ND
2023-06-06V300359352 300359359ND
2023-06-06V300359024 3003590311.40 ppb
2023-06-06V300359033 3003590407.20 ppb
2023-06-06V300359384 3003593914.00 ppb
2023-06-06V300359393 3003594002.10 ppb
2023-06-07D300360865 3003608684.80 ppb
2023-06-07V300360413 3003604200.800 ppb
2023-06-07V300360421 300360428ND
2023-06-08D300361983 3003619864.10 ppb
2023-06-08D300361987 3003619904.90 ppb
2023-06-09D300362721 3003627246.00 ppb
2023-06-28D300372809 3003734156.20 ppb
2023-09-11D300412854 3004128578.20 ppb
2023-09-11D300412858 3004128615.80 ppb
2023-09-12D300413093 3004130976.80 ppb
2023-09-12D300413098 3004131028.10 ppb
2023-09-12D300413568 30041357215.1 ppb
2023-09-12D300413573 3004135767.10 ppb
2023-09-12D300413577 3004135808.40 ppb
2023-09-12D300413581 30041358412.4 ppb
2023-09-13D300414470 3004144735.30 ppb
2023-09-13D300414474 3004144775.70 ppb
2023-09-14D300415299 3004153025.70 ppb
2023-09-15D300416083 30041608615.6 ppb
2023-12-04D300454311 3004543144.20 ppb
2023-12-04D300454315 3004543185.20 ppb
2023-12-04D300454322 3004543254.90 ppb
2023-12-05D300454448 3004544524.00 ppb
2023-12-05D300454453 3004544574.40 ppb
2023-12-05D300454954 3004549587.80 ppb
2023-12-05D300454962 3004549653.60 ppb
2023-12-05D300454972 3004549757.60 ppb
2023-12-06D300455828 3004558312.60 ppb
2023-12-06D300455832 3004558353.00 ppb
2023-12-07D300456845 3004568484.00 ppb
2023-12-08D300457513 3004575166.40 ppb