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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Dover Water Department

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.

MORE ABOUT THIS CONTAMINANT

 

175

Samples

0

Samples exceeding legal limit (MCL)

106

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.00 ppb3418ND - 9.36 ppb
20153.16 ppb3320ND - 10.4 ppb
20164.72 ppb2016ND - 8.90 ppb
20173.39 ppb3119ND - 13.0 ppb
20184.95 ppb2116ND - 15.0 ppb
20192.09 ppb3617ND - 7.74 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2014-01-31S238393ND
2014-03-18L4982245-1 TTHM5.60 ppb
2014-03-18L4982245-2 TTHM2.96 ppb
2014-03-18L4982245-3 TTHM3.73 ppb
2014-03-18L4982245-4 TTHM4.39 ppb
2014-04-16S268406ND
2014-05-19S495007ND
2014-06-12L5106837-1-TTHM8.27 ppb
2014-06-12L5106837-2-TTHM4.76 ppb
2014-06-12L5106837-3-TTHM6.21 ppb
2014-06-12L5106837-4-TTHM9.36 ppb
2014-08-15S262091ND
2014-08-15S262092ND
2014-08-15S262093ND
2014-08-15S262094ND
2014-08-15S262095ND
2014-08-15S262096ND
2014-08-15S262097ND
2014-09-08L5241778-1 TTHM5.03 ppb
2014-09-08L5241778-2 TTHM4.66 ppb
2014-09-08L5241778-3 TTHM8.87 ppb
2014-09-08L5241778-4 TTHM8.45 ppb
2014-09-15S262090ND
2014-09-15S2620980.600 ppb
2014-09-15S262099ND
2014-09-15S262100ND
2014-09-15S262102ND
2014-09-15S262103ND
2014-09-29L5279641-180.540 ppb
2014-11-17S251385ND
2014-12-03L5352430-1 TTHM8.57 ppb
2014-12-03L5352430-2 TTHM4.17 ppb
2014-12-03L5352430-3 TTHM7.30 ppb
2014-12-03L5352430-4 TTHM8.47 ppb
2015-01-15S262115ND
2015-03-02L5484011-1-TTHM6.15 ppb
2015-03-02L5484011-2-TTHM4.09 ppb
2015-03-02L5484011-3-TTHM5.80 ppb
2015-03-02L5484011-4-TTHM6.80 ppb
2015-05-22S574910ND
2015-05-26L5609090-16.78 ppb
2015-05-26L5609090-2-TTHM3.65 ppb
2015-05-26L5609090-3-TTHM4.33 ppb
2015-05-26L5609090-4-TTHM8.80 ppb
2015-08-27L5783279-1 TTHM4.25 ppb
2015-08-27L5783279-2 TTHM3.80 ppb
2015-08-27L5783279-3 TTHM4.13 ppb
2015-08-27L5783279-4 TTHM7.41 ppb
2015-11-18L5919691-1 TTHM7.98 ppb
2015-11-18L5919691-2 TTHM6.25 ppb
2015-11-18L5919691-3 TTHM10.4 ppb
2015-11-18L5919691-4 TTHM10.1 ppb
2015-12-07S238368ND
2015-12-07S2383690.540 ppb
2015-12-11S497411ND
2015-12-11S497412ND
2015-12-11S497413ND
2015-12-11S497414ND
2015-12-14S497427ND
2015-12-14S497430ND
2015-12-14S497431ND
2015-12-14S497432ND
2015-12-14S4974331.25 ppb
2015-12-14S497435ND
2015-12-17S4974280.540 ppb
2015-12-20S2684101.37 ppb
2015-12-27S251387ND
2016-02-11L6073199-1 TTHM5.50 ppb
2016-02-11L6073199-2 TTHM3.20 ppb
2016-02-11L6073199-3 TTHM4.60 ppb
2016-02-11L6073199-4 TTHM5.80 ppb
2016-02-18S497452ND
2016-05-10L6246380-1 TTHM6.90 ppb
2016-05-10L6246380-2 TTHM3.30 ppb
2016-05-10L6246380-3 TTHM8.60 ppb
2016-05-10L6246380-4 TTHM6.80 ppb
2016-06-14S677171ND
2016-08-08L6415584-17.00 ppb
2016-08-08L6415584-24.00 ppb
2016-08-08L6415584-36.30 ppb
2016-08-08L6415584-48.90 ppb
2016-10-04S637219ND
2016-11-02L6541220-1 TTHM8.20 ppb
2016-11-02L6541220-2 TTHM2.70 ppb
2016-11-02L6541220-3 TTHM4.80 ppb
2016-11-02L6541220-4 TTHM7.70 ppb
2016-12-21S637222ND
2017-01-26L6650711-1 TTHM7.30 ppb
2017-01-26L6650711-2 TTHMND
2017-01-26L6650711-3 TTHM3.40 ppb
2017-01-26L6650711-4 TTHM5.00 ppb
2017-04-24L6772990-1 TTHM6.20 ppb
2017-04-24L6772990-2 TTHM3.10 ppb
2017-04-24L6772990-3 TTHM9.80 ppb
2017-04-24L6772990-4 TTHM7.60 ppb
2017-07-24L6921063-1 TTHM6.20 ppb
2017-07-24L6921063-2 TTHM2.20 ppb
2017-07-24L6921063-3 TTHM4.30 ppb
2017-07-24L6921063-4 TTHM6.00 ppb
2017-10-25L6965247-1 TTHM13.0 ppb
2017-10-25L6965247-2 TTHM11.0 ppb
2017-10-25L6965247-3 TTHM2.90 ppb
2017-10-25L6965247-4 TTHM8.70 ppb
2017-12-12S6372166.37 ppb
2017-12-20S771091ND
2017-12-20S7710930.790 ppb
2017-12-20S771095ND
2017-12-20S771097ND
2017-12-20S771099ND
2017-12-20S7711010.530 ppb
2017-12-20S771103ND
2017-12-20S771105ND
2017-12-20S771107ND
2017-12-20S771109ND
2017-12-20S771111ND
2017-12-20S7711130.670 ppb
2017-12-20S771115ND
2017-12-20S771117ND
2018-01-11L6992217-1 TTHM5.90 ppb
2018-01-11L6992217-2 TTHM2.80 ppb
2018-01-11L6992217-3 TTHM7.20 ppb
2018-01-11L6992217-4 TTHM4.40 ppb
2018-04-02L7013585-1 TTHM4.80 ppb
2018-04-02L7013585-2 TTHM2.70 ppb
2018-04-02L7013858-3 TTHM6.30 ppb
2018-04-02L7013858-4 TTHM6.20 ppb
2018-09-17L7073682-1 TTHM8.50 ppb
2018-09-17L7073682-3 TTHM15.0 ppb
2018-09-17L7073682-5 TTHM7.50 ppb
2018-09-18L7073683-1 TTHM3.60 ppb
2018-09-27S782017ND
2018-09-27S782021ND
2018-09-27S782023ND
2018-09-27S782025ND
2018-12-11L7089492-1 TTHM7.50 ppb
2018-12-11L7089492-2 TTHM3.60 ppb
2018-12-11L7089492-3 TTHM9.20 ppb
2018-12-11L7089492-4 TTHM8.80 ppb
2018-12-13S504158ND
2019-03-07L7108274-1 TTHM5.50 ppb
2019-03-07L7108274-3 TTHM2.60 ppb
2019-03-07L7108274-5 TTHM5.20 ppb
2019-03-07L7108274-7 TTHM5.00 ppb
2019-04-12S872258ND
2019-04-16S504176ND
2019-06-05S7711216.01 ppb
2019-06-05S771126ND
2019-06-05S8892604.40 ppb
2019-06-05S8892647.41 ppb
2019-06-05S8892681.14 ppb
2019-08-20S848550ND
2019-08-20S848551ND
2019-08-20S848552ND
2019-08-20S848553ND
2019-08-20S848554ND
2019-08-20S848556ND
2019-08-20S848557ND
2019-08-20S848558ND
2019-08-20S848559ND
2019-08-20S848560ND
2019-08-20S8485610.530 ppb
2019-08-20S848562ND
2019-08-20S848563ND
2019-08-20S848564ND
2019-08-20S848576ND
2019-09-03S8482404.23 ppb
2019-09-03S8482442.39 ppb
2019-09-03S8482485.43 ppb
2019-09-03S8482526.71 ppb
2019-11-20S848254ND
2019-11-20S925180ND
2019-11-21S8482684.17 ppb
2019-11-21S8482707.74 ppb
2019-11-21S8482722.30 ppb
2019-11-21S8482744.32 ppb