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EWG's Tap Water Database — 2021 UPDATE

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Bromodichloromethane

Roswell Municipal Water System

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

 

94

Samples

0

Samples exceeding legal limit (MCL)

75

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.224 ppb169ND - 0.710 ppb
20150.352 ppb1612ND - 1.50 ppb
20160.312 ppb1614ND - 0.890 ppb
20170.314 ppb1614ND - 0.680 ppb
20180.396 ppb14140.180 ppb - 0.790 ppb
20190.336 ppb1612ND - 0.850 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
2014-02-192014005813ND
2014-02-192014005814ND
2014-02-192014005815ND
2014-02-192014005812ND
2014-04-2220140138750.470 ppb
2014-04-2220140138760.320 ppb
2014-04-2220140138740.270 ppb
2014-04-2220140138770.230 ppb
2014-07-242014023527ND
2014-07-242014023525ND
2014-07-242014023528ND
2014-07-2420140235260.490 ppb
2014-10-2220140332880.710 ppb
2014-10-2220140332860.520 ppb
2014-10-2220140332850.300 ppb
2014-10-2220140332870.270 ppb
2015-01-2020150022060.300 ppb
2015-01-2020150022050.290 ppb
2015-01-2020150022080.140 ppb
2015-01-202015002207ND
2015-04-142015011525ND
2015-04-1420150115240.170 ppb
2015-04-1420150115260.250 ppb
2015-04-1420150115230.630 ppb
2015-07-1420150204390.380 ppb
2015-07-142015020438ND
2015-07-142015020440ND
2015-07-1420150204410.560 ppb
2015-10-2720150322631.50 ppb
2015-10-2720150322640.760 ppb
2015-10-2720150322610.390 ppb
2015-10-2720150322620.260 ppb
2016-01-2620160025560.210 ppb
2016-01-2620160025570.300 ppb
2016-01-2620160025580.320 ppb
2016-01-2720160025550.890 ppb
2016-04-2020160112910.470 ppb
2016-04-2020160112890.230 ppb
2016-04-2020160112900.200 ppb
2016-04-202016011292ND
2016-07-2520160212280.470 ppb
2016-07-2520160212270.380 ppb
2016-07-2520160212300.200 ppb
2016-07-252016021229ND
2016-10-1720160301440.250 ppb
2016-10-1720160301450.120 ppb
2016-10-1720160301460.540 ppb
2016-10-1720160301430.410 ppb
2017-01-1720170013680.680 ppb
2017-01-1720170013660.460 ppb
2017-01-1720170013670.220 ppb
2017-01-1720170013690.170 ppb
2017-04-1720170112680.540 ppb
2017-04-1720170112670.460 ppb
2017-04-1720170112690.340 ppb
2017-04-1720170112700.270 ppb
2017-07-2520170215650.570 ppb
2017-07-252017021564ND
2017-07-2520170215670.190 ppb
2017-07-2520170215660.370 ppb
2017-10-2620170309700.360 ppb
2017-10-2620170309680.280 ppb
2017-10-2620170309710.110 ppb
2017-10-262017030969ND
2018-01-1820180018920.360 ppb
2018-01-1820180018910.790 ppb
2018-01-1820180018900.350 ppb
2018-04-0520180098450.250 ppb
2018-04-0520180098440.510 ppb
2018-04-0520180098430.180 ppb
2018-07-0220180182670.480 ppb
2018-07-0220180182660.410 ppb
2018-07-0220180182650.180 ppb
2018-07-0220180182680.250 ppb
2018-10-0920180288970.390 ppb
2018-10-0920180288980.310 ppb
2018-10-0920180288990.760 ppb
2018-10-0920180289000.330 ppb
2019-01-0920190006810.310 ppb
2019-01-0920190006820.550 ppb
2019-01-0920190006830.340 ppb
2019-01-0920190006840.390 ppb
2019-04-0220190084790.720 ppb
2019-04-022019008480ND
2019-04-0220190084810.270 ppb
2019-04-0220190084780.510 ppb
2019-07-092019018727ND
2019-07-0920190187300.340 ppb
2019-07-0920190187290.190 ppb
2019-07-0920190187280.850 ppb
2019-10-0320190283420.620 ppb
2019-10-0320190283410.290 ppb
2019-10-032019028340ND
2019-10-032019028339ND