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EWG's Tap Water Database — 2021 UPDATE

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Dibromochloromethane

Grafton Waterworks

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.

MORE ABOUT THIS CONTAMINANT

 

157

Samples

0

Samples exceeding legal limit (MCL)

53

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.517 ppb267ND - 6.20 ppb
20150.650 ppb2610ND - 5.40 ppb
20160.737 ppb2611ND - 7.10 ppb
20170.651 ppb248ND - 5.60 ppb
20180.524 ppb258ND - 4.70 ppb
20190.508 ppb309ND - 5.60 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for dibromochloromethane 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
2014-03-10773674ND
2014-03-10773667ND
2014-03-10773656ND
2014-03-10773671ND
2014-03-10773659ND
2014-03-107736680.290 ppb
2014-04-07778332ND
2014-04-07778330ND
2014-04-07778325ND
2014-04-07778326ND
2014-04-077783310.180 ppb
2014-04-077783290.360 ppb
2014-07-29806739ND
2014-07-29806744ND
2014-07-29806738ND
2014-07-29806742ND
2014-07-29806743ND
2014-07-29806745ND
2014-07-298067475.10 ppb
2014-07-298067466.20 ppb
2014-12-15835979ND
2014-12-15835978ND
2014-12-15835983ND
2014-12-15835985ND
2014-12-158359820.310 ppb
2014-12-158359841.000 ppb
2015-03-04846466ND
2015-03-04846463ND
2015-03-04846449ND
2015-03-04846464ND
2015-03-04846451ND
2015-03-048464610.380 ppb
2015-05-26861799ND
2015-05-26861796ND
2015-05-26861792ND
2015-05-26861798ND
2015-05-26861793ND
2015-05-268617971.10 ppb
2015-09-08881969ND
2015-09-08881962ND
2015-09-08881968ND
2015-09-08881963ND
2015-09-09881966ND
2015-09-098819671.000 ppb
2015-09-098819714.10 ppb
2015-09-098819705.40 ppb
2015-12-28899817ND
2015-12-288998190.370 ppb
2015-12-288998200.460 ppb
2015-12-288998180.700 ppb
2015-12-288998131.50 ppb
2015-12-288998141.90 ppb
2016-03-16910611ND
2016-03-16910606ND
2016-03-16910599ND
2016-03-16910601ND
2016-03-169106090.560 ppb
2016-03-169106070.600 ppb
2016-05-16921438ND
2016-05-16921435ND
2016-05-16921431ND
2016-05-16921432ND
2016-05-169214370.490 ppb
2016-05-169214361.50 ppb
2016-08-31942867ND
2016-08-31942864ND
2016-08-31942860ND
2016-08-319428610.410 ppb
2016-08-319428651.10 ppb
2016-09-019428660.580 ppb
2016-09-019428705.70 ppb
2016-09-019428697.10 ppb
2016-11-17960029ND
2016-11-17960026ND
2016-11-17960022ND
2016-11-17960023ND
2016-11-179600280.360 ppb
2016-11-179600270.770 ppb
2017-03-15978080ND
2017-03-15978083ND
2017-03-15978086ND
2017-03-16978076ND
2017-03-169780770.410 ppb
2017-03-169780730.630 ppb
2017-06-281001051ND
2017-06-281001047ND
2017-06-281001043ND
2017-06-281001050ND
2017-06-2810010481.80 ppb
2017-09-201019870ND
2017-09-201019867ND
2017-09-201019863ND
2017-09-201019869ND
2017-09-2010198681.30 ppb
2017-09-2010198724.30 ppb
2017-09-2010198715.60 ppb
2017-12-191034429ND
2017-12-191034426ND
2017-12-191034422ND
2017-12-191034423ND
2017-12-1910344270.480 ppb
2017-12-1910344281.10 ppb
2018-03-141045110ND
2018-03-141045107ND
2018-03-141045103ND
2018-03-141045109ND
2018-03-141045104ND
2018-03-1410451081.10 ppb
2018-06-191062396ND
2018-06-191062389ND
2018-06-191062395ND
2018-06-191062390ND
2018-06-1910623940.710 ppb
2018-09-171080756ND
2018-09-171080752ND
2018-09-171080753ND
2018-09-1710807582.20 ppb
2018-09-1710807574.70 ppb
2018-09-261083609ND
2018-09-2610836080.230 ppb
2018-09-2610836102.00 ppb
2018-11-261094376ND
2018-11-261094369ND
2018-11-2610943700.650 ppb
2018-11-271094374ND
2018-11-271094373ND
2018-11-2710943751.50 ppb
2019-03-181110136ND
2019-03-181110131ND
2019-03-181110134ND
2019-03-181110128ND
2019-03-181110130ND
2019-03-1811101321.10 ppb
2019-04-1711163881.20 ppb
2019-06-171128507ND
2019-06-171128504ND
2019-06-171128501ND
2019-06-171128502ND
2019-06-1711285030.190 ppb
2019-06-1711285060.630 ppb
2019-06-1711285050.680 ppb
2019-09-241151017ND
2019-09-241151014ND
2019-09-241151016ND
2019-09-241151012ND
2019-09-241151013ND
2019-09-2411510110.720 ppb
2019-09-2411510150.830 ppb
2019-09-2411510184.30 ppb
2019-09-2411510195.60 ppb
2019-12-101164883ND
2019-12-101164880ND
2019-12-101164881ND
2019-12-101164882ND
2019-12-101164877ND
2019-12-101164879ND
2019-12-101164878ND