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EWG's Tap Water Database

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Bromoform

Del-Co Water Company Inc.

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

 

263

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20100.252 ppb6217ND - 1.20 ppb
20110.0859 ppb648ND - 0.900 ppb
2012ND380ND
2013ND350ND
20140.0156 ppb321ND - 0.500 ppb
2015ND320ND

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.5 ppb

The health guideline of 0.5 ppb for bromoform 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.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-02-0810183701ND
2010-02-0810183801ND
2010-02-1510197501ND
2010-02-1510197502ND
2010-02-1510197503ND
2010-02-1510197504ND
2010-02-1510197601ND
2010-02-1510197602ND
2010-02-1510197603ND
2010-02-1510197604ND
2010-02-15101977010.700 ppb
2010-02-15101977020.600 ppb
2010-02-15101977030.800 ppb
2010-02-15101977041.10 ppb
2010-05-04103818-03ND
2010-05-18104227-010.900 ppb
2010-05-18104227-020.700 ppb
2010-05-18104227-031.000 ppb
2010-05-18104227-041.000 ppb
2010-05-18104228-01ND
2010-05-18104228-02ND
2010-05-18104228-03ND
2010-05-18104228-04ND
2010-05-18104229-01ND
2010-05-18104229-02ND
2010-05-18104229-03ND
2010-05-18104229-04ND
2010-06-07104725-01ND
2010-06-07104725-02ND
2010-06-07104725-03ND
2010-06-07104725-04ND
2010-06-07104726-02A0.500 ppb
2010-08-09106541-01ND
2010-08-09106541-02ND
2010-08-09106541-03ND
2010-08-09106541-04ND
2010-08-09106542-01ND
2010-08-09106542-02ND
2010-08-09106542-03ND
2010-08-09106542-04ND
2010-08-09106543-01ND
2010-08-09106543-02ND
2010-08-09106543-03ND
2010-08-09106543-04ND
2010-08-09106540-011.000 ppb
2010-08-09106540-020.700 ppb
2010-08-09106540-031.000 ppb
2010-08-09106540-041.20 ppb
2010-08-23106930-01ND
2010-11-02108817-01ND
2010-11-08108999-01ND
2010-11-08108999-02ND
2010-11-08108999-03ND
2010-11-08108999-04ND
2010-11-08108998-01ND
2010-11-08108998-02ND
2010-11-08108998-03ND
2010-11-08108998-04ND
2010-11-08109000-010.900 ppb
2010-11-08109000-021.10 ppb
2010-11-08109000-031.20 ppb
2010-11-08109000-041.20 ppb
2011-02-0811-10844-02ND
2011-02-0811-10846-02ND
2011-02-1411-11020-01ND
2011-02-1411-11020-02ND
2011-02-1411-11020-03ND
2011-02-1411-11020-04ND
2011-02-1411-11021-01ND
2011-02-1411-11021-02ND
2011-02-1411-11021-03ND
2011-02-1411-11021-04ND
2011-02-1411-11022-01ND
2011-02-1411-11022-02ND
2011-02-1411-11022-03ND
2011-02-1411-11022-04ND
2011-04-2111-12661-01ND
2011-05-0311-12909-02ND
2011-05-0911-13152-04ND
2011-05-0911-13153-01ND
2011-05-0911-13153-02ND
2011-05-0911-13153-03ND
2011-05-0911-13153-04ND
2011-05-0911-13152-01ND
2011-05-0911-13152-02ND
2011-05-0911-13152-03ND
2011-05-0911-13154-01ND
2011-05-0911-13154-02ND
2011-05-0911-13154-03ND
2011-05-0911-13154-040.500 ppb
2011-06-1511-14239-01ND
2011-06-1511-14239-02ND
2011-06-1511-14239-03ND
2011-06-1511-14239-04ND
2011-06-1511-14240-01BND
2011-07-0611-14775-01ND
2011-08-0211-15630-01ND
2011-08-0911-15938-01ND
2011-08-0911-15938-02ND
2011-08-0911-15938-03ND
2011-08-0911-15938-04ND
2011-08-0911-15941-040.700 ppb
2011-08-0911-15939-01ND
2011-08-0911-15939-02ND
2011-08-0911-15939-03ND
2011-08-0911-15939-04ND
2011-08-0911-15940-01ND
2011-08-0911-15940-02ND
2011-08-0911-15940-03ND
2011-08-0911-15940-04ND
2011-08-0911-15941-010.600 ppb
2011-08-0911-15941-02ND
2011-08-0911-15941-030.600 ppb
2011-11-0811-19356-03ND
2011-11-1611-19694-04ND
2011-11-1611-19695-010.700 ppb
2011-11-1611-19695-020.700 ppb
2011-11-1611-19695-030.900 ppb
2011-11-1611-19695-040.800 ppb
2011-11-1611-19693-01ND
2011-11-1611-19693-02ND
2011-11-1611-19693-03ND
2011-11-1611-19693-04ND
2011-11-1611-19694-01ND
2011-11-1611-19694-02ND
2011-11-1611-19694-03ND
2012-01-0912-10322-01BND
2012-01-0912-10323-01BND
2012-02-1312-11637-01ND
2012-02-1312-11637-02ND
2012-02-1312-11637-06ND
2012-02-1312-11637-07ND
2012-02-1312-11637-08ND
2012-02-1312-11637-03ND
2012-02-1312-11637-04ND
2012-02-1312-11637-05ND
2012-04-0312-13549-02ND
2012-05-1412-15421-01ND
2012-05-1412-15421-02ND
2012-05-1412-15421-03ND
2012-05-1412-15421-04ND
2012-05-1412-15421-05ND
2012-05-1412-15421-06ND
2012-05-1412-15421-07ND
2012-05-1412-15421-08ND
2012-05-3012-16037-03BND
2012-07-0312-17808-01ND
2012-08-1312-19863-01ND
2012-08-1312-19863-02ND
2012-08-1312-19863-03ND
2012-08-1312-19863-04ND
2012-08-1312-19863-06ND
2012-08-1312-19863-07ND
2012-08-1312-19863-08ND
2012-08-1312-19863-05ND
2012-10-0212-22459-01ND
2012-11-1212-24498-01ND
2012-11-1212-24498-02ND
2012-11-1212-24498-03ND
2012-11-1212-24498-04ND
2012-11-1212-24498-05ND
2012-11-1212-24498-06ND
2012-11-1212-24498-07ND
2012-11-1212-24498-08ND
2013-01-0813-10282-01BND
2013-01-0813-10283-01BND
2013-02-1113-11641-01ND
2013-02-1113-11641-02ND
2013-02-1113-11641-03ND
2013-02-1113-11641-04ND
2013-02-1113-11641-05ND
2013-02-1113-11641-06ND
2013-02-1113-11641-07ND
2013-02-1113-11641-08ND
2013-05-1313-15818-01ND
2013-05-1313-15818-02ND
2013-05-1313-15818-03ND
2013-05-1313-15818-04ND
2013-05-1313-15818-05ND
2013-05-1313-15818-06ND
2013-05-1313-15818-07ND
2013-05-1313-15818-08ND
2013-06-1013-17185-01BND
2013-08-1213-20467-01ND
2013-08-1213-20467-02ND
2013-08-1213-20467-03ND
2013-08-1213-20467-05ND
2013-08-1213-20467-06ND
2013-08-1213-20467-07ND
2013-08-1213-20467-08ND
2013-08-1213-20467-04ND
2013-11-1113-25106-01ND
2013-11-1113-25106-02ND
2013-11-1113-25106-03ND
2013-11-1113-25106-04ND
2013-11-1113-25106-05ND
2013-11-1113-25106-06ND
2013-11-1113-25106-07ND
2013-11-1113-25106-08ND
2014-02-1014-11572-01ND
2014-02-1014-11572-02ND
2014-02-1014-11572-03ND
2014-02-1014-11572-04ND
2014-02-1014-11572-05ND
2014-02-1014-11572-06ND
2014-02-1014-11572-07ND
2014-02-1014-11572-08ND
2014-05-1214-15707-02ND
2014-05-1214-15707-03ND
2014-05-1214-15707-04ND
2014-05-1214-15707-05ND
2014-05-1214-15707-06ND
2014-05-1214-15707-07ND
2014-05-1214-15707-08ND
2014-05-1214-15707-01ND
2014-08-1114-20599-01ND
2014-08-1114-20599-02ND
2014-08-1114-20599-03ND
2014-08-1114-20599-04ND
2014-08-1114-20599-05ND
2014-08-1114-20599-06ND
2014-08-1114-20599-07ND
2014-08-1114-20599-08ND
2014-11-1214-25498-01ND
2014-11-1214-25498-02ND
2014-11-1214-25498-03ND
2014-11-1214-25498-04ND
2014-11-1214-25498-05ND
2014-11-1214-25498-06ND
2014-11-1214-25498-07ND
2014-11-1214-25498-080.500 ppb
2015-02-0915-11529-01ND
2015-02-0915-11529-02ND
2015-02-0915-11529-03ND
2015-02-0915-11529-04ND
2015-02-0915-11529-05ND
2015-02-0915-11529-06ND
2015-02-0915-11529-07ND
2015-02-0915-11529-08ND
2015-05-1115-15954-01ND
2015-05-1115-15954-02ND
2015-05-1115-15954-03ND
2015-05-1115-15954-04ND
2015-05-1115-15954-05ND
2015-05-1115-15954-06ND
2015-05-1115-15954-07ND
2015-05-1115-15954-08ND
2015-08-1015-21286-01ND
2015-08-1015-21286-02ND
2015-08-1015-21286-03ND
2015-08-1015-21286-04ND
2015-08-1015-21286-05ND
2015-08-1015-21286-06ND
2015-08-1015-21286-07ND
2015-08-1015-21286-08ND
2015-11-0915-26469-01ND
2015-11-0915-26469-02ND
2015-11-0915-26469-03ND
2015-11-0915-26469-04ND
2015-11-0915-26469-05ND
2015-11-0915-26469-06ND
2015-11-0915-26469-07ND
2015-11-0915-26469-08ND