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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

San Antonio Water System Northeast

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.

 

107

Samples

0

Samples exceeding legal limit (MCL)

72

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.57 ppb1911ND - 8.40 ppb
20131.61 ppb17171.10 ppb - 2.40 ppb
20141.35 ppb1714ND - 2.90 ppb
20150.795 ppb2011ND - 2.10 ppb
20160.763 ppb167ND - 2.60 ppb
20171.79 ppb1812ND - 8.10 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.5 ppb

The EWG 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

All test results

Date Lab ID Result
2012-01-0412010700012.10 ppb
2012-01-0412010700022.10 ppb
2012-01-0412010700032.10 ppb
2012-01-0412010700042.10 ppb
2012-05-2112056650081.83 ppb
2012-05-211205665010ND
2012-05-2112056650123.55 ppb
2012-05-211205665014ND
2012-05-2112056650151.90 ppb
2012-05-211205665016ND
2012-05-211205665017ND
2012-07-061207217001ND
2012-07-0612072170021.60 ppb
2012-07-061207217003ND
2012-07-061207217004ND
2012-10-0212101000012.20 ppb
2012-10-0212101000022.00 ppb
2012-10-021210100003ND
2012-10-0212101000048.40 ppb
2013-02-05AC098062.00 ppb
2013-02-05AC098102.20 ppb
2013-02-05AC098141.70 ppb
2013-02-05AC098022.40 ppb
2013-04-09AC160881.50 ppb
2013-04-09AC160891.30 ppb
2013-04-09AC160931.40 ppb
2013-04-09AC160901.50 ppb
2013-07-02AC237571.40 ppb
2013-07-02AC237531.60 ppb
2013-07-02AC237611.10 ppb
2013-07-02AC237541.40 ppb
2013-11-21AC358481.40 ppb
2013-12-26AC382201.50 ppb
2013-12-26AC382211.60 ppb
2013-12-26AC382181.70 ppb
2013-12-26AC382191.60 ppb
2014-02-14AC431001.60 ppb
2014-02-14AC431061.80 ppb
2014-02-14AC430441.70 ppb
2014-02-14AC430481.50 ppb
2014-04-02AC491241.60 ppb
2014-04-02AC490951.90 ppb
2014-04-02AC490852.10 ppb
2014-04-02AC491061.60 ppb
2014-07-02AC587671.000 ppb
2014-07-02AC587641.20 ppb
2014-07-02AC587741.10 ppb
2014-07-02AC587752.90 ppb
2014-09-02AC654511.50 ppb
2014-10-02AC68793ND
2014-10-02AC687941.50 ppb
2014-10-02AC68790ND
2014-10-02AC68767ND
2015-01-15AC764201.000 ppb
2015-01-15AC764441.30 ppb
2015-01-15AC764431.30 ppb
2015-01-15AC764291.10 ppb
2015-05-01AC90234ND
2015-05-01AC90254ND
2015-05-01AC90248ND
2015-05-01AC90249ND
2015-07-08AC98749ND
2015-07-08AC987531.60 ppb
2015-07-08AC98747ND
2015-07-08AC98706ND
2015-07-08AC98710ND
2015-07-08AC987091.60 ppb
2015-07-08AC98708ND
2015-07-09AC989961.000 ppb
2015-10-14AD105981.10 ppb
2015-10-14AD105912.10 ppb
2015-10-14AD105861.90 ppb
2015-10-14AD105991.90 ppb
2016-01-12AD17559ND
2016-01-12AD17563ND
2016-01-12AD17533ND
2016-01-12AD17532ND
2016-04-04AD31635ND
2016-04-04AD316391.50 ppb
2016-04-04AD316341.30 ppb
2016-04-04AD31636ND
2016-07-20AD448801.30 ppb
2016-07-20AD44875ND
2016-07-20AD448701.90 ppb
2016-07-20AD448781.60 ppb
2016-10-12AD531182.00 ppb
2016-10-12AD53120ND
2016-10-12AD531192.60 ppb
2016-10-12AD53135ND
2017-01-05AD631921.80 ppb
2017-01-05AD63196ND
2017-01-05AD631902.00 ppb
2017-01-05AD63193ND
2017-04-03AD780361.40 ppb
2017-04-03AD78034ND
2017-04-03AD780372.10 ppb
2017-04-03AD780391.50 ppb
2017-07-07AD886531.000 ppb
2017-07-07AD88636ND
2017-07-07AD886372.10 ppb
2017-07-07AD886301.80 ppb
2017-12-04AE065458.10 ppb
2017-12-04AE06537ND
2017-12-04AE065427.20 ppb
2017-12-04AE065431.70 ppb
2017-12-04AE065781.60 ppb
2017-12-13AE07674ND