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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Zachary Water System

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.

MORE ABOUT THIS CONTAMINANT

 

192

Samples

0

Samples exceeding legal limit (MCL)

32

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.524 ppb3220ND - 1.40 ppb
20150.449 ppb3224ND - 1.000 ppb
20160.203 ppb3218ND - 0.720 ppb
2017ND320ND
2018ND320ND
20190.0656 ppb324ND - 0.580 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
2014-02-03680-98429-120.930 ppb
2014-02-03680-98429-141.10 ppb
2014-02-03680-98429-15ND
2014-02-03680-98429-120.930 ppb
2014-02-03680-98429-141.10 ppb
2014-02-03680-98429-15ND
2014-02-04680-98429-13ND
2014-02-04680-98429-13ND
2014-05-07680-101146-10.950 ppb
2014-05-07680-101146-2ND
2014-05-07680-101146-30.630 ppb
2014-05-07680-101146-40.500 ppb
2014-05-07680-101146-10.950 ppb
2014-05-07680-101146-2ND
2014-05-07680-101146-30.630 ppb
2014-05-07680-101146-40.500 ppb
2014-08-18680-104374-30.670 ppb
2014-08-18680-104374-4ND
2014-08-18680-104374-51.40 ppb
2014-08-18680-104374-61.000 ppb
2014-08-18680-104374-30.670 ppb
2014-08-18680-104374-4ND
2014-08-18680-104374-51.40 ppb
2014-08-18680-104374-61.000 ppb
2014-11-28680-107936-10.730 ppb
2014-11-28680-107936-20.480 ppb
2014-11-28680-107936-3ND
2014-11-28680-107936-4ND
2014-11-28680-107936-10.730 ppb
2014-11-28680-107936-20.480 ppb
2014-11-28680-107936-3ND
2014-11-28680-107936-4ND
2015-02-24680-110191-10.840 ppb
2015-02-24680-110191-20.670 ppb
2015-02-24680-110191-31.000 ppb
2015-02-24680-110191-40.730 ppb
2015-02-24680-110191-10.840 ppb
2015-02-24680-110191-20.670 ppb
2015-02-24680-110191-31.000 ppb
2015-02-24680-110191-40.730 ppb
2015-05-26680-112991-10.730 ppb
2015-05-26680-112991-20.500 ppb
2015-05-26680-112991-30.420 ppb
2015-05-26680-112991-40.410 ppb
2015-05-26680-112991-10.730 ppb
2015-05-26680-112991-20.500 ppb
2015-05-26680-112991-30.420 ppb
2015-05-26680-112991-40.410 ppb
2015-08-05680-115334-10.430 ppb
2015-08-05680-115334-2ND
2015-08-05680-115334-3ND
2015-08-05680-115334-40.550 ppb
2015-08-05680-115334-10.430 ppb
2015-08-05680-115334-2ND
2015-08-05680-115334-3ND
2015-08-05680-115334-40.550 ppb
2015-11-09680-118907-10ND
2015-11-09680-118907-11ND
2015-11-09680-118907-120.450 ppb
2015-11-09680-118907-90.460 ppb
2015-11-09680-118907-10ND
2015-11-09680-118907-11ND
2015-11-09680-118907-120.450 ppb
2015-11-09680-118907-90.460 ppb
2016-02-16680-122002-1ND
2016-02-16680-122002-2ND
2016-02-16680-122002-3ND
2016-02-16680-122002-40.470 ppb
2016-02-16680-122002-1ND
2016-02-16680-122002-2ND
2016-02-16680-122002-3ND
2016-02-16680-122002-40.470 ppb
2016-05-20680-125729-10.340 ppb
2016-05-20680-125729-20.260 ppb
2016-05-20680-125729-30.230 ppb
2016-05-20680-125729-40.350 ppb
2016-05-20680-125729-10.340 ppb
2016-05-20680-125729-20.260 ppb
2016-05-20680-125729-30.230 ppb
2016-05-20680-125729-40.350 ppb
2016-08-09680-128555-1ND
2016-08-09680-128555-2ND
2016-08-09680-128555-3ND
2016-08-09680-128555-4ND
2016-08-09680-128555-1ND
2016-08-09680-128555-2ND
2016-08-09680-128555-3ND
2016-08-09680-128555-4ND
2016-11-07680-131872-10.330 ppb
2016-11-07680-131872-20.370 ppb
2016-11-07680-131872-30.180 ppb
2016-11-07680-131872-40.720 ppb
2016-11-07680-131872-10.330 ppb
2016-11-07680-131872-20.370 ppb
2016-11-07680-131872-30.180 ppb
2016-11-07680-131872-40.720 ppb
2017-02-0935294573002ND
2017-02-0935294573003ND
2017-02-0935294573004ND
2017-02-0935294573005ND
2017-02-0935294573002ND
2017-02-0935294573003ND
2017-02-0935294573004ND
2017-02-0935294573005ND
2017-05-0535310607001ND
2017-05-0535310607002ND
2017-05-0535310607003ND
2017-05-0535310607004ND
2017-05-0535310607001ND
2017-05-0535310607002ND
2017-05-0535310607003ND
2017-05-0535310607004ND
2017-08-1035330068001ND
2017-08-1035330068002ND
2017-08-1035330068003ND
2017-08-1035330068004ND
2017-08-1035330068001ND
2017-08-1035330068002ND
2017-08-1035330068003ND
2017-08-1035330068004ND
2017-11-0235346239001ND
2017-11-0235346239002ND
2017-11-0235346239003ND
2017-11-0235346239004ND
2017-11-0235346239001ND
2017-11-0235346239002ND
2017-11-0235346239003ND
2017-11-0235346239004ND
2018-02-0135371906001ND
2018-02-0135371906002ND
2018-02-0135371906003ND
2018-02-0135371906004ND
2018-02-0135371906001ND
2018-02-0135371906002ND
2018-02-0135371906003ND
2018-02-0135371906004ND
2018-05-0435390335001ND
2018-05-0435390335002ND
2018-05-0435390335003ND
2018-05-0435390335004ND
2018-05-0435390335001ND
2018-05-0435390335002ND
2018-05-0435390335003ND
2018-05-0435390335004ND
2018-08-1735412007001ND
2018-08-1735412007002ND
2018-08-1735412007003ND
2018-08-1735412007004ND
2018-08-1735412007001ND
2018-08-1735412007002ND
2018-08-1735412007003ND
2018-08-1735412007004ND
2018-11-0235428205001ND
2018-11-0235428205002ND
2018-11-0235428205003ND
2018-11-0235428205004ND
2018-11-0235428205001ND
2018-11-0235428205002ND
2018-11-0235428205003ND
2018-11-0235428205004ND
2019-02-0135445755001ND
2019-02-0135445755002ND
2019-02-0135445755003ND
2019-02-0135445755004ND
2019-02-0135445755001ND
2019-02-0135445755002ND
2019-02-0135445755003ND
2019-02-0135445755004ND
2019-05-0135465408001ND
2019-05-0135465408002ND
2019-05-0135465408003ND
2019-05-01354654080040.580 ppb
2019-05-0135465408001ND
2019-05-0135465408002ND
2019-05-0135465408003ND
2019-05-01354654080040.580 ppb
2019-08-1935493980001ND
2019-08-1935493980002ND
2019-08-1935493980003ND
2019-08-19354939800040.470 ppb
2019-08-1935493980001ND
2019-08-1935493980002ND
2019-08-1935493980003ND
2019-08-19354939800040.470 ppb
2019-11-0535510875001ND
2019-11-0535510875002ND
2019-11-0535510875003ND
2019-11-0535510875004ND
2019-11-0535510875001ND
2019-11-0535510875002ND
2019-11-0535510875003ND
2019-11-0535510875004ND