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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

City of Carlsbad

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.

 

158

Samples

0

Samples exceeding legal limit (MCL)

143

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20126.68 ppb22223.10 ppb - 12.0 ppb
20133.58 ppb32321.30 ppb - 8.70 ppb
20142.46 ppb32321.20 ppb - 6.00 ppb
20151.63 ppb3228ND - 3.00 ppb
20161.49 ppb3226ND - 3.20 ppb
20173.04 ppb3025ND - 9.00 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
2013-02-202706-900-10108.40 ppb
2013-02-202706-901-10448.70 ppb
2013-02-202706-902-11127.10 ppb
2013-02-202706-903-10565.70 ppb
2013-02-202706-904-11286.50 ppb
2013-02-202706-905-11556.40 ppb
2013-02-202706-906-09557.10 ppb
2013-02-202706-907-10226.10 ppb
2013-05-082706-900-10112.70 ppb
2013-05-082706-901-09403.30 ppb
2013-05-082706-902-09004.10 ppb
2013-05-082706-903-09143.40 ppb
2013-05-082706-904-08302.80 ppb
2013-05-082706-905-10523.40 ppb
2013-05-082706-906-10313.10 ppb
2013-05-082706-907-09583.20 ppb
2013-08-212706-900-12432.40 ppb
2013-08-212706-901-13322.00 ppb
2013-08-212706-902-14242.30 ppb
2013-08-212706-903-14102.00 ppb
2013-08-212706-904-14552.10 ppb
2013-08-212706-905-12102.10 ppb
2013-08-212706-906-13072.10 ppb
2013-08-212706-907-12542.20 ppb
2013-11-142706-900-08292.00 ppb
2013-11-142706-901-08592.20 ppb
2013-11-142706-902-09452.10 ppb
2013-11-142706-903-09232.20 ppb
2013-11-142706-904-07001.80 ppb
2013-11-142706-905-07422.10 ppb
2013-11-142706-906-08001.70 ppb
2013-11-142706-907-08461.30 ppb
2014-02-122706-901-13461.30 ppb
2014-02-122706-902-14101.40 ppb
2014-02-122706-903-13511.50 ppb
2014-02-122706-904-12191.50 ppb
2014-02-122706-904-13081.50 ppb
2014-02-122706-905-12451.40 ppb
2014-02-122706-906-13261.50 ppb
2014-02-122706-907-13161.30 ppb
2014-05-142706-900-09171.50 ppb
2014-05-142706-901-10241.40 ppb
2014-05-142706-903-10471.40 ppb
2014-05-142706-905-08451.60 ppb
2014-05-142706-906-09551.60 ppb
2014-05-142706-907-09361.60 ppb
2014-05-152706-902-10191.20 ppb
2014-05-152706-904-08451.30 ppb
2014-08-152706-900-14096.00 ppb
2014-08-152706-901-14516.00 ppb
2014-08-152706-902-15154.90 ppb
2014-08-152706-903-15025.60 ppb
2014-08-152706-904-13375.10 ppb
2014-08-152706-905-15585.40 ppb
2014-08-152706-906-14325.40 ppb
2014-08-152706-907-14205.90 ppb
2014-11-042706-900-08481.50 ppb
2014-11-042706-901-09411.60 ppb
2014-11-042706-902-10211.30 ppb
2014-11-042706-903-10021.30 ppb
2014-11-042706-904-07331.50 ppb
2014-11-042706-905-08001.30 ppb
2014-11-042706-906-09191.50 ppb
2014-11-042706-907-09021.50 ppb
2015-02-102706-900-13531.60 ppb
2015-02-102706-901-13251.70 ppb
2015-02-102706-902-14081.50 ppb
2015-02-102706-903-14501.60 ppb
2015-02-102706-904-11411.70 ppb
2015-02-102706-905-12521.80 ppb
2015-02-102706-906-13102.00 ppb
2015-02-102706-907-13341.60 ppb
2015-05-132706-900-11092.80 ppb
2015-05-132706-901-11342.60 ppb
2015-05-132706-902-12092.80 ppb
2015-05-132706-903-11513.00 ppb
2015-05-132706-904-10112.00 ppb
2015-05-132706-905-10362.40 ppb
2015-05-132706-906-10512.70 ppb
2015-05-132706-907-11212.50 ppb
2015-08-252706-900-09451.80 ppb
2015-08-252706-901-10151.60 ppb
2015-08-252706-902-10481.20 ppb
2015-08-252706-903-10331.20 ppb
2015-08-252706-904-07351.30 ppb
2015-08-252706-905-08101.50 ppb
2015-08-252706-906-09201.40 ppb
2015-08-252706-907-09551.90 ppb
2015-11-172706-900-12581.70 ppb
2015-11-172706-901-13381.60 ppb
2015-11-172706-904-1110ND
2015-11-172706-905-1159ND
2015-11-172706-906-1242ND
2015-11-172706-907-13131.60 ppb
2015-11-182706-902-0930ND
2015-11-182706-903-09031.20 ppb
2016-02-032706-900-0942ND
2016-02-032706-901-1120ND
2016-02-032706-902-12301.10 ppb
2016-02-032706-903-11441.10 ppb
2016-02-032706-904-0825ND
2016-02-032706-905-0856ND
2016-02-032706-906-09211.000 ppb
2016-02-032706-907-10051.000 ppb
2016-05-092706-900-09062.40 ppb
2016-05-092706-901-09532.20 ppb
2016-05-092706-902-10401.70 ppb
2016-05-092706-903-10153.10 ppb
2016-05-092706-904-0757ND
2016-05-092706-905-08211.80 ppb
2016-05-092706-906-08532.60 ppb
2016-05-092706-907-09272.40 ppb
2016-08-092706-900-13022.20 ppb
2016-08-092706-901-14122.40 ppb
2016-08-092706-902-15072.40 ppb
2016-08-092706-903-14353.20 ppb
2016-08-092706-904-11251.50 ppb
2016-08-092706-905-11461.50 ppb
2016-08-092706-906-13521.70 ppb
2016-08-092706-907-13312.10 ppb
2016-11-082706-900-14241.40 ppb
2016-11-082706-901-15081.50 ppb
2016-11-082706-902-14571.30 ppb
2016-11-082706-903-15222.40 ppb
2016-11-082706-904-15481.000 ppb
2016-11-082706-905-1348ND
2016-11-082706-906-14101.30 ppb
2016-11-082706-907-14401.30 ppb
2017-02-212706-900-15048.30 ppb
2017-02-212706-901-14256.60 ppb
2017-02-212706-902-13505.40 ppb
2017-02-212706-903-14106.20 ppb
2017-02-212706-904-13327.00 ppb
2017-02-212706-906-15279.00 ppb
2017-02-212706-907-14484.60 ppb
2017-05-102706-900-09541.30 ppb
2017-05-102706-901-10452.70 ppb
2017-05-102706-902-1121ND
2017-05-102706-903-1105ND
2017-05-102706-904-0805ND
2017-05-102706-905-0839ND
2017-05-102706-906-1020ND
2017-05-102706-907-10052.40 ppb
2017-08-172706-900-11552.30 ppb
2017-08-172706-901-10213.10 ppb
2017-08-172706-902-10542.60 ppb
2017-08-172706-903-10002.70 ppb
2017-08-172706-904-09262.30 ppb
2017-08-172706-905-09001.80 ppb
2017-08-172706-906-11222.50 ppb
2017-08-172706-907-11402.40 ppb
2017-11-062706-900-13394.50 ppb
2017-11-062706-901-11282.40 ppb
2017-11-062706-902-14002.00 ppb
2017-11-062706-903-10022.80 ppb
2017-11-062706-904-12182.20 ppb
2017-11-062706-906-13182.00 ppb
2017-11-062706-907-11532.10 ppb