Menu

EWG's Tap Water Database — 2019 UPDATE

Donate

Bromoform

Los Angeles County WW District 4 & 34-Lancaster

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.

 

311

Samples

0

Samples exceeding legal limit (MCL)

164

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20128.48 ppb5826ND - 47.4 ppb
20137.69 ppb6737ND - 38.5 ppb
20148.04 ppb5832ND - 31.7 ppb
201510.4 ppb5631ND - 32.4 ppb
20167.56 ppb5330ND - 26.3 ppb
20173.84 ppb198ND - 16.4 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
2012-01-245442-002-0842ND
2012-01-245442-053-0903ND
2012-01-245442-054-0937ND
2012-04-105442-093-0751ND
2012-04-105442-094-1110ND
2012-04-105442-095-1130ND
2012-04-125442-011-1040ND
2012-04-125442-054-1015ND
2012-04-135442-800-114020.6 ppb
2012-04-135442-801-122411.9 ppb
2012-04-135442-802-12405.82 ppb
2012-04-135442-803-120018.8 ppb
2012-04-135442-804-125122.6 ppb
2012-04-135442-805-131518.4 ppb
2012-04-135442-806-115524.8 ppb
2012-04-135442-807-130019.6 ppb
2012-06-135442-069-1030ND
2012-07-105442-036-0817ND
2012-07-115442-028-1041ND
2012-07-115442-048-1017ND
2012-07-115442-062-1021ND
2012-07-115442-063-1024ND
2012-07-125442-800-10578.38 ppb
2012-07-125442-801-10025.27 ppb
2012-07-125442-802-103113.1 ppb
2012-07-125442-803-09409.00 ppb
2012-07-125442-804-092612.7 ppb
2012-07-125442-805-090014.0 ppb
2012-07-125442-806-10448.27 ppb
2012-07-125442-807-09158.63 ppb
2012-07-315442-028-0853ND
2012-07-315442-048-0948ND
2012-07-315442-053-1043ND
2012-07-315442-062-0935ND
2012-07-315442-063-1003ND
2012-08-075442-028-1035ND
2012-08-085442-037-1051ND
2012-08-085442-053-0857ND
2012-08-085442-055-1151ND
2012-08-085442-067-0950ND
2012-08-145442-071-1136ND
2012-09-055442-035-0941ND
2012-09-055442-040-0928ND
2012-09-105442-016-0900ND
2012-09-105442-023-0918ND
2012-09-125442-026-0855ND
2012-09-125442-041-0910ND
2012-09-125442-045-0950ND
2012-10-115442-800-102427.9 ppb
2012-10-115442-801-113317.6 ppb
2012-10-115442-802-114441.7 ppb
2012-10-115442-803-111040.0 ppb
2012-10-115442-804-105335.9 ppb
2012-10-115442-805-132047.4 ppb
2012-10-115442-806-103429.0 ppb
2012-10-115442-807-104527.5 ppb
2012-10-125442-800-13001.18 ppb
2012-10-125442-801-13301.69 ppb
2013-01-095442-800-08181.10 ppb
2013-01-095442-800-130018.4 ppb
2013-01-095442-801-101521.6 ppb
2013-01-095442-802-12104.47 ppb
2013-01-095442-803-095022.7 ppb
2013-01-095442-804-093012.7 ppb
2013-01-095442-805-090015.7 ppb
2013-01-095442-806-122023.6 ppb
2013-01-095442-807-091511.0 ppb
2013-01-105442-801-1205ND
2013-02-195442-070-0901ND
2013-02-255442-026-0822ND
2013-02-255442-041-0914ND
2013-02-255442-045-1005ND
2013-03-115442-011-0931ND
2013-04-095442-800-10420.670 ppb
2013-04-095442-801-13120.610 ppb
2013-04-105442-800-12197.38 ppb
2013-04-105442-801-11156.35 ppb
2013-04-105442-802-11316.89 ppb
2013-04-105442-803-10439.84 ppb
2013-04-105442-804-10279.87 ppb
2013-04-105442-805-094813.0 ppb
2013-04-105442-806-11484.52 ppb
2013-04-105442-807-100810.5 ppb
2013-06-045442-070-1130ND
2013-07-095442-036-0816ND
2013-07-105442-800-09559.70 ppb
2013-07-105442-800-123010.7 ppb
2013-07-105442-801-102512.8 ppb
2013-07-105442-801-13077.73 ppb
2013-07-105442-802-125715.8 ppb
2013-07-105442-803-120017.2 ppb
2013-07-105442-804-113219.6 ppb
2013-07-105442-805-110018.8 ppb
2013-07-105442-806-12424.84 ppb
2013-07-105442-807-112113.2 ppb
2013-07-165442-028-0943ND
2013-07-165442-041-0900ND
2013-07-165442-045-1050ND
2013-07-165442-048-1037ND
2013-07-165442-062-1041ND
2013-07-165442-063-1033ND
2013-07-165442-094-0859ND
2013-07-165442-095-0832ND
2013-07-235442-040-0924ND
2013-07-235442-071-1047ND
2013-07-245442-055-0853ND
2013-07-245442-069-1002ND
2013-07-295442-002-1043ND
2013-07-295442-054-0830ND
2013-08-065442-067-1035ND
2013-08-135442-035-1134ND
2013-08-145442-037-1048ND
2013-09-035442-026-0935ND
2013-09-045442-016-1006ND
2013-09-045442-023-0950ND
2013-10-095442-800-125012.1 ppb
2013-10-095442-801-110014.1 ppb
2013-10-095442-802-112521.7 ppb
2013-10-095442-803-103038.5 ppb
2013-10-095442-804-101528.6 ppb
2013-10-095442-805-120527.5 ppb
2013-10-095442-806-122521.4 ppb
2013-10-095442-807-100020.3 ppb
2013-11-125442-093-1033ND
2013-11-185442-053-1123ND
2014-01-105442-800-112615.6 ppb
2014-01-105442-801-101223.7 ppb
2014-01-105442-802-10272.20 ppb
2014-01-105442-803-095621.3 ppb
2014-01-105442-804-092521.2 ppb
2014-01-105442-805-084424.7 ppb
2014-01-105442-806-110218.2 ppb
2014-01-105442-807-090819.3 ppb
2014-03-185442-011-0830ND
2014-04-085442-802-12454.00 ppb
2014-04-085442-803-10053.70 ppb
2014-04-085442-804-09159.40 ppb
2014-04-085442-805-083015.0 ppb
2014-04-085442-807-09058.10 ppb
2014-04-095442-093-1000ND
2014-04-095442-800-095026.0 ppb
2014-04-095442-801-0910ND
2014-04-095442-806-093013.0 ppb
2014-06-175442-069-0900ND
2014-06-175442-070-0912ND
2014-07-075442-800-090012.6 ppb
2014-07-075442-806-083531.7 ppb
2014-07-085442-048-0902ND
2014-07-085442-062-0856ND
2014-07-085442-801-10407.06 ppb
2014-07-085442-802-120718.6 ppb
2014-07-085442-803-093016.4 ppb
2014-07-085442-804-084517.2 ppb
2014-07-085442-805-080023.1 ppb
2014-07-085442-807-083513.5 ppb
2014-07-095442-041-0907ND
2014-07-095442-045-1024ND
2014-07-105442-071-1100ND
2014-07-105442-094-1000ND
2014-07-105442-095-1007ND
2014-07-175442-067-1026ND
2014-07-225442-002-1150ND
2014-07-225442-036-0904ND
2014-07-225442-040-0855ND
2014-07-225442-053-1120ND
2014-07-225442-054-1135ND
2014-07-225442-055-0947ND
2014-07-245442-063-1110ND
2014-08-195442-035-1015ND
2014-08-265442-037-0845ND
2014-09-095442-016-1100ND
2014-09-095442-023-1100ND
2014-09-305442-026-0855ND
2014-09-305442-028-0940ND
2014-10-065442-800-131814.3 ppb
2014-10-065442-806-08301.22 ppb
2014-10-075442-801-10447.81 ppb
2014-10-075442-802-11568.71 ppb
2014-10-075442-803-09409.52 ppb
2014-10-075442-804-085917.5 ppb
2014-10-075442-805-082022.1 ppb
2014-10-075442-807-085018.1 ppb
2014-10-085442-806-13391.54 ppb
2015-01-125442-800-130520.5 ppb
2015-01-125442-806-133120.3 ppb
2015-01-135442-801-1050ND
2015-01-135442-802-12304.74 ppb
2015-01-135442-803-09508.14 ppb
2015-01-135442-804-09109.96 ppb
2015-01-135442-805-083016.2 ppb
2015-01-135442-807-09108.81 ppb
2015-03-045442-011-1020ND
2015-04-075442-093-0918ND
2015-04-085442-800-102019.9 ppb
2015-04-085442-801-111231.9 ppb
2015-04-085442-802-10562.72 ppb
2015-04-085442-803-11308.98 ppb
2015-04-085442-804-114316.4 ppb
2015-04-085442-805-130722.5 ppb
2015-04-085442-806-104519.1 ppb
2015-04-085442-807-115118.9 ppb
2015-04-145442-068-1110ND
2015-06-025442-069-1100ND
2015-06-025442-070-1010ND
2015-07-065442-028-1150ND
2015-07-065442-048-1115ND
2015-07-065442-062-1120ND
2015-07-075442-026-0850ND
2015-07-075442-041-0828ND
2015-07-075442-045-0938ND
2015-07-075442-802-123012.9 ppb
2015-07-075442-803-100030.0 ppb
2015-07-075442-804-094531.1 ppb
2015-07-075442-805-144032.4 ppb
2015-07-075442-807-133030.0 ppb
2015-07-085442-067-0922ND
2015-07-085442-071-1100ND
2015-07-085442-095-1145ND
2015-07-085442-806-123031.3 ppb
2015-07-135442-040-0850ND
2015-07-145442-053-0945ND
2015-07-145442-054-0930ND
2015-07-155442-800-114020.3 ppb
2015-07-155442-801-084422.5 ppb
2015-07-275442-055-1155ND
2015-08-125442-035-0925ND
2015-08-125442-036-0910ND
2015-08-185442-037-0930ND
2015-09-215442-016-0856ND
2015-09-215442-023-0905ND
2015-10-075442-800-131010.9 ppb
2015-10-075442-802-12383.33 ppb
2015-10-075442-803-091726.6 ppb
2015-10-075442-804-090725.7 ppb
2015-10-075442-805-082823.6 ppb
2015-10-075442-806-132526.4 ppb
2015-10-075442-807-085020.6 ppb
2015-11-125442-801-10307.14 ppb
2015-12-165442-094-1015ND
2016-01-115442-800-123511.7 ppb
2016-01-115442-806-125715.9 ppb
2016-01-135442-801-105312.9 ppb
2016-01-135442-802-111910.3 ppb
2016-01-135442-803-103410.7 ppb
2016-01-135442-804-092220.2 ppb
2016-01-135442-805-082126.3 ppb
2016-01-135442-807-090418.9 ppb
2016-01-195442-035-0950ND
2016-01-195442-040-0945ND
2016-01-255442-028-0840ND
2016-01-255442-048-0940ND
2016-01-255442-062-0930ND
2016-01-265442-093-1100ND
2016-02-095442-069-1010ND
2016-02-095442-070-1110ND
2016-02-105442-071-1125ND
2016-03-095442-023-1041ND
2016-03-285442-011-1138ND
2016-03-285442-055-1126ND
2016-03-285442-067-0856ND
2016-04-145442-800-10055.88 ppb
2016-04-145442-801-11034.99 ppb
2016-04-145442-802-10452.52 ppb
2016-04-145442-803-111819.5 ppb
2016-04-145442-804-113511.0 ppb
2016-04-145442-805-120710.00 ppb
2016-04-145442-806-10236.61 ppb
2016-04-145442-807-11467.48 ppb
2016-04-205442-026-1016ND
2016-04-205442-041-0934ND
2016-06-085442-036-0945ND
2016-06-275442-094-1125ND
2016-06-275442-095-1050ND
2016-06-285442-037-1132ND
2016-06-285442-053-1155ND
2016-06-285442-054-1152ND
2016-07-155442-800-10568.73 ppb
2016-07-155442-801-09588.09 ppb
2016-07-155442-802-101816.7 ppb
2016-07-155442-803-093614.2 ppb
2016-07-155442-804-091618.7 ppb
2016-07-155442-805-084216.5 ppb
2016-07-155442-806-111514.2 ppb
2016-07-155442-807-090112.2 ppb
2016-08-315442-016-1105ND
2016-10-135442-802-12439.48 ppb
2016-10-135442-804-120322.2 ppb
2016-10-145442-800-103619.2 ppb
2016-10-145442-801-090515.1 ppb
2016-10-145442-802-09366.40 ppb
2016-10-145442-806-101123.9 ppb
2016-12-155442-045-0911ND
2017-01-115442-802-11121.50 ppb
2017-01-115442-803-10566.18 ppb
2017-01-125442-804-105112.0 ppb
2017-01-125442-805-102016.4 ppb
2017-01-125442-806-11152.29 ppb
2017-01-125442-807-103811.3 ppb
2017-01-255442-800-124513.2 ppb
2017-01-255442-801-102010.00 ppb
2017-07-109588-800-0802ND
2017-07-109588-801-0904ND
2017-07-109588-802-0833ND
2017-07-109588-803-0949ND
2017-07-109588-804-1012ND
2017-07-109588-805-1015ND
2017-07-109588-806-1112ND
2017-07-109588-807-0926ND
2017-07-189588-063-0950ND
2017-11-219590-045-0935ND
2017-12-272920-068-0935ND