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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

California Water Service Company - Dominguez

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.

 

411

Samples

0

Samples exceeding legal limit (MCL)

299

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20127.39 ppb6345ND - 58.5 ppb
20132.85 ppb7052ND - 8.86 ppb
20141.42 ppb7754ND - 4.56 ppb
20152.17 ppb6447ND - 4.93 ppb
20162.18 ppb6247ND - 6.50 ppb
20173.04 ppb7554ND - 10.00 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
2012-01-195701-056-102044.4 ppb
2012-01-255701-023-1508ND
2012-02-215701-056-093043.6 ppb
2012-02-225701-018-1135ND
2012-03-075701-056-103043.2 ppb
2012-03-075701-804-111050.7 ppb
2012-03-075701-805-110058.5 ppb
2012-03-219590-019-1450ND
2012-03-219590-022-1548ND
2012-03-219590-024-1340ND
2012-03-285701-055-10301.82 ppb
2012-04-045701-805-11346.68 ppb
2012-04-115701-804-11104.00 ppb
2012-05-075701-800-13155.86 ppb
2012-05-075701-801-13340.570 ppb
2012-05-075701-802-13504.96 ppb
2012-05-075701-803-14304.27 ppb
2012-05-075701-804-11483.93 ppb
2012-05-075701-805-11155.13 ppb
2012-05-075701-806-12496.06 ppb
2012-05-075701-807-14165.66 ppb
2012-05-095701-805-11025.97 ppb
2012-06-139590-019-0940ND
2012-06-135701-805-11505.05 ppb
2012-06-275701-048-10450.710 ppb
2012-06-275701-055-12112.11 ppb
2012-06-285701-024-1405ND
2012-07-115701-805-11514.46 ppb
2012-07-185701-050-1053ND
2012-08-089590-004-1338ND
2012-08-089590-018-1415ND
2012-08-085701-800-13383.36 ppb
2012-08-085701-801-14250.810 ppb
2012-08-085701-802-12583.60 ppb
2012-08-085701-803-11222.95 ppb
2012-08-085701-804-10523.67 ppb
2012-08-085701-805-11173.87 ppb
2012-08-085701-806-10343.77 ppb
2012-08-085701-807-11563.62 ppb
2012-08-155701-805-11153.26 ppb
2012-08-205701-036-1315ND
2012-09-059590-019-1043ND
2012-09-125701-805-11095.95 ppb
2012-09-195701-048-11550.570 ppb
2012-09-195701-055-09501.84 ppb
2012-09-265701-016-1300ND
2012-09-265701-024-1015ND
2012-10-105701-805-11076.42 ppb
2012-11-075701-800-130512.4 ppb
2012-11-075701-801-135012.5 ppb
2012-11-075701-802-125011.6 ppb
2012-11-075701-803-114110.6 ppb
2012-11-075701-804-113213.6 ppb
2012-11-075701-805-120512.4 ppb
2012-11-075701-806-111014.9 ppb
2012-11-075701-807-10459.80 ppb
2012-11-145701-805-11257.51 ppb
2012-11-195701-018-1357ND
2012-12-059590-019-1345ND
2012-12-055701-805-11325.85 ppb
2012-12-195810-024-1313ND
2012-12-199590-048-1208ND
2012-12-199590-055-14463.30 ppb
2013-01-165701-805-11406.60 ppb
2013-02-065701-805-11178.86 ppb
2013-02-075701-800-14226.32 ppb
2013-02-075701-801-14344.71 ppb
2013-02-075701-802-14486.54 ppb
2013-02-075701-803-15197.86 ppb
2013-02-075701-804-13478.05 ppb
2013-02-075701-805-13287.79 ppb
2013-02-075701-806-14026.94 ppb
2013-02-075701-807-15055.77 ppb
2013-02-205701-018-1410ND
2013-03-069590-019-0905ND
2013-03-069590-024-1002ND
2013-03-135701-048-11300.660 ppb
2013-03-135701-055-09583.04 ppb
2013-03-135701-805-10585.45 ppb
2013-04-015701-058-10451.31 ppb
2013-04-155701-805-14104.57 ppb
2013-05-085701-800-12313.21 ppb
2013-05-085701-801-13030.840 ppb
2013-05-085701-802-11423.17 ppb
2013-05-085701-803-11133.19 ppb
2013-05-085701-804-11104.51 ppb
2013-05-085701-805-11474.19 ppb
2013-05-085701-806-10443.25 ppb
2013-05-085701-807-11253.19 ppb
2013-05-145701-805-10293.59 ppb
2013-05-235701-018-1050ND
2013-06-059590-019-1305ND
2013-06-125701-805-11323.41 ppb
2013-06-185701-023-1320ND
2013-06-185701-048-11491.14 ppb
2013-06-185701-055-10243.17 ppb
2013-06-245701-024-1120ND
2013-07-105701-805-11003.60 ppb
2013-07-175701-050-1407ND
2013-08-079590-018-1207ND
2013-08-075701-800-13212.84 ppb
2013-08-075701-801-14052.26 ppb
2013-08-075701-802-13052.16 ppb
2013-08-075701-803-11442.68 ppb
2013-08-075701-804-11272.80 ppb
2013-08-075701-805-11552.85 ppb
2013-08-075701-806-10362.68 ppb
2013-08-075701-807-11042.60 ppb
2013-09-105701-036-1400ND
2013-09-119590-022-1432ND
2013-09-115701-805-11052.68 ppb
2013-09-189590-016-1353ND
2013-09-189590-019-1127ND
2013-09-185810-048-12561.000 ppb
2013-09-185810-055-11054.60 ppb
2013-09-199590-004-1436ND
2013-09-255701-024-1102ND
2013-10-165701-805-11584.67 ppb
2013-11-065701-800-12023.48 ppb
2013-11-065701-801-13202.69 ppb
2013-11-065701-802-11451.41 ppb
2013-11-065701-803-11143.51 ppb
2013-11-065701-804-12404.20 ppb
2013-11-065701-805-13103.71 ppb
2013-11-065701-806-11443.42 ppb
2013-11-065701-807-12022.78 ppb
2013-11-135701-805-11255.91 ppb
2013-11-209590-018-1400ND
2013-12-049590-019-0940ND
2013-12-115701-048-12260.920 ppb
2013-12-115701-055-13203.81 ppb
2013-12-115701-805-11474.61 ppb
2013-12-189590-024-1325ND
2014-01-085701-805-11183.45 ppb
2014-01-295701-023-1000ND
2014-02-055701-800-11131.95 ppb
2014-02-055701-801-10350.920 ppb
2014-02-055701-802-11391.29 ppb
2014-02-055701-803-13021.98 ppb
2014-02-055701-804-11152.04 ppb
2014-02-055701-805-11431.94 ppb
2014-02-055701-806-10502.01 ppb
2014-02-055701-807-10221.74 ppb
2014-02-125701-805-11462.15 ppb
2014-02-195701-018-1043ND
2014-03-125701-048-09351.16 ppb
2014-03-125701-055-09504.56 ppb
2014-03-125701-805-11202.34 ppb
2014-03-195701-004-1400ND
2014-03-195701-019-1415ND
2014-04-095701-805-11262.43 ppb
2014-05-075701-800-13072.13 ppb
2014-05-075701-801-13360.930 ppb
2014-05-075701-802-12491.87 ppb
2014-05-075701-803-11462.05 ppb
2014-05-075701-804-11012.25 ppb
2014-05-075701-805-11162.22 ppb
2014-05-075701-806-10382.45 ppb
2014-05-075701-807-10222.09 ppb
2014-05-145701-805-11171.08 ppb
2014-05-229590-018-1002ND
2014-05-305701-058-16002.37 ppb
2014-06-115701-048-10131.05 ppb
2014-06-115701-055-09253.20 ppb
2014-06-115701-805-11493.32 ppb
2014-06-255701-019-0945ND
2014-06-255701-024-1100ND
2014-07-095701-004-0930ND
2014-07-165701-805-10503.00 ppb
2014-07-235701-050-1345ND
2014-08-065701-800-13242.63 ppb
2014-08-065701-801-14100.910 ppb
2014-08-065701-802-13011.93 ppb
2014-08-065701-803-11372.59 ppb
2014-08-065701-804-11082.35 ppb
2014-08-065701-805-11342.67 ppb
2014-08-065701-806-10432.56 ppb
2014-08-065701-807-10182.41 ppb
2014-08-135810-805-11422.30 ppb
2014-08-195701-057-14250.620 ppb
2014-08-275701-018-1345ND
2014-08-275701-036-1038ND
2014-08-275701-057-10450.600 ppb
2014-09-035701-057-1355ND
2014-09-105701-048-14101.24 ppb
2014-09-105701-055-14350.680 ppb
2014-09-105701-057-14310.710 ppb
2014-09-175701-019-1441ND
2014-09-175701-024-1329ND
2014-09-245701-004-1150ND
2014-09-245701-016-1440ND
2014-10-085701-004-1115ND
2014-10-095701-016-1404ND
2014-10-159590-805-10542.70 ppb
2014-11-055701-800-12502.06 ppb
2014-11-055701-801-13250.790 ppb
2014-11-055701-802-11581.09 ppb
2014-11-055701-803-11301.95 ppb
2014-11-055701-804-11002.71 ppb
2014-11-055701-805-11232.35 ppb
2014-11-055701-806-10481.91 ppb
2014-11-055701-807-15071.83 ppb
2014-11-065701-022-1340ND
2014-11-195701-805-11202.84 ppb
2014-11-245701-018-1032ND
2014-12-105701-048-11101.43 ppb
2014-12-105701-055-15303.25 ppb
2014-12-179590-004-1450ND
2014-12-175701-019-0940ND
2014-12-175701-024-1030ND
2015-01-075701-805-11524.17 ppb
2015-01-215701-023-1340ND
2015-02-045701-800-07302.72 ppb
2015-02-045701-801-07300.520 ppb
2015-02-045701-802-07311.13 ppb
2015-02-045701-803-07312.19 ppb
2015-02-045701-804-07313.57 ppb
2015-02-045701-805-07313.29 ppb
2015-02-045701-805-11493.62 ppb
2015-02-045701-806-07312.77 ppb
2015-02-045701-807-07312.59 ppb
2015-02-185701-018-1345ND
2015-03-115701-055-08063.78 ppb
2015-03-185701-024-1050ND
2015-03-185701-805-12003.00 ppb
2015-03-255701-004-1456ND
2015-03-255701-019-15303.81 ppb
2015-04-085701-805-11403.25 ppb
2015-05-065701-800-08293.59 ppb
2015-05-065701-801-08290.950 ppb
2015-05-065701-802-08291.69 ppb
2015-05-065701-803-08293.34 ppb
2015-05-065701-804-08293.51 ppb
2015-05-065701-805-08293.12 ppb
2015-05-065701-806-08293.07 ppb
2015-05-065701-807-08293.37 ppb
2015-06-105701-805-11413.85 ppb
2015-06-175701-004-1024ND
2015-06-175701-024-0930ND
2015-06-175701-055-08394.49 ppb
2015-07-155701-019-1110ND
2015-07-155701-805-13042.76 ppb
2015-07-225701-050-1323ND
2015-08-055701-800-08112.96 ppb
2015-08-055701-801-08112.26 ppb
2015-08-055701-802-08111.24 ppb
2015-08-055701-803-08112.92 ppb
2015-08-055701-804-08113.52 ppb
2015-08-055701-805-08113.72 ppb
2015-08-055701-806-08112.95 ppb
2015-08-055701-807-08112.95 ppb
2015-08-125701-805-13202.98 ppb
2015-08-195701-036-1409ND
2015-09-095701-805-10352.66 ppb
2015-09-235701-004-1438ND
2015-09-235701-019-1015ND
2015-09-235701-024-1330ND
2015-09-235701-055-09454.93 ppb
2015-10-055701-024-1020ND
2015-10-145701-805-11102.53 ppb
2015-11-045701-800-08423.45 ppb
2015-11-045701-801-08420.980 ppb
2015-11-045701-802-08421.97 ppb
2015-11-045701-803-08422.87 ppb
2015-11-045701-804-09053.99 ppb
2015-11-045701-805-09054.07 ppb
2015-11-045701-805-11303.20 ppb
2015-11-045701-806-09053.24 ppb
2015-11-045701-807-09052.09 ppb
2015-12-095701-805-11223.38 ppb
2015-12-175701-004-1108ND
2015-12-175701-024-0947ND
2015-12-239590-022-1040ND
2015-12-299590-016-1150ND
2016-01-135701-805-11122.49 ppb
2016-01-205701-023-1200ND
2016-02-035701-800-08423.35 ppb
2016-02-035701-801-08420.770 ppb
2016-02-035701-802-08421.46 ppb
2016-02-035701-803-08422.55 ppb
2016-02-035701-804-08422.84 ppb
2016-02-035701-805-08422.61 ppb
2016-02-035701-805-11322.71 ppb
2016-02-035701-806-08422.75 ppb
2016-02-035701-807-0842ND
2016-03-095701-805-11023.26 ppb
2016-03-169590-004-1040ND
2016-03-165701-024-1340ND
2016-03-239590-018-1340ND
2016-04-065701-805-11172.73 ppb
2016-05-045701-800-07352.88 ppb
2016-05-045701-801-07350.660 ppb
2016-05-045701-802-07352.70 ppb
2016-05-045701-803-07352.60 ppb
2016-05-045701-804-07352.92 ppb
2016-05-045701-805-07352.70 ppb
2016-05-045701-806-07353.11 ppb
2016-05-045701-807-07352.86 ppb
2016-05-115701-805-12303.08 ppb
2016-06-155701-018-1200ND
2016-06-155701-805-11242.68 ppb
2016-06-225701-004-1330ND
2016-06-225701-024-1130ND
2016-07-135701-805-11533.44 ppb
2016-07-205701-050-1310ND
2016-07-239590-057-10005.30 ppb
2016-07-279590-057-11054.80 ppb
2016-08-035701-800-07533.25 ppb
2016-08-035701-801-07533.21 ppb
2016-08-035701-802-07532.23 ppb
2016-08-035701-803-07532.90 ppb
2016-08-035701-804-07533.37 ppb
2016-08-035701-805-07533.57 ppb
2016-08-035701-805-11303.78 ppb
2016-08-035701-806-07533.31 ppb
2016-08-035701-807-07533.04 ppb
2016-09-145701-805-11243.09 ppb
2016-09-215701-004-1015ND
2016-09-215701-018-1100ND
2016-09-215701-048-08171.09 ppb
2016-10-125701-805-11272.58 ppb
2016-11-095701-800-08073.01 ppb
2016-11-095701-801-08072.80 ppb
2016-11-095701-802-08071.98 ppb
2016-11-095701-803-08072.34 ppb
2016-11-095701-804-07232.71 ppb
2016-11-095701-805-07232.62 ppb
2016-11-095701-806-07232.72 ppb
2016-11-095701-807-07233.22 ppb
2016-11-165701-018-1300ND
2016-11-165701-805-11353.52 ppb
2016-12-145701-004-1305ND
2016-12-145810-805-11046.50 ppb
2016-12-219590-016-1255ND
2016-12-215701-048-06540.890 ppb
2016-12-289590-019-0930ND
2017-01-115701-805-11332.77 ppb
2017-01-255701-023-1145ND
2017-02-085810-800-13338.50 ppb
2017-02-085810-801-14093.90 ppb
2017-02-085810-802-13214.60 ppb
2017-02-085810-803-12458.00 ppb
2017-02-085810-804-112410.00 ppb
2017-02-085810-805-12459.30 ppb
2017-02-085810-806-11598.80 ppb
2017-02-085810-807-11298.50 ppb
2017-02-155701-805-12216.70 ppb
2017-02-225701-018-1310ND
2017-03-089590-019-1430ND
2017-03-155701-004-1330ND
2017-03-155701-019-1445ND
2017-03-155701-048-08490.920 ppb
2017-03-155701-055-08501.55 ppb
2017-03-155701-805-11374.11 ppb
2017-04-055701-805-10500.570 ppb
2017-05-035701-800-11561.69 ppb
2017-05-035701-801-13140.780 ppb
2017-05-035701-802-11441.75 ppb
2017-05-035701-803-11141.59 ppb
2017-05-035701-804-11264.77 ppb
2017-05-035701-805-11394.49 ppb
2017-05-035701-806-11061.72 ppb
2017-05-035701-807-10371.67 ppb
2017-05-105701-805-12444.94 ppb
2017-05-235701-058-12002.89 ppb
2017-05-245701-018-1345ND
2017-06-075701-805-11592.53 ppb
2017-06-145701-048-08110.950 ppb
2017-06-145701-055-08113.34 ppb
2017-06-215701-004-0935ND
2017-06-215701-019-1040ND
2017-06-295701-024-1440ND
2017-07-129590-805-10017.40 ppb
2017-07-265701-050-1300ND
2017-08-095810-800-11452.70 ppb
2017-08-095810-801-12512.60 ppb
2017-08-095810-802-11322.20 ppb
2017-08-095810-803-11004.00 ppb
2017-08-095810-804-11307.50 ppb
2017-08-095810-805-11586.20 ppb
2017-08-095810-806-11103.70 ppb
2017-08-095810-807-10308.00 ppb
2017-08-165701-805-11325.52 ppb
2017-08-235701-004-1245ND
2017-08-235701-018-1020ND
2017-08-235701-036-1115ND
2017-09-115810-048-07321.10 ppb
2017-09-115810-055-12004.90 ppb
2017-09-135701-805-10035.34 ppb
2017-09-149590-058-11001.40 ppb
2017-09-265701-019-1338ND
2017-09-265701-024-1428ND
2017-10-115701-016-1210ND
2017-10-115701-805-10403.28 ppb
2017-10-169590-805-10304.70 ppb
2017-11-085810-800-09094.20 ppb
2017-11-085810-801-0934ND
2017-11-085810-802-10003.70 ppb
2017-11-085810-803-10345.00 ppb
2017-11-085810-804-10286.30 ppb
2017-11-085810-805-10555.40 ppb
2017-11-085810-805-10585.50 ppb
2017-11-085810-806-10004.40 ppb
2017-11-085810-807-09314.80 ppb
2017-11-215701-018-1340ND
2017-12-135701-004-1105ND
2017-12-135701-019-0940ND
2017-12-135701-024-1035ND
2017-12-135701-048-08000.670 ppb
2017-12-135701-055-08002.99 ppb
2017-12-135701-805-11263.39 ppb