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EWG's Tap Water Database — 2019 UPDATE

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Bromoform

California Water Service Co-leona Valley

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.

 

195

Samples

0

Samples exceeding legal limit (MCL)

162

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201212.9 ppb2315ND - 43.1 ppb
201312.4 ppb2114ND - 31.4 ppb
201411.9 ppb3022ND - 24.6 ppb
201519.2 ppb4137ND - 34.5 ppb
201618.4 ppb4038ND - 49.2 ppb
20175.41 ppb4036ND - 19.0 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
2012-01-115701-005-14009.60 ppb
2012-01-245701-008-125014.5 ppb
2012-02-085701-005-131533.3 ppb
2012-02-285701-001-1410ND
2012-02-285701-006-1415ND
2012-03-125701-005-092817.4 ppb
2012-03-225701-005-140520.3 ppb
2012-04-175701-005-132217.6 ppb
2012-05-085701-005-140514.9 ppb
2012-05-235701-001-1215ND
2012-05-235701-006-1230ND
2012-06-125701-005-144014.8 ppb
2012-07-175701-005-09307.12 ppb
2012-08-145701-005-125614.1 ppb
2012-08-155701-001-1136ND
2012-08-155701-006-1144ND
2012-08-155701-008-112811.6 ppb
2012-09-115701-005-131315.7 ppb
2012-10-095701-005-125143.1 ppb
2012-11-195701-001-1217ND
2012-11-195701-005-114434.8 ppb
2012-11-195701-006-1210ND
2012-12-115701-005-122626.9 ppb
2013-01-085701-005-124618.0 ppb
2013-01-225701-008-113514.4 ppb
2013-02-125701-001-1100ND
2013-02-125701-005-133924.7 ppb
2013-02-125701-006-1115ND
2013-04-165701-005-150112.5 ppb
2013-05-145701-005-130510.2 ppb
2013-05-215701-001-1447ND
2013-06-185701-005-101012.3 ppb
2013-07-115701-005-133814.9 ppb
2013-08-155701-005-094116.9 ppb
2013-08-265701-001-1220ND
2013-08-265701-006-1213ND
2013-08-265701-008-120220.8 ppb
2013-09-105701-005-124830.2 ppb
2013-09-185701-005-104631.4 ppb
2013-10-085701-005-103423.5 ppb
2013-11-125701-005-133812.7 ppb
2013-11-195701-001-1045ND
2013-11-195701-006-1056ND
2013-12-105701-005-103818.4 ppb
2014-01-075701-005-102717.7 ppb
2014-01-215701-008-112910.5 ppb
2014-02-115701-005-101718.1 ppb
2014-02-185701-001-1113ND
2014-02-185701-006-1123ND
2014-03-045701-005-145413.9 ppb
2014-04-085701-005-12598.12 ppb
2014-05-135701-005-11526.07 ppb
2014-05-275701-001-1212ND
2014-05-275701-006-1215ND
2014-06-105701-005-11009.94 ppb
2014-07-295701-005-123018.8 ppb
2014-08-125701-005-100218.4 ppb
2014-08-255701-001-1040ND
2014-08-255701-006-1055ND
2014-08-255701-008-102522.6 ppb
2014-09-095701-005-154017.9 ppb
2014-09-095701-800-145723.0 ppb
2014-09-095701-801-145023.9 ppb
2014-10-145701-005-144514.2 ppb
2014-10-145701-800-140216.3 ppb
2014-10-145701-801-135320.0 ppb
2014-11-185701-001-1124ND
2014-11-185701-006-1130ND
2014-11-255701-005-15559.84 ppb
2014-11-255701-800-133824.6 ppb
2014-11-255701-801-132620.4 ppb
2014-12-165701-005-125014.1 ppb
2014-12-165701-800-121914.9 ppb
2014-12-165701-801-122713.4 ppb
2015-01-135701-005-113223.7 ppb
2015-01-135701-800-110615.5 ppb
2015-01-135701-801-105813.8 ppb
2015-01-205701-008-110814.6 ppb
2015-02-105701-005-083010.4 ppb
2015-02-105701-800-082922.2 ppb
2015-02-105701-801-082914.2 ppb
2015-02-175701-001-1116ND
2015-02-175701-006-1128ND
2015-03-105701-005-09257.65 ppb
2015-03-105701-800-092711.6 ppb
2015-03-105701-801-092810.5 ppb
2015-04-075701-005-084928.3 ppb
2015-04-075701-800-084823.3 ppb
2015-04-075701-801-084825.2 ppb
2015-05-135701-005-093317.3 ppb
2015-05-135701-800-090917.5 ppb
2015-05-135701-801-093118.2 ppb
2015-05-195701-001-1028ND
2015-05-195701-006-1021ND
2015-06-095701-005-102223.7 ppb
2015-06-095701-800-095323.2 ppb
2015-06-095701-801-100823.3 ppb
2015-07-145701-005-085025.1 ppb
2015-07-145701-800-084929.4 ppb
2015-07-145701-801-085026.5 ppb
2015-08-185701-005-083626.0 ppb
2015-08-185701-008-105524.7 ppb
2015-08-185701-800-083432.5 ppb
2015-08-185701-801-083730.2 ppb
2015-09-155701-005-084328.6 ppb
2015-09-155701-800-084134.5 ppb
2015-09-155701-801-084229.0 ppb
2015-10-135701-005-101625.2 ppb
2015-10-135701-800-101425.6 ppb
2015-10-135701-801-101525.1 ppb
2015-11-095810-800-133821.0 ppb
2015-11-095810-801-132817.0 ppb
2015-12-155701-005-080019.0 ppb
2015-12-155701-800-075911.6 ppb
2015-12-155701-801-075911.4 ppb
2016-01-065701-005-091018.8 ppb
2016-01-065701-800-09119.03 ppb
2016-01-065701-801-091114.1 ppb
2016-01-195701-008-150010.5 ppb
2016-02-095701-005-090522.5 ppb
2016-02-095701-800-090515.6 ppb
2016-02-095701-801-090514.6 ppb
2016-03-085701-005-091113.3 ppb
2016-03-085701-800-091012.1 ppb
2016-03-085701-801-091111.5 ppb
2016-04-125701-005-08586.48 ppb
2016-04-125701-800-085715.6 ppb
2016-04-125701-801-085715.7 ppb
2016-05-105701-005-091616.1 ppb
2016-05-105810-800-110617.0 ppb
2016-05-105810-801-105619.0 ppb
2016-05-245701-001-1244ND
2016-05-245701-006-1238ND
2016-06-145701-005-081915.8 ppb
2016-06-145701-800-081824.1 ppb
2016-06-145701-801-081928.1 ppb
2016-07-125701-005-082713.0 ppb
2016-07-125701-800-082527.8 ppb
2016-07-125701-801-082629.7 ppb
2016-08-039590-008-104515.0 ppb
2016-08-095701-005-093711.6 ppb
2016-08-095701-800-093820.3 ppb
2016-08-095701-801-093914.3 ppb
2016-09-135701-005-08379.84 ppb
2016-09-135701-800-083511.0 ppb
2016-09-135701-801-08365.58 ppb
2016-10-185701-005-093637.9 ppb
2016-10-185701-800-093528.1 ppb
2016-10-185701-801-093625.4 ppb
2016-11-155701-005-084849.2 ppb
2016-11-155701-800-084833.6 ppb
2016-11-155701-801-084936.3 ppb
2016-12-135810-005-111327.0 ppb
2016-12-135810-800-120022.0 ppb
2016-12-135810-801-114018.0 ppb
2017-01-175810-005-125819.0 ppb
2017-01-175810-800-135218.0 ppb
2017-01-175810-801-133718.0 ppb
2017-01-245701-008-150619.0 ppb
2017-02-145701-005-09451.94 ppb
2017-02-145701-800-09429.44 ppb
2017-02-145701-801-09439.88 ppb
2017-03-145810-005-1005ND
2017-03-145701-800-08272.20 ppb
2017-03-145701-801-08282.97 ppb
2017-04-035701-005-08171.11 ppb
2017-04-035701-800-081711.4 ppb
2017-04-035701-801-08184.45 ppb
2017-05-025701-001-1245ND
2017-05-025701-006-1241ND
2017-05-095701-005-09550.950 ppb
2017-05-095701-800-09536.05 ppb
2017-05-095701-801-09542.82 ppb
2017-06-135810-005-12464.70 ppb
2017-06-135810-800-11575.40 ppb
2017-06-135810-801-12105.00 ppb
2017-07-115810-005-1024ND
2017-07-115810-800-11432.10 ppb
2017-07-115810-801-09561.70 ppb
2017-08-085810-005-10252.20 ppb
2017-08-085810-800-11185.50 ppb
2017-08-085810-801-10583.30 ppb
2017-08-225701-008-15251.73 ppb
2017-09-125810-005-14522.30 ppb
2017-09-125810-800-14113.10 ppb
2017-09-125810-801-13533.50 ppb
2017-10-105810-005-15004.30 ppb
2017-10-105810-800-13314.80 ppb
2017-10-105810-801-13175.10 ppb
2017-11-135810-005-13036.80 ppb
2017-11-135810-800-13589.90 ppb
2017-11-135810-801-14198.90 ppb
2017-12-125701-005-08502.75 ppb
2017-12-125701-800-08503.11 ppb
2017-12-125701-801-08502.90 ppb