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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Crescenta Valley CWD

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

 

218

Samples

0

Samples exceeding legal limit (MCL)

150

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20142.23 ppb2312ND - 5.30 ppb
20152.77 ppb2716ND - 5.90 ppb
20165.30 ppb6449ND - 11.0 ppb
20172.29 ppb2918ND - 6.10 ppb
20187.20 ppb1412ND - 12.0 ppb
20197.29 ppb6143ND - 21.0 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
2014-02-045806-800-10345.20 ppb
2014-02-045806-801-08503.50 ppb
2014-02-045806-802-11503.30 ppb
2014-02-045806-803-10204.70 ppb
2014-05-065806-008-11474.50 ppb
2014-05-065806-801-11203.60 ppb
2014-05-065806-802-10172.70 ppb
2014-05-065806-803-12003.30 ppb
2014-08-055806-001-1130ND
2014-08-055806-002-1056ND
2014-08-055806-005-1135ND
2014-08-055806-006-1320ND
2014-08-055806-007-1030ND
2014-08-055806-009-1030ND
2014-08-055806-010-1340ND
2014-08-055806-011-0950ND
2014-08-055806-012-1245ND
2014-08-055806-013-1156ND
2014-08-055806-800-10145.30 ppb
2014-08-055806-801-09375.10 ppb
2014-08-055806-802-11524.90 ppb
2014-08-055806-803-11205.20 ppb
2014-09-165806-008-0908ND
2015-02-035806-800-08494.40 ppb
2015-02-035806-801-08034.30 ppb
2015-02-035806-802-09103.70 ppb
2015-02-035806-803-08584.50 ppb
2015-05-055806-001-1120ND
2015-05-055806-002-1157ND
2015-05-055806-005-1215ND
2015-05-055806-006-1302ND
2015-05-055806-007-1128ND
2015-05-055806-008-1243ND
2015-05-055806-009-1028ND
2015-05-055806-010-1319ND
2015-05-055806-011-1101ND
2015-05-055806-012-1318ND
2015-05-055806-013-1255ND
2015-05-055806-800-12055.90 ppb
2015-05-055806-801-08575.60 ppb
2015-05-055806-802-10055.00 ppb
2015-05-055806-803-11555.50 ppb
2015-08-045806-800-10175.40 ppb
2015-08-045806-801-11205.50 ppb
2015-08-045806-802-11102.60 ppb
2015-08-045806-803-10025.80 ppb
2015-11-035806-800-10104.30 ppb
2015-11-035806-801-10554.30 ppb
2015-11-035806-802-10013.80 ppb
2015-11-035806-803-10284.30 ppb
2016-02-025806-800-10553.80 ppb
2016-02-025806-801-10154.40 ppb
2016-02-025806-802-10403.10 ppb
2016-02-025806-803-10403.70 ppb
2016-02-115806-027-0940ND
2016-05-035806-001-10481.90 ppb
2016-05-035806-002-1225ND
2016-05-035806-005-1210ND
2016-05-035806-006-1323ND
2016-05-035806-007-1110ND
2016-05-035806-008-1300ND
2016-05-035806-009-1101ND
2016-05-035806-010-1301ND
2016-05-035806-011-1150ND
2016-05-035806-013-1240ND
2016-05-035806-027-1215ND
2016-05-045806-027-1302ND
2016-05-045806-800-10485.00 ppb
2016-05-045806-801-11054.60 ppb
2016-05-045806-802-10223.50 ppb
2016-05-045806-803-10335.70 ppb
2016-06-075806-012-1110ND
2016-08-025806-027-0858ND
2016-08-025806-800-12109.50 ppb
2016-08-025806-801-12307.90 ppb
2016-08-025806-802-12406.60 ppb
2016-08-025806-803-11587.70 ppb
2016-08-155806-800-09389.10 ppb
2016-08-155806-801-10008.50 ppb
2016-08-155806-802-09546.60 ppb
2016-08-155806-803-09258.60 ppb
2016-09-135806-800-09498.40 ppb
2016-09-135806-801-10058.50 ppb
2016-09-135806-802-10155.70 ppb
2016-09-135806-803-09378.90 ppb
2016-09-205806-800-09009.30 ppb
2016-09-205806-801-09187.90 ppb
2016-09-205806-802-09306.40 ppb
2016-09-205806-803-08497.20 ppb
2016-09-275806-800-10039.80 ppb
2016-09-275806-801-102110.00 ppb
2016-09-275806-802-10406.90 ppb
2016-09-275806-803-09467.90 ppb
2016-10-045806-800-094211.0 ppb
2016-10-045806-801-10288.80 ppb
2016-10-045806-802-11405.50 ppb
2016-10-045806-803-092511.0 ppb
2016-10-115806-800-09149.20 ppb
2016-10-115806-801-09276.80 ppb
2016-10-115806-802-10345.40 ppb
2016-10-115806-803-09018.40 ppb
2016-10-185806-800-09406.70 ppb
2016-10-185806-801-10275.80 ppb
2016-10-185806-802-10085.20 ppb
2016-10-185806-803-09215.90 ppb
2016-10-255806-800-094110.00 ppb
2016-10-255806-801-10008.40 ppb
2016-10-255806-802-10158.10 ppb
2016-10-255806-803-09248.00 ppb
2016-11-085806-027-1120ND
2016-11-085806-800-09365.20 ppb
2016-11-085806-801-09154.20 ppb
2016-11-085806-802-09233.90 ppb
2016-11-085806-803-09514.60 ppb
2017-02-075806-800-10374.10 ppb
2017-02-075806-801-10505.70 ppb
2017-02-075806-802-10266.10 ppb
2017-02-075806-803-10204.80 ppb
2017-02-215806-001-11250.750 ppb
2017-02-215806-002-1125ND
2017-02-215806-005-1100ND
2017-02-215806-006-13080.700 ppb
2017-02-215806-007-1030ND
2017-02-215806-009-1013ND
2017-02-215806-010-1250ND
2017-02-215806-011-1145ND
2017-02-215806-012-1245ND
2017-02-215806-013-0941ND
2017-02-215806-027-0914ND
2017-04-245806-006-1333ND
2017-05-025806-800-09053.40 ppb
2017-05-025806-801-08512.60 ppb
2017-05-025806-802-12302.60 ppb
2017-05-025806-803-09202.90 ppb
2017-07-265806-008-0800ND
2017-08-015806-800-10003.30 ppb
2017-08-015806-801-09402.50 ppb
2017-08-015806-802-11513.00 ppb
2017-08-015806-803-10152.90 ppb
2017-11-075806-800-10005.70 ppb
2017-11-075806-801-10355.00 ppb
2017-11-075806-802-11435.40 ppb
2017-11-075806-803-09405.00 ppb
2018-02-065806-010-1248ND
2018-02-065806-800-10159.40 ppb
2018-02-065806-801-10398.40 ppb
2018-02-065806-802-094112.0 ppb
2018-02-065806-803-10008.80 ppb
2018-05-015806-008-1130ND
2018-05-025806-800-09507.00 ppb
2018-05-025806-801-10255.20 ppb
2018-05-025806-802-10474.60 ppb
2018-05-025806-803-09306.00 ppb
2018-11-135806-800-10409.90 ppb
2018-11-135806-801-09409.60 ppb
2018-11-135806-802-101110.00 ppb
2018-11-135806-803-12309.90 ppb
2019-01-155806-800-10157.80 ppb
2019-01-155806-801-09124.50 ppb
2019-01-155806-802-09253.90 ppb
2019-01-155806-803-10006.90 ppb
2019-02-125806-001-1021ND
2019-02-125806-002-0950ND
2019-02-125806-005-1015ND
2019-02-125806-007-1005ND
2019-02-125806-008-1150ND
2019-02-125806-009-0854ND
2019-02-125806-010-1215ND
2019-02-125806-011-0841ND
2019-02-125806-012-1225ND
2019-02-125806-013-1130ND
2019-02-125806-027-1205ND
2019-03-055806-800-11356.70 ppb
2019-03-055806-801-10506.40 ppb
2019-03-055806-803-11506.10 ppb
2019-04-025806-800-11009.20 ppb
2019-04-025806-801-09407.10 ppb
2019-04-025806-802-10034.60 ppb
2019-04-025806-803-10408.20 ppb
2019-05-075806-800-104511.0 ppb
2019-05-075806-801-11057.60 ppb
2019-05-075806-802-11466.30 ppb
2019-05-075806-803-10059.10 ppb
2019-06-045806-800-101017.0 ppb
2019-06-045806-801-103521.0 ppb
2019-06-045806-802-112815.0 ppb
2019-06-045806-803-095020.0 ppb
2019-06-255806-028-0958ND
2019-07-025806-028-1225ND
2019-07-025806-800-093021.0 ppb
2019-07-025806-801-101511.0 ppb
2019-07-025806-802-10009.80 ppb
2019-07-025806-803-094516.0 ppb
2019-08-055806-800-12586.70 ppb
2019-08-055806-801-12255.40 ppb
2019-08-055806-802-12375.70 ppb
2019-08-055806-803-13156.30 ppb
2019-08-065806-028-1001ND
2019-09-035806-028-1240ND
2019-09-175806-800-112011.0 ppb
2019-09-175806-801-09308.50 ppb
2019-09-175806-802-10088.10 ppb
2019-09-175806-803-105711.0 ppb
2019-10-015806-028-1123ND
2019-10-155806-800-10368.20 ppb
2019-10-155806-801-10306.80 ppb
2019-10-155806-802-10207.00 ppb
2019-10-155806-803-11097.60 ppb
2019-11-045806-028-1227ND
2019-11-045806-800-100014.0 ppb
2019-11-045806-801-091513.0 ppb
2019-11-045806-802-131415.0 ppb
2019-11-045806-803-101514.0 ppb
2019-12-035806-028-1154ND
2019-12-175806-800-102716.0 ppb
2019-12-175806-801-094015.0 ppb
2019-12-175806-802-105214.0 ppb
2019-12-175806-803-100515.0 ppb