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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

California Water Service - Bear Gulch

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

 

239

Samples

0

Samples exceeding legal limit (MCL)

8

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND360ND
2015ND390ND
20161.41 ppb418ND - 51.2 ppb
2017ND410ND
2018ND390ND
2019ND430ND

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
2014-03-105701-908-1210ND
2014-03-105701-909-1212ND
2014-03-125701-900-1002ND
2014-03-125701-901-0945ND
2014-03-125701-902-1023ND
2014-03-125701-903-1050ND
2014-03-125701-904-1051ND
2014-03-125701-905-0938ND
2014-03-125701-906-0915ND
2014-06-115701-900-1118ND
2014-06-115701-901-1158ND
2014-06-115701-902-1031ND
2014-06-115701-903-1220ND
2014-06-115701-904-0944ND
2014-06-115701-905-1009ND
2014-06-115701-906-1140ND
2014-06-115701-908-1135ND
2014-06-115701-909-1106ND
2014-09-085701-900-1247ND
2014-09-085701-901-1047ND
2014-09-085701-902-1517ND
2014-09-085701-903-1014ND
2014-09-085701-908-1144ND
2014-09-085701-909-1242ND
2014-09-105701-904-1203ND
2014-09-105701-905-1025ND
2014-09-105701-906-1010ND
2014-12-085701-908-1035ND
2014-12-085701-909-1015ND
2014-12-095701-900-1038ND
2014-12-095701-901-0950ND
2014-12-095701-902-1135ND
2014-12-095701-903-0936ND
2014-12-095701-904-1140ND
2014-12-095701-905-1206ND
2014-12-095701-906-1000ND
2015-03-105701-900-0932ND
2015-03-105701-901-0932ND
2015-03-105701-902-0932ND
2015-03-105701-903-0932ND
2015-03-105701-904-0930ND
2015-03-105701-905-0930ND
2015-03-105701-906-0930ND
2015-03-105701-907-0930ND
2015-03-105701-908-0934ND
2015-03-105701-909-0935ND
2015-03-195701-907-0300ND
2015-03-265701-907-1538ND
2015-06-105701-900-0849ND
2015-06-105701-901-0849ND
2015-06-105701-902-0849ND
2015-06-105701-903-0849ND
2015-06-105701-904-0849ND
2015-06-105701-905-0849ND
2015-06-105701-906-0849ND
2015-06-105701-908-0845ND
2015-06-105701-909-0846ND
2015-09-165701-900-0814ND
2015-09-165701-901-0814ND
2015-09-165701-902-0814ND
2015-09-165701-903-0814ND
2015-09-165701-904-0814ND
2015-09-165701-905-0814ND
2015-09-165701-906-0814ND
2015-09-165701-908-0814ND
2015-09-165701-909-0814ND
2015-12-145701-900-0824ND
2015-12-145701-901-0824ND
2015-12-145701-902-0824ND
2015-12-145701-903-0824ND
2015-12-145701-904-0824ND
2015-12-145701-905-0824ND
2015-12-145701-906-0824ND
2015-12-145701-908-0824ND
2015-12-145701-909-0824ND
2016-02-165701-002-1040ND
2016-02-165701-907-1125ND
2016-03-165701-900-0836ND
2016-03-165701-901-083651.2 ppb
2016-03-165701-902-0836ND
2016-03-165701-903-0836ND
2016-03-165701-904-0836ND
2016-03-165701-905-0836ND
2016-03-165701-906-0836ND
2016-03-165701-907-0836ND
2016-03-165701-908-0835ND
2016-03-165701-909-0835ND
2016-04-125810-907-1413ND
2016-06-145701-908-0817ND
2016-06-145701-909-0817ND
2016-06-165701-900-1459ND
2016-06-165701-901-1238ND
2016-06-165701-902-1526ND
2016-06-165701-903-1107ND
2016-06-165701-904-1603ND
2016-06-165701-905-1623ND
2016-06-165701-906-1257ND
2016-06-165701-907-1414ND
2016-09-145701-900-08160.640 ppb
2016-09-145701-901-08160.910 ppb
2016-09-145701-902-08161.31 ppb
2016-09-145701-903-08161.03 ppb
2016-09-145701-904-08160.960 ppb
2016-09-145701-905-08160.690 ppb
2016-09-145701-906-08160.900 ppb
2016-09-145701-908-0816ND
2016-09-145701-909-0816ND
2016-12-145810-900-1345ND
2016-12-145810-901-1218ND
2016-12-145810-902-1402ND
2016-12-145810-903-1313ND
2016-12-145810-904-1259ND
2016-12-145810-905-1151ND
2016-12-145810-906-1207ND
2016-12-145810-908-1109ND
2016-12-145810-909-1153ND
2017-02-155701-002-1248ND
2017-02-155701-907-1301ND
2017-03-135701-900-0819ND
2017-03-135701-901-0819ND
2017-03-135701-902-0819ND
2017-03-135701-903-0819ND
2017-03-135701-904-0819ND
2017-03-135701-905-0819ND
2017-03-135701-906-0819ND
2017-03-135701-907-0819ND
2017-03-135701-908-0819ND
2017-03-135701-909-0819ND
2017-06-165701-900-0807ND
2017-06-165701-901-0807ND
2017-06-165701-902-0807ND
2017-06-165701-903-0807ND
2017-06-165701-904-0807ND
2017-06-165701-905-0807ND
2017-06-165701-906-0807ND
2017-06-165701-907-0807ND
2017-06-165701-908-0807ND
2017-06-165701-909-0807ND
2017-09-115810-900-1330ND
2017-09-115810-901-1037ND
2017-09-115810-902-1215ND
2017-09-115810-903-0951ND
2017-09-115810-904-1434ND
2017-09-115810-905-1518ND
2017-09-115810-906-1050ND
2017-09-115810-908-1202ND
2017-09-115810-909-1301ND
2017-12-125810-900-1324ND
2017-12-125810-901-1112ND
2017-12-125810-902-1302ND
2017-12-125810-903-1051ND
2017-12-125810-904-1242ND
2017-12-125810-905-1217ND
2017-12-125810-906-1125ND
2017-12-125810-907-1332ND
2017-12-125701-908-0849ND
2017-12-125701-909-0849ND
2018-02-055701-002-1210ND
2018-02-055701-907-1215ND
2018-02-225810-907-0930ND
2018-03-145701-900-0839ND
2018-03-145701-901-0839ND
2018-03-145701-902-0839ND
2018-03-145701-903-0839ND
2018-03-145701-904-0839ND
2018-03-145701-905-0839ND
2018-03-145701-906-0839ND
2018-03-145701-908-1327ND
2018-03-145701-909-1255ND
2018-06-115701-900-0857ND
2018-06-115701-901-0857ND
2018-06-115701-902-0857ND
2018-06-115701-903-0857ND
2018-06-115701-904-0857ND
2018-06-115701-905-0857ND
2018-06-115701-906-0857ND
2018-06-115701-908-0857ND
2018-06-115701-909-0857ND
2018-09-135701-900-0653ND
2018-09-135701-901-0654ND
2018-09-135701-902-0653ND
2018-09-135701-903-0653ND
2018-09-135701-904-0650ND
2018-09-135701-905-0650ND
2018-09-135701-906-0650ND
2018-09-175701-908-0859ND
2018-09-175701-909-0900ND
2018-12-105701-900-0924ND
2018-12-105701-901-0924ND
2018-12-105701-902-0924ND
2018-12-105701-903-0924ND
2018-12-105701-904-0924ND
2018-12-105701-905-0924ND
2018-12-105701-906-0924ND
2018-12-105701-908-0924ND
2018-12-105701-909-0924ND
2019-02-205701-002-1328ND
2019-02-205701-907-1331ND
2019-03-135701-900-0832ND
2019-03-135701-901-0832ND
2019-03-135701-902-0832ND
2019-03-135701-903-0832ND
2019-03-135701-904-0832ND
2019-03-135701-905-0832ND
2019-03-135701-906-0832ND
2019-03-135701-908-0832ND
2019-03-135701-909-0832ND
2019-03-185701-907-1051ND
2019-03-279590-907-1445ND
2019-06-105701-900-1037ND
2019-06-105701-901-1037ND
2019-06-105701-902-1037ND
2019-06-105701-903-1037ND
2019-06-105701-904-1037ND
2019-06-105701-905-1037ND
2019-06-105701-906-1037ND
2019-06-105701-908-1059ND
2019-06-105701-909-1037ND
2019-06-185810-910-1201ND
2019-09-095701-900-1234ND
2019-09-095701-901-1059ND
2019-09-095701-902-1300ND
2019-09-095701-903-1024ND
2019-09-095701-904-1410ND
2019-09-095701-905-1320ND
2019-09-095701-906-1122ND
2019-09-095701-910-1004ND
2019-09-105701-908-1148ND
2019-09-105701-909-1116ND
2019-12-095701-900-1153ND
2019-12-095701-901-1110ND
2019-12-095701-902-1219ND
2019-12-095701-903-1318ND
2019-12-095701-904-1230ND
2019-12-095701-905-1243ND
2019-12-095701-906-1102ND
2019-12-095701-908-1032ND
2019-12-095701-909-1048ND
2019-12-095701-910-0936ND