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EWG's Tap Water Database — 2021 UPDATE

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Bromoform

Cal-water Service Company-oroville

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

 

137

Samples

0

Samples exceeding legal limit (MCL)

6

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND130ND
2015ND160ND
20160.0285 ppb261ND - 0.740 ppb
20170.180 ppb252ND - 2.30 ppb
20180.0800 ppb252ND - 1.20 ppb
20190.0188 ppb321ND - 0.600 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
2014-01-225701-007-1500ND
2014-01-225701-009-1130ND
2014-03-055701-015-1310ND
2014-04-165701-007-1100ND
2014-04-165701-009-1145ND
2014-05-225701-005-1300ND
2014-06-035701-015-1400ND
2014-07-225701-007-1400ND
2014-07-225701-009-1040ND
2014-09-035701-015-1200ND
2014-10-215701-007-1530ND
2014-10-215701-009-1000ND
2014-12-035701-015-1450ND
2015-01-225701-007-1330ND
2015-01-225701-009-1110ND
2015-02-175701-005-1510ND
2015-03-055701-015-0811ND
2015-04-215701-007-1330ND
2015-04-215701-009-1105ND
2015-06-015701-015-0906ND
2015-07-215701-007-1425ND
2015-07-215701-009-1120ND
2015-09-215810-015-1410ND
2015-10-205701-007-1330ND
2015-10-205701-009-1045ND
2015-12-085810-900-1440ND
2015-12-085810-901-1420ND
2015-12-085810-902-1350ND
2015-12-085810-903-1335ND
2016-01-215701-007-1335ND
2016-01-215701-009-1050ND
2016-02-175701-005-1320ND
2016-03-155701-008-1135ND
2016-03-175701-015-0750ND
2016-03-175701-900-0750ND
2016-03-175701-902-07500.740 ppb
2016-03-175701-903-0750ND
2016-04-195701-007-1330ND
2016-04-195701-009-1050ND
2016-06-085701-015-0902ND
2016-06-085701-900-0902ND
2016-06-085701-902-0902ND
2016-06-085701-903-0902ND
2016-07-195701-007-1530ND
2016-07-195701-009-1135ND
2016-09-065701-900-0834ND
2016-09-065701-901-0834ND
2016-09-065701-902-0834ND
2016-09-065701-903-0834ND
2016-10-255701-007-1645ND
2016-10-255701-009-1440ND
2016-12-085701-900-1042ND
2016-12-085701-901-1043ND
2016-12-085701-902-1042ND
2016-12-085701-903-1041ND
2017-01-245701-007-1530ND
2017-01-245701-009-1120ND
2017-03-075810-900-1030ND
2017-03-075810-901-1120ND
2017-03-075810-902-11552.20 ppb
2017-03-075810-903-10002.30 ppb
2017-04-115701-007-1105ND
2017-04-115701-009-1330ND
2017-05-235701-005-1500ND
2017-06-055701-900-0919ND
2017-06-055701-901-0919ND
2017-06-055701-902-0919ND
2017-06-055701-903-0919ND
2017-07-209590-007-1200ND
2017-07-209590-009-1000ND
2017-09-065810-900-1150ND
2017-09-065810-901-1130ND
2017-09-065810-903-1045ND
2017-09-255810-902-1320ND
2017-10-175701-007-1345ND
2017-10-175701-009-1100ND
2017-12-055701-900-0812ND
2017-12-055701-901-0812ND
2017-12-055701-902-0812ND
2017-12-055701-903-0812ND
2018-02-135701-005-1330ND
2018-02-225701-007-1315ND
2018-02-225701-009-1025ND
2018-03-055701-900-0810ND
2018-03-055701-901-0810ND
2018-03-055701-902-0810ND
2018-03-055701-903-0810ND
2018-04-119590-007-1330ND
2018-04-119590-009-1030ND
2018-06-075701-900-0803ND
2018-06-075701-901-0803ND
2018-06-075701-902-0803ND
2018-06-075701-903-0803ND
2018-07-195701-007-1310ND
2018-07-195701-009-1030ND
2018-09-055701-900-0756ND
2018-09-055701-901-0756ND
2018-09-055701-902-0756ND
2018-09-055701-903-0756ND
2018-10-165810-007-1040ND
2018-10-165810-009-1301ND
2018-12-055701-900-0827ND
2018-12-055701-901-08270.800 ppb
2018-12-055701-902-08271.20 ppb
2018-12-055701-903-0827ND
2019-01-225810-005-1000ND
2019-01-225810-900-1135ND
2019-01-225810-901-1110ND
2019-01-225810-902-1050ND
2019-01-225810-903-1030ND
2019-02-125701-005-1000ND
2019-03-045701-900-0932ND
2019-03-045701-901-0932ND
2019-03-045701-902-09320.600 ppb
2019-03-045701-903-0932ND
2019-03-195701-006-1310ND
2019-03-195701-008-1050ND
2019-03-279590-007-1000ND
2019-03-279590-009-1330ND
2019-04-115810-007-1020ND
2019-04-115810-009-1400ND
2019-06-195701-900-0844ND
2019-06-195701-901-0844ND
2019-06-195701-902-0844ND
2019-06-195701-903-0844ND
2019-07-235701-007-1040ND
2019-07-235701-009-1430ND
2019-09-045701-900-1125ND
2019-09-045701-901-1315ND
2019-09-045701-902-1050ND
2019-09-045701-903-1010ND
2019-10-155701-007-1120ND
2019-10-155701-009-1550ND
2019-12-045701-900-1250ND
2019-12-045701-901-1325ND
2019-12-045701-902-1355ND
2019-12-045701-903-1000ND