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EWG's Tap Water Database — 2019 UPDATE

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Bromodichloromethane

City of Hollister

Bromodichloromethane, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromodichloromethane and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

73

Samples

0

Samples exceeding legal limit (MCL)

52

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20134.78 ppb443.68 ppb - 6.83 ppb
20141.97 ppb167ND - 22.5 ppb
20153.26 ppb16161.88 ppb - 4.95 ppb
20162.06 ppb2113ND - 5.63 ppb
20174.09 ppb1612ND - 11.4 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.06 ppb

The EWG Health Guideline of 0.06 ppb for bromodichloromethane 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
2013-12-111610-801-15356.83 ppb
2013-12-111610-803-14553.68 ppb
2013-12-111610-802-15103.69 ppb
2013-12-111610-804-16104.91 ppb
2014-03-241610-804-16502.12 ppb
2014-03-241610-802-16150.640 ppb
2014-03-241610-803-15551.26 ppb
2014-03-241610-801-171022.5 ppb
2014-06-061610-802-15200.590 ppb
2014-06-061610-803-1540ND
2014-06-061610-804-1458ND
2014-06-061610-801-1445ND
2014-10-091610-801-1150ND
2014-10-091610-802-1100ND
2014-10-091610-803-1130ND
2014-10-091610-804-1205ND
2014-12-181610-802-1255ND
2014-12-181610-803-1310ND
2014-12-181610-804-12202.11 ppb
2014-12-181610-801-12352.26 ppb
2015-04-211610-803-13282.15 ppb
2015-04-211610-804-13414.15 ppb
2015-04-211610-801-13503.49 ppb
2015-04-211610-802-13212.21 ppb
2015-07-091610-804-09544.30 ppb
2015-07-091610-802-08434.95 ppb
2015-07-091610-803-09034.40 ppb
2015-07-091610-801-10084.29 ppb
2015-09-161610-804-14223.22 ppb
2015-09-161610-801-14402.36 ppb
2015-09-161610-803-13591.88 ppb
2015-09-161610-802-13441.96 ppb
2015-11-121610-804-08583.81 ppb
2015-11-121610-803-09322.86 ppb
2015-11-121610-801-08403.47 ppb
2015-11-121610-802-09202.66 ppb
2016-03-031610-801-09135.26 ppb
2016-03-031610-802-08172.97 ppb
2016-03-031610-804-08565.63 ppb
2016-03-031610-803-08293.80 ppb
2016-06-141610-801-1442ND
2016-06-141610-802-1428ND
2016-06-141610-803-1421ND
2016-06-141610-804-1523ND
2016-06-291610-804-11232.97 ppb
2016-07-071610-804-12373.07 ppb
2016-07-141610-804-1245ND
2016-07-211610-804-1015ND
2016-08-041610-804-1320ND
2016-09-221610-804-12052.24 ppb
2016-09-221610-801-11552.22 ppb
2016-09-221610-802-11102.48 ppb
2016-09-221610-803-11002.28 ppb
2016-12-141610-803-12373.60 ppb
2016-12-141610-802-12513.39 ppb
2016-12-141610-801-13093.25 ppb
2016-12-141610-804-1316ND
2017-03-011610-803-12093.57 ppb
2017-03-011610-801-11504.70 ppb
2017-03-011610-802-12023.48 ppb
2017-03-011610-804-11414.97 ppb
2017-06-011610-801-1245ND
2017-06-011610-802-11593.56 ppb
2017-06-011610-803-12101.79 ppb
2017-06-011610-804-1226ND
2017-09-071610-804-1142ND
2017-09-071610-801-1148ND
2017-09-071610-802-12023.00 ppb
2017-09-071610-803-12084.73 ppb
2017-12-071610-801-091411.4 ppb
2017-12-071610-804-09059.74 ppb
2017-12-071610-802-09346.96 ppb
2017-12-071610-803-09267.60 ppb