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Bromoform

Public Wholesale WSD 5

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.

 

67

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20100.238 ppb165ND - 0.980 ppb
20111.22 ppb1612ND - 2.50 ppb
20122.82 ppb1613ND - 5.10 ppb
20131.62 ppb138ND - 4.70 ppb
2014ND20ND
20150.133 ppb41ND - 0.530 ppb

ppb = parts per billion.

State and national drinking water standards and health guidelines

Health Guideline 0.5 ppb

The 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.

EPA Maximum Contaminant
Level Goal (MCLG)0 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

All test results

Date Lab ID Result
2010-01-18541106TFND
2010-01-18541107TFND
2010-01-18541108TFND
2010-01-18541109TF0.500 ppb
2010-04-05544206TFND
2010-04-05544205TFND
2010-04-05544204TFND
2010-04-05544203TFND
2010-07-19548494TFND
2010-07-19548493TFND
2010-07-19548492TFND
2010-07-19548484TFND
2010-11-08553805TF0.980 ppb
2010-11-08553804TF0.690 ppb
2010-11-08553802TF0.970 ppb
2010-11-08553803TF0.670 ppb
2011-01-17557425TF1.70 ppb
2011-01-17557424TF1.20 ppb
2011-01-17557423TF0.650 ppb
2011-01-17557422TF0.990 ppb
2011-04-11560141TFND
2011-04-11560142TFND
2011-04-11560143TFND
2011-04-11560144TFND
2011-07-18564576TF1.60 ppb
2011-07-18564579TF1.40 ppb
2011-07-18564577TF1.30 ppb
2011-07-18564578TF1.50 ppb
2011-10-10569779TF2.30 ppb
2011-10-10569780TF2.50 ppb
2011-10-10569777TF2.20 ppb
2011-10-10569778TF2.20 ppb
2012-01-23572797TF4.20 ppb
2012-01-23572796TF4.00 ppb
2012-01-23572795TF1.80 ppb
2012-01-23572794TF4.20 ppb
2012-04-09577280TFND
2012-04-09577281TFND
2012-04-09577282TFND
2012-04-09577283TF0.550 ppb
2012-07-16581872TF4.60 ppb
2012-07-16581873TF4.70 ppb
2012-07-16581874TF4.80 ppb
2012-07-16581875TF5.10 ppb
2012-10-15586694TF3.10 ppb
2012-10-15586692TF2.70 ppb
2012-10-15586691TF2.90 ppb
2012-10-15586693TF2.50 ppb
2013-01-14589445TF4.70 ppb
2013-01-14589446TF3.40 ppb
2013-01-14589444TF2.60 ppb
2013-01-14589443TF4.60 ppb
2013-04-15594678TFND
2013-04-15594679TFND
2013-04-15594680TFND
2013-04-15594681TFND
2013-07-15598790TF1.50 ppb
2013-07-15598789TF1.50 ppb
2013-07-15598788TF1.50 ppb
2013-07-15598787TF1.20 ppb
2013-10-14604431TFND
2014-07-14151391ND
2014-12-29252815ND
2015-01-05258022ND
2015-04-20316601ND
2015-07-20370286ND
2015-10-194218190.530 ppb