EWG's Tap Water Database — 2021 UPDATE



Warren County Socialville PWS

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.





Samples exceeding legal limit (MCL)


Samples exceeding
health guidelines

Testing results - average by year

YearAverage resultSamples takenDetectionsRange of results
20147.60 ppb16161.40 ppb - 15.5 ppb
201513.0 ppb16163.11 ppb - 27.6 ppb
20168.56 ppb16161.03 ppb - 19.3 ppb
20174.58 ppb16160.900 ppb - 14.4 ppb
20183.78 ppb1613ND - 11.8 ppb
20194.56 ppb128ND - 11.8 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
2014-03-04A1401907291.40 ppb
2014-03-04A1401907281.80 ppb
2014-03-04A1401907301.40 ppb
2014-03-04A1401907271.50 ppb
2014-06-02A1401914562.30 ppb
2014-06-02A1401914572.20 ppb
2014-06-02A1401914582.00 ppb
2014-06-02A1401914592.00 ppb
2014-09-0214I0159-0214.7 ppb
2014-09-0214I0159-0314.7 ppb
2014-09-0214I0159-0413.4 ppb
2014-09-0214I0159-0115.5 ppb
2014-12-0214L0236-0112.6 ppb
2014-12-0214L0236-0214.2 ppb
2014-12-0214L0236-0311.1 ppb
2014-12-0214L0236-0410.9 ppb
2015-03-0315C0230-025.04 ppb
2015-03-0315C0230-045.08 ppb
2015-03-0315C0230-035.39 ppb
2015-03-0315C0230-015.49 ppb
2015-06-1615F1138-0112.4 ppb
2015-06-1615F1138-0212.1 ppb
2015-06-1615F1138-0312.5 ppb
2015-06-1615F1138-0412.3 ppb
2015-09-0115I0163-0412.0 ppb
2015-09-0115I0163-033.11 ppb
2015-09-0115I0163-0115.4 ppb
2015-09-0115I0163-0215.9 ppb
2015-12-0115L0137-0125.6 ppb
2015-12-0115L0137-0227.6 ppb
2015-12-0115L0137-0317.2 ppb
2015-12-0115L0137-0420.3 ppb
2016-03-0116C0135-011.67 ppb
2016-03-0116C0135-021.39 ppb
2016-03-0116C0135-031.03 ppb
2016-03-0116C0135-041.06 ppb
2016-06-0216F0298-013.73 ppb
2016-06-0216F0298-043.36 ppb
2016-06-0216F0298-033.42 ppb
2016-06-0216F0298-024.10 ppb
2016-09-0616I0400-0113.9 ppb
2016-09-0616I0400-0219.3 ppb
2016-09-0616I0400-0313.8 ppb
2016-09-0616I0400-0411.3 ppb
2016-12-0616L0459-0414.4 ppb
2016-12-0616L0459-0315.4 ppb
2016-12-0616L0459-0113.2 ppb
2016-12-0616L0459-0216.0 ppb
2017-03-0217C0238-010.900 ppb
2017-03-0217C0238-020.940 ppb
2017-03-0217C0238-031.04 ppb
2017-03-0217C0238-040.910 ppb
2017-06-0117F0083-011.91 ppb
2017-06-0117F0083-032.17 ppb
2017-06-0117F0083-042.03 ppb
2017-06-0217F0083-021.96 ppb
2017-09-0517I0296-0410.7 ppb
2017-09-0517I0296-0314.4 ppb
2017-09-0517I0296-0213.4 ppb
2017-09-0517I0296-0113.2 ppb
2017-12-0517L0355-012.03 ppb
2017-12-0517L0355-024.09 ppb
2017-12-0517L0355-032.06 ppb
2017-12-0517L0355-041.55 ppb
2018-03-0618C0475-041.22 ppb
2018-06-0518F0342-011.55 ppb
2018-06-0518F0342-031.54 ppb
2018-06-0518F0342-041.82 ppb
2018-06-0618F0342-021.78 ppb
2018-09-0418I0163-0211.5 ppb
2018-09-0418I0163-0311.8 ppb
2018-09-0418I0163-0410.5 ppb
2018-09-0418I0163-0111.5 ppb
2018-12-045230290011.80 ppb
2018-12-045230290022.30 ppb
2018-12-045230290031.60 ppb
2018-12-045230290041.50 ppb
2019-06-0452153730042.80 ppb
2019-06-0452153730032.30 ppb
2019-06-0452153730022.20 ppb
2019-06-0452153730012.30 ppb
2019-09-03522226600111.3 ppb
2019-09-03522226600311.8 ppb
2019-09-03522226600511.5 ppb
2019-09-03522226600710.5 ppb