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EWG's Tap Water Database — 2019 UPDATE

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Bromate

Clarksville Waterworks

Bromate is a carcinogenic disinfection byproduct formed when source waters containing bromide are treated with ozonation or sodium hypochlorite. Studies of laboratory animals show that bromate damages DNA and causes cancer in multiple organs. Click here to read more about disinfection byproducts.

 

72

Samples

1

Samples exceeding legal limit (MCL)

31

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20125.73 ppb129ND - 15.0 ppb
20132.18 ppb126ND - 6.60 ppb
20141.000 ppb124ND - 4.00 ppb
20152.28 ppb126ND - 6.70 ppb
20160.442 ppb122ND - 3.20 ppb
20171.50 ppb124ND - 5.60 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for bromate was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer.

EPA Maximum Contaminant
Level (MCL) 10 ppb

The legal limit for bromate, established in 1998, was based on analytical detection limits at the time that the standard was set. This limit may not fully protect against the risk of cancer due to bromate exposure.

ppb = parts per billion

All test results

Date Lab ID Result
2012-01-04120060031ND
2012-02-01120340006ND
2012-03-06120680017ND
2012-04-031209600443.20 ppb
2012-05-021212400483.30 ppb
2012-06-051215900487.30 ppb
2012-07-0312187002510.00 ppb
2012-08-011221500469.50 ppb
2012-09-0412250001315.0 ppb
2012-10-031227800359.80 ppb
2012-11-051231200107.70 ppb
2012-12-041234000072.90 ppb
2013-01-03130040015ND
2013-02-05130380007ND
2013-03-04130660020ND
2013-04-01130940056ND
2013-05-071312800052.10 ppb
2013-06-04131570023ND
2013-07-01131840029ND
2013-08-051322000136.30 ppb
2013-09-041324800234.60 ppb
2013-10-011327700084.30 ppb
2013-11-041331000476.60 ppb
2013-12-021333800392.30 ppb
2014-01-09140090023ND
2014-02-12140440025ND
2014-03-10140720037ND
2014-04-02140920015ND
2014-05-051412800342.60 ppb
2014-06-03141560023ND
2014-07-01141840023ND
2014-08-05142190061ND
2014-09-041424700192.40 ppb
2014-10-01Y1427500084.00 ppb
2014-11-03Y1431000433.00 ppb
2014-12-02Y143380051ND
2015-01-05Y150080042ND
2015-02-02Y150370013ND
2015-03-03Y150630014ND
2015-04-01Y150920020ND
2015-05-05Y151270015ND
2015-06-02Y1515500372.40 ppb
2015-07-01Y1518300082.70 ppb
2015-08-05Y1521800626.20 ppb
2015-09-02Y1524600056.70 ppb
2015-10-05Y1528200445.10 ppb
2015-11-02Y1531000264.20 ppb
2015-12-01Y153370053ND
2016-01-05Y160080075ND
2016-02-01Y160350019ND
2016-03-02Y160630015ND
2016-04-06Y160980035ND
2016-05-02Y161260012ND
2016-06-01Y161540021ND
2016-07-06Y1618900302.10 ppb
2016-08-01Y162210057ND
2016-09-07Y1625200033.20 ppb
2016-10-04Y162800021ND
2016-11-01Y163130001ND
2016-12-05Y163420045ND
2017-01-04Y1700500385.60 ppb
2017-02-01Y1703400154.90 ppb
2017-03-01Y1706100274.30 ppb
2017-04-03Y170960046ND
2017-05-01Y171240044ND
2017-06-05Y171590145ND
2017-07-03Y1718700793.20 ppb
2017-08-01Y172150056ND
2017-09-05Y172500034ND
2017-10-04Y172780042ND
2017-11-01Y173060028ND
2017-12-05Y173410020ND