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EWG's Tap Water Database — 2021 UPDATE

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Naphthalene

City of Humble

Naphthalene is a polycyclic aromatic hydrocarbon, or PAH, released from combustion of fossil fuels and waste incinerators, and also used as a moth repellent. PAHs increase the risk of cancer; damage the immune, nervous and reproductive systems; and can harm developing fetuses.

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51

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND40ND
2015ND100ND
2016ND90ND
2017ND90ND
2018ND100ND
2019ND90ND

ppb = parts per billion

All test results

Date Lab ID Result
2014-02-11AC42294ND
2014-02-11AC42297ND
2014-02-11AC42295ND
2014-02-11AC42298ND
2015-01-20AC76800ND
2015-01-20AC76798ND
2015-01-20AC76780ND
2015-01-20AC76784ND
2015-01-20AC76796ND
2015-01-20AC76874ND
2015-01-20AC76871ND
2015-01-20AC76877ND
2015-01-20AC76875ND
2015-01-20AC76873ND
2016-01-21AD19416ND
2016-01-21AD19309ND
2016-01-21AD19317ND
2016-01-21AD19315ND
2016-01-21AD19307ND
2016-01-21AD19313ND
2016-01-21AD19421ND
2016-01-21AD19420ND
2016-01-21AD19415ND
2017-01-05AD63381ND
2017-01-05AD63384ND
2017-01-05AD63383ND
2017-01-05AD63231ND
2017-01-05AD63233ND
2017-01-05AD63235ND
2017-01-05AD63263ND
2017-04-21AD80683ND
2017-04-21AD80807ND
2018-01-19AE09539ND
2018-01-19AE09595ND
2018-01-19AE09579ND
2018-01-19AE09688ND
2018-01-19AE09689ND
2018-01-19AE09690ND
2018-04-03AE21101ND
2018-04-03AE21103ND
2018-04-03AE21021ND
2018-04-03AE21019ND
2019-01-15AE49930ND
2019-01-15AE49926ND
2019-01-15AE49927ND
2019-01-15AE49877ND
2019-01-15AE49873ND
2019-01-15AE49879ND
2019-01-15AE49853ND
2019-01-15AE49863ND
2019-08-16AE79410ND