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EWG's Tap Water Database — 2019 UPDATE

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Naphthalene

City of Houston

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.

 

347

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012ND600ND
2013ND350ND
2014ND390ND
2015ND750ND
2016ND690ND
2017ND690ND

ppb = parts per billion

All test results

Date Lab ID Result
2012-01-31AB79849ND
2012-01-31AB79852ND
2012-01-31AB79850ND
2012-01-31AB79847ND
2012-01-31AB79851ND
2012-02-01AB79844ND
2012-02-01AB79843ND
2012-02-01AB79846ND
2012-02-01AB79845ND
2012-04-10AB86429ND
2012-04-10AB86427ND
2012-04-10AB86430ND
2012-04-10AB86428ND
2012-04-10AB86431ND
2012-04-10AB86410ND
2012-04-10AB86406ND
2012-05-23AB90945ND
2012-05-23AB90946ND
2012-05-23AB90939ND
2012-05-23AB90943ND
2012-05-23AB90942ND
2012-05-23AB90921ND
2012-05-23AB90927ND
2012-05-23AB90925ND
2012-05-23AB90923ND
2012-05-23AB90944ND
2012-06-11AB92217ND
2012-06-12AB92383ND
2012-06-12AB92386ND
2012-06-12AB92384ND
2012-07-24AB96072ND
2012-07-24AB96069ND
2012-07-24AB96067ND
2012-07-24AB96071ND
2012-07-24AB96070ND
2012-07-24AB96066ND
2012-07-24AB96068ND
2012-07-24AB96065ND
2012-07-24AB96062ND
2012-07-24AB96064ND
2012-08-10AB97995ND
2012-08-10AB97985ND
2012-08-10AB97987ND
2012-08-10AB97989ND
2012-08-10AB97997ND
2012-08-27AB99665ND
2012-09-19AC01320ND
2012-09-19AC01318ND
2012-09-20AC01557ND
2012-09-20AC01569ND
2012-11-08AC04926ND
2012-11-08AC04924ND
2012-11-08AC04928ND
2012-11-08AC04925ND
2012-11-19AC05465ND
2012-11-19AC05463ND
2012-11-19AC05461ND
2012-11-19AC05464ND
2012-11-19AC05462ND
2012-11-19AC05439ND
2013-02-25AC11627ND
2013-02-25AC11624ND
2013-02-25AC11630ND
2013-02-25AC11628ND
2013-02-25AC11629ND
2013-02-26AC11849ND
2013-02-26AC11755ND
2013-03-11AC12965ND
2013-03-11AC12968ND
2013-03-11AC12966ND
2013-03-11AC12969ND
2013-06-12AC22141ND
2013-06-12AC22140ND
2013-06-12AC22138ND
2013-06-13AC22146ND
2013-06-13AC22139ND
2013-08-08AC27249ND
2013-08-08AC27277ND
2013-08-08AC27276ND
2013-08-08AC27278ND
2013-08-08AC27274ND
2013-08-08AC27275ND
2013-08-08AC27265ND
2013-08-08AC27243ND
2013-08-08AC27259ND
2013-08-08AC27253ND
2013-08-08AC27263ND
2013-08-08AC27257ND
2013-08-08AC27261ND
2013-08-08AC27255ND
2013-09-25AC31364ND
2013-10-24AC33318ND
2013-10-29AC33630ND
2013-12-16AC37695ND
2013-12-17AC37823ND
2014-02-03AC41128ND
2014-03-14AC47183ND
2014-03-14AC47184ND
2014-03-14AC47185ND
2014-04-16AC50928ND
2014-04-16AC50929ND
2014-04-16AC50842ND
2014-04-16AC50844ND
2014-04-17AC51090ND
2014-04-17AC51078ND
2014-04-17AC51084ND
2014-04-17AC51082ND
2014-04-17AC51177ND
2014-06-03AC55801ND
2014-06-03AC55831ND
2014-06-03AC55826ND
2014-07-15AC59698ND
2014-07-15AC59690ND
2014-07-15AC59692ND
2014-07-15AC59694ND
2014-07-15AC59688ND
2014-07-15AC59733ND
2014-07-15AC59729ND
2014-07-16AC59835ND
2014-07-16AC59831ND
2014-07-16AC59839ND
2014-07-16AC59849ND
2014-07-16AC59837ND
2014-07-16AC59845ND
2014-10-08AC69209ND
2014-10-08AC69250ND
2014-10-09AC69350ND
2014-10-09AC69348ND
2014-12-09AC74196ND
2014-12-09AC74204ND
2014-12-18AC75459ND
2014-12-18AC75455ND
2014-12-18AC75488ND
2014-12-18AC75489ND
2015-03-04AC82952ND
2015-03-04AC83061ND
2015-03-04AC83059ND
2015-03-05AC82914ND
2015-03-05AC83064ND
2015-03-05AC83065ND
2015-03-24AC85944ND
2015-03-24AC85888ND
2015-06-04AC94641ND
2015-06-04AC94645ND
2015-06-04AC94639ND
2015-06-04AC94643ND
2015-06-04AC94707ND
2015-06-04AC94705ND
2015-06-04AC94710ND
2015-06-04AC94709ND
2015-06-04AC94647ND
2015-06-04AC94706ND
2015-06-04AC94708ND
2015-07-21AD00437ND
2015-07-21AD00441ND
2015-07-21AD00429ND
2015-07-21AD00435ND
2015-07-21AD00443ND
2015-07-21AD00433ND
2015-07-21AD00405ND
2015-07-21AD00407ND
2015-07-22AD00630ND
2015-07-22AD00628ND
2015-07-22AD00632ND
2015-07-22AD00626ND
2015-07-22AD00624ND
2015-07-22AD00638ND
2015-07-22AD00679ND
2015-07-22AD00678ND
2015-09-17AD07597ND
2015-09-17AD07649ND
2015-09-17AD07648ND
2015-09-17AD07599ND
2015-10-22AD11558ND
2015-10-22AD11536ND
2015-10-22AD11542ND
2015-10-22AD11532ND
2015-10-22AD11548ND
2015-10-22AD11550ND
2015-10-22AD11601ND
2015-10-22AD11600ND
2015-10-22AD11602ND
2015-10-22AD11596ND
2015-10-22AD11599ND
2015-10-22AD11598ND
2015-10-22AD11597ND
2015-11-12AD13376ND
2015-11-12AD13378ND
2015-11-12AD13382ND
2015-11-12AD13386ND
2015-11-12AD13372ND
2015-11-12AD13380ND
2015-11-12AD13390ND
2015-11-12AD13457ND
2015-11-12AD13444ND
2015-11-12AD13456ND
2015-11-12AD13453ND
2015-11-12AD13443ND
2015-11-12AD13452ND
2015-11-12AD13455ND
2015-11-12AD13454ND
2015-11-16AD13699ND
2015-11-16AD13701ND
2015-11-16AD13700ND
2015-11-17AD13907ND
2015-12-08AD15973ND
2015-12-08AD15967ND
2015-12-08AD16048ND
2015-12-08AD16049ND
2016-02-18AD24361ND
2016-02-18AD24331ND
2016-02-18AD24299ND
2016-02-18AD24379ND
2016-03-03AD27014ND
2016-03-03AD26927ND
2016-03-16AD29223ND
2016-03-16AD29222ND
2016-03-17AD29432ND
2016-03-17AD29430ND
2016-03-17AD29381ND
2016-03-17AD29379ND
2016-03-17AD29435ND
2016-03-17AD29433ND
2016-03-23AD30127ND
2016-03-23AD30131ND
2016-03-23AD30129ND
2016-03-23AD30249ND
2016-03-23AD30250ND
2016-03-23AD30248ND
2016-03-23AD30155ND
2016-03-23AD30251ND
2016-06-03AD39456ND
2016-06-08AD39810ND
2016-06-08AD39818ND
2016-06-08AD39806ND
2016-06-08AD39863ND
2016-06-08AD39861ND
2016-06-08AD39802ND
2016-06-08AD39794ND
2016-06-08AD39808ND
2016-06-08AD39862ND
2016-06-08AD39860ND
2016-06-15AD40829ND
2016-06-16AD41019ND
2016-06-16AD41015ND
2016-06-16AD41041ND
2016-06-16AD41042ND
2016-06-16AD41013ND
2016-09-20AD50395ND
2016-09-20AD50391ND
2016-09-20AD50373ND
2016-09-20AD50375ND
2016-09-20AD50381ND
2016-09-20AD50459ND
2016-09-20AD50460ND
2016-09-21AD50831ND
2016-09-21AD50829ND
2016-09-21AD50809ND
2016-09-21AD50889ND
2016-09-21AD50890ND
2016-09-21AD50825ND
2016-09-22AD50815ND
2016-10-06AD52680ND
2016-10-06AD52682ND
2016-10-06AD52678ND
2016-10-06AD52676ND
2016-10-06AD52704ND
2016-10-06AD52706ND
2016-10-06AD52705ND
2016-10-06AD52674ND
2016-11-18AD58909ND
2016-11-18AD58877ND
2016-11-21AD58875ND
2016-11-21AD58903ND
2016-11-21AD58897ND
2016-11-21AD58879ND
2016-11-21AD58871ND
2016-12-02AD60483ND
2017-01-26AD67193ND
2017-01-26AD67205ND
2017-01-26AD67203ND
2017-01-26AD67327ND
2017-01-26AD67326ND
2017-02-28AD72614ND
2017-02-28AD72615ND
2017-03-01AD72767ND
2017-03-01AD72883ND
2017-03-01AD72882ND
2017-03-02AD73096ND
2017-03-02AD73124ND
2017-03-02AD73283ND
2017-03-02AD73284ND
2017-03-28AD77142ND
2017-03-28AD77184ND
2017-03-28AD77180ND
2017-03-28AD77186ND
2017-03-28AD77178ND
2017-03-28AD77273ND
2017-03-28AD77274ND
2017-03-29AD77428ND
2017-03-29AD77430ND
2017-03-29AD77444ND
2017-03-29AD77424ND
2017-04-26AD81177ND
2017-04-27AD81524ND
2017-04-27AD81528ND
2017-04-27AD81596ND
2017-04-27AD81598ND
2017-04-27AD81597ND
2017-07-06AD88484ND
2017-07-06AD88482ND
2017-07-06AD88548ND
2017-07-06AD88549ND
2017-07-25AD90637ND
2017-07-25AD90641ND
2017-07-25AD90639ND
2017-07-25AD90675ND
2017-07-26AD90867ND
2017-07-26AD90845ND
2017-07-26AD90935ND
2017-07-26AD90934ND
2017-08-15AD93122ND
2017-08-15AD93098ND
2017-08-15AD93120ND
2017-08-15AD93104ND
2017-09-11AD95487ND
2017-09-11AD95493ND
2017-09-11AD95485ND
2017-09-11AD95633ND
2017-09-11AD95634ND
2017-09-26AD98055ND
2017-09-26AD98057ND
2017-09-26AD98128ND
2017-09-26AD98129ND
2017-09-26AD98130ND
2017-11-07AE03895ND
2017-11-07AE03877ND
2017-11-07AE03875ND
2017-11-07AE03897ND
2017-11-07AE03883ND
2017-11-07AE03881ND
2017-11-07AE03932ND
2017-11-07AE03938ND
2017-11-14AE04773ND
2017-12-04AE06600ND
2017-12-04AE06598ND
2017-12-04AE06640ND