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EWG's Tap Water Database — 2021 UPDATE

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Dalapon

City of Houston

The herbicide dalapon has not been used in the U.S. since 1999. In animal studies, exposure to dalapon harms the kidneys.

MORE ABOUT THIS CONTAMINANT

 

475

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
2014ND960ND
2015ND640ND
2016ND740ND
2017ND1020ND
2018ND650ND
2019ND740ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 200 ppb

The legal limit for dalapon, established in 1992, was based on a toxicity study in laboratory animals published in 1960.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-05AC45667ND
2014-03-05AC45666ND
2014-03-05AC45649ND
2014-03-05AC45663ND
2014-03-05AC45650ND
2014-03-05AC45652ND
2014-03-05AC45687ND
2014-03-05AC45688ND
2014-03-05AC45662ND
2014-03-05AC45665ND
2014-03-05AC45651ND
2014-03-05AC45669ND
2014-03-05AC45648ND
2014-03-06AC45965ND
2014-03-06AC45943ND
2014-03-06AC45968ND
2014-03-14AC47173ND
2014-04-16AC50891ND
2014-04-16AC50893ND
2014-04-16AC50899ND
2014-04-16AC50892ND
2014-04-17AC51139ND
2014-04-17AC51143ND
2014-04-17AC51142ND
2014-04-17AC51144ND
2014-04-17AC51140ND
2014-04-17AC51141ND
2014-04-17AC51150ND
2014-04-17AC51138ND
2014-05-19AC54558ND
2014-05-19AC54559ND
2014-05-19AC54574ND
2014-05-19AC54560ND
2014-05-19AC54566ND
2014-05-19AC54552ND
2014-05-19AC54556ND
2014-05-19AC54563ND
2014-05-19AC54553ND
2014-05-19AC54568ND
2014-05-20AC54716ND
2014-05-20AC54748ND
2014-05-20AC54708ND
2014-05-20AC54719ND
2014-05-20AC54715ND
2014-05-20AC54713ND
2014-06-03AC55820ND
2014-07-15AC59753ND
2014-07-15AC59757ND
2014-07-15AC59754ND
2014-07-15AC59755ND
2014-07-15AC59752ND
2014-07-15AC59749ND
2014-07-15AC59770ND
2014-07-15AC59769ND
2014-07-15AC59750ND
2014-07-15AC59751ND
2014-07-15AC59756ND
2014-07-16AC59859ND
2014-07-16AC59879ND
2014-07-16AC59878ND
2014-07-16AC59892ND
2014-07-16AC59893ND
2014-07-16AC59897ND
2014-08-14AC63734ND
2014-08-14AC63738ND
2014-08-14AC63737ND
2014-08-14AC63740ND
2014-10-08AC69224ND
2014-10-08AC69228ND
2014-10-08AC69225ND
2014-10-09AC69380ND
2014-10-09AC69377ND
2014-10-09AC69376ND
2014-10-09AC69378ND
2014-10-09AC69375ND
2014-10-09AC69379ND
2014-12-09AC74240ND
2014-12-09AC74239ND
2014-12-09AC74238ND
2014-12-18AC75440ND
2014-12-18AC75453ND
2014-12-18AC75448ND
2014-12-18AC75446ND
2014-12-18AC75451ND
2014-12-18AC75447ND
2014-12-18AC75473ND
2014-12-19AC75631ND
2014-12-19AC75628ND
2014-12-19AC75649ND
2014-12-19AC75637ND
2014-12-19AC75645ND
2014-12-19AC75629ND
2014-12-19AC75625ND
2014-12-19AC75626ND
2014-12-19AC75638ND
2014-12-19AC75633ND
2015-03-04AC83017ND
2015-03-04AC82676ND
2015-03-04AC82679ND
2015-03-04AC82733ND
2015-03-04AC82669ND
2015-03-04AC82675ND
2015-03-04AC82671ND
2015-03-04AC82728ND
2015-03-04AC82667ND
2015-03-04AC82672ND
2015-03-04AC82668ND
2015-03-04AC82664ND
2015-03-04AC82673ND
2015-03-05AC82712ND
2015-03-05AC82708ND
2015-03-05AC82707ND
2015-03-05AC82688ND
2015-06-16AC96151ND
2015-06-16AC96154ND
2015-06-16AC96145ND
2015-06-16AC96139ND
2015-06-16AC96142ND
2015-06-16AC96137ND
2015-06-16AC96155ND
2015-06-16AC96150ND
2015-06-16AC96138ND
2015-06-17AC96243ND
2015-06-17AC96260ND
2015-06-17AC96262ND
2015-06-17AC96274ND
2015-06-17AC96273ND
2015-06-17AC96265ND
2015-09-16AD07294ND
2015-09-16AD07297ND
2015-09-16AD07293ND
2015-09-16AD07312ND
2015-09-16AD07313ND
2015-09-16AD07304ND
2015-09-16AD07302ND
2015-09-16AD07311ND
2015-09-16AD07292ND
2015-09-16AD07329ND
2015-09-16AD07327ND
2015-09-17AD07537ND
2015-09-17AD07538ND
2015-09-17AD07563ND
2015-09-17AD07536ND
2015-09-17AD07546ND
2015-11-16AD13562ND
2015-11-16AD13618ND
2015-11-16AD13561ND
2015-11-16AD13559ND
2015-11-16AD13619ND
2015-11-16AD13558ND
2015-11-16AD13565ND
2015-11-16AD13556ND
2015-11-16AD13557ND
2015-11-16AD13560ND
2015-11-17AD13768ND
2015-11-17AD13773ND
2015-11-17AD13767ND
2015-11-17AD13772ND
2015-11-17AD13771ND
2015-11-17AD13766ND
2016-02-18AD24477ND
2016-03-03AD26975ND
2016-03-16AD29181ND
2016-03-16AD29178ND
2016-03-16AD29018ND
2016-03-16AD29033ND
2016-03-16AD29030ND
2016-03-16AD29037ND
2016-03-16AD29019ND
2016-03-16AD29027ND
2016-03-16AD29029ND
2016-03-16AD29036ND
2016-03-16AD29032ND
2016-03-16AD29026ND
2016-03-17AD29414ND
2016-03-17AD29319ND
2016-03-17AD29323ND
2016-03-17AD29322ND
2016-03-17AD29318ND
2016-03-17AD29320ND
2016-03-17AD29321ND
2016-03-23AD30221ND
2016-06-15AD40718ND
2016-06-15AD40714ND
2016-06-15AD40722ND
2016-06-15AD40725ND
2016-06-15AD40726ND
2016-06-15AD40716ND
2016-06-15AD40719ND
2016-06-15AD40710ND
2016-06-15AD40730ND
2016-06-15AD40727ND
2016-06-15AD40720ND
2016-06-15AD40717ND
2016-06-16AD40972ND
2016-06-16AD40971ND
2016-06-16AD40964ND
2016-06-16AD40968ND
2016-09-20AD50441ND
2016-09-20AD50440ND
2016-09-20AD50324ND
2016-09-20AD50327ND
2016-09-20AD50330ND
2016-09-20AD50329ND
2016-09-20AD50325ND
2016-09-20AD50328ND
2016-09-20AD50326ND
2016-09-21AD50866ND
2016-09-21AD50707ND
2016-09-21AD50686ND
2016-09-21AD50697ND
2016-09-21AD50708ND
2016-09-21AD50712ND
2016-09-21AD50710ND
2016-09-21AD50696ND
2016-09-21AD50706ND
2016-09-21AD50695ND
2016-10-06AD52699ND
2016-11-17AD58543ND
2016-11-17AD58538ND
2016-11-17AD58539ND
2016-11-17AD58536ND
2016-11-17AD58544ND
2016-11-17AD58545ND
2016-11-18AD58825ND
2016-11-18AD58817ND
2016-11-18AD58820ND
2016-11-18AD58816ND
2016-11-18AD58818ND
2016-11-18AD58815ND
2016-11-18AD58819ND
2016-11-18AD58814ND
2016-11-21AD58774ND
2016-11-21AD58775ND
2017-01-26AD67268ND
2017-01-26AD67274ND
2017-01-26AD67273ND
2017-01-26AD67267ND
2017-02-28AD72569ND
2017-02-28AD72422ND
2017-02-28AD72419ND
2017-02-28AD72424ND
2017-02-28AD72399ND
2017-02-28AD72421ND
2017-02-28AD72420ND
2017-02-28AD72398ND
2017-02-28AD72418ND
2017-02-28AD72423ND
2017-02-28AD72397ND
2017-03-01AD72739ND
2017-03-01AD72742ND
2017-03-01AD72745ND
2017-03-01AD72737ND
2017-03-01AD72740ND
2017-03-01AD72738ND
2017-03-02AD73241ND
2017-03-28AD77238ND
2017-03-28AD77237ND
2017-03-28AD77248ND
2017-03-28AD77249ND
2017-03-28AD77239ND
2017-03-29AD77533ND
2017-03-29AD77531ND
2017-03-29AD77530ND
2017-03-29AD77532ND
2017-04-26AD81269ND
2017-04-26AD81142ND
2017-04-26AD81144ND
2017-04-26AD81139ND
2017-04-26AD81140ND
2017-04-26AD81136ND
2017-04-26AD81135ND
2017-04-26AD81143ND
2017-04-26AD81141ND
2017-04-26AD81145ND
2017-04-26AD81146ND
2017-04-26AD81137ND
2017-04-26AD81138ND
2017-04-27AD81578ND
2017-04-27AD81577ND
2017-04-27AD81479ND
2017-04-27AD81475ND
2017-04-27AD81478ND
2017-04-27AD81477ND
2017-07-06AD88537ND
2017-07-06AD88535ND
2017-07-25AD90530ND
2017-07-25AD90522ND
2017-07-25AD90525ND
2017-07-25AD90543ND
2017-07-25AD90545ND
2017-07-25AD90544ND
2017-07-25AD90523ND
2017-07-25AD90532ND
2017-07-25AD90524ND
2017-07-25AD90531ND
2017-07-25AD90521ND
2017-07-26AD90913ND
2017-07-26AD90799ND
2017-07-26AD90804ND
2017-07-26AD90796ND
2017-07-26AD90797ND
2017-07-26AD90802ND
2017-09-11AD95592ND
2017-09-11AD95599ND
2017-09-11AD95596ND
2017-09-11AD95593ND
2017-09-11AD95595ND
2017-09-11AD95597ND
2017-09-26AD98109ND
2017-09-26AD98108ND
2017-11-07AE03918ND
2017-11-07AE03920ND
2017-11-07AE03917ND
2017-11-07AE03916ND
2017-11-07AE03919ND
2017-11-07AE03921ND
2017-11-14AE04808ND
2017-11-15AE04936ND
2017-11-15AE04933ND
2017-11-15AE04925ND
2017-11-15AE04930ND
2017-11-15AE04931ND
2017-11-15AE04924ND
2017-11-15AE04926ND
2017-11-15AE04927ND
2017-11-15AE04929ND
2017-11-15AE04935ND
2017-11-15AE04928ND
2017-11-15AE04934ND
2017-11-15AE04932ND
2017-11-16AE05180ND
2017-11-16AE05181ND
2017-11-16AE05182ND
2017-12-04AE06626ND
2017-12-04AE06625ND
2018-01-18AE09316ND
2018-02-07AE12988ND
2018-02-07AE12993ND
2018-02-07AE12992ND
2018-02-07AE12989ND
2018-02-07AE13012ND
2018-02-07AE12952ND
2018-02-07AE12999ND
2018-02-07AE12958ND
2018-02-08AE12996ND
2018-02-08AE12990ND
2018-02-08AE12963ND
2018-02-08AE12991ND
2018-02-08AE13014ND
2018-02-08AE12997ND
2018-02-08AE13010ND
2018-02-08AE13011ND
2018-04-17AE22960ND
2018-04-17AE22998ND
2018-04-17AE22956ND
2018-04-17AE22955ND
2018-04-17AE22996ND
2018-04-17AE22961ND
2018-04-17AE22953ND
2018-04-17AE22994ND
2018-04-17AE22959ND
2018-04-18AE22995ND
2018-04-18AE22958ND
2018-04-18AE22962ND
2018-04-18AE22966ND
2018-04-18AE22965ND
2018-04-18AE22954ND
2018-05-22AE27203ND
2018-08-28AE38800ND
2018-08-28AE38798ND
2018-08-28AE38793ND
2018-08-28AE38807ND
2018-08-28AE38796ND
2018-08-28AE38805ND
2018-08-28AE38803ND
2018-08-28AE38792ND
2018-08-28AE38799ND
2018-08-28AE38797ND
2018-08-28AE38794ND
2018-08-28AE38795ND
2018-08-29AE38802ND
2018-08-29AE38806ND
2018-08-29AE38801ND
2018-08-29AE38804ND
2018-11-13AE46051ND
2018-11-13AE46052ND
2018-11-13AE46033ND
2018-11-13AE46049ND
2018-11-13AE46044ND
2018-11-13AE46050ND
2018-11-13AE46045ND
2018-11-13AE46055ND
2018-11-13AE46037ND
2018-11-13AE46054ND
2018-11-13AE46038ND
2018-11-13AE46039ND
2018-11-14AE46042ND
2018-11-14AE46043ND
2018-11-14AE46058ND
2018-11-14AE46053ND
2019-01-15AE50229ND
2019-01-15AE50230ND
2019-01-15AE50125ND
2019-01-15AE50069ND
2019-01-15AE50072ND
2019-01-15AE50068ND
2019-01-15AE50067ND
2019-01-15AE50075ND
2019-01-15AE50084ND
2019-01-15AE50070ND
2019-01-15AE50071ND
2019-01-15AE50093ND
2019-01-16AE50236ND
2019-01-16AE50087ND
2019-01-16AE50074ND
2019-01-16AE50088ND
2019-01-16AE50080ND
2019-01-16AE50073ND
2019-01-16AE50126ND
2019-03-06AE57435ND
2019-03-06AE57434ND
2019-04-10AE62131ND
2019-04-10AE62008ND
2019-04-10AE62027ND
2019-04-10AE62002ND
2019-04-10AE62030ND
2019-04-10AE62006ND
2019-04-10AE62007ND
2019-04-10AE62019ND
2019-04-10AE62020ND
2019-04-10AE62029ND
2019-04-10AE61994ND
2019-04-11AE61988ND
2019-04-11AE61985ND
2019-04-11AE61983ND
2019-04-11AE61984ND
2019-04-11AE61986ND
2019-04-11AE61987ND
2019-07-24AE75953ND
2019-07-24AE75954ND
2019-07-24AE75952ND
2019-07-24AE75955ND
2019-07-24AE75951ND
2019-07-24AE75949ND
2019-07-24AE75950ND
2019-07-24AE75944ND
2019-07-24AE75945ND
2019-07-24AE75956ND
2019-07-25AE76036ND
2019-07-25AE76035ND
2019-07-25AE75909ND
2019-07-25AE75904ND
2019-07-25AE75910ND
2019-07-25AE75906ND
2019-07-25AE75943ND
2019-07-25AE75942ND
2019-09-23AE84275ND
2019-09-23AE84274ND
2019-10-09AE86125ND
2019-10-09AE86124ND
2019-10-09AE86127ND
2019-10-09AE86128ND
2019-10-09AE86126ND
2019-10-09AE86122ND
2019-10-09AE86121ND
2019-10-09AE86129ND
2019-10-09AE86123ND
2019-10-10AE86286ND
2019-10-10AE86282ND
2019-10-10AE86285ND
2019-10-10AE86281ND
2019-10-10AE86283ND
2019-10-10AE86284ND
2019-10-10AE86287ND