El Salvador competed at the 2017 World Aquatics Championships in Budapest, Hungary from 14 July to 30 July.
Open water swimming
El Salvador has entered one open water swimmer
AthleteEventTimeRankFatima FloresWomen's 5 km1:07:09.449Women's 10 km2:18:47.954
Swimming
Salvadoran swimmers have achieved qualifying standards in the following events (up to a maximum of 2 swimmers in each event at the A-standard entry time, and 1 at the B-standard):
AthleteEventHeatSemifinalFinalTimeRankTimeRankTimeRankMarcelo AcostaMen's 200 m freestyle1:50.92 48did not advanceMen's 400 m freestyle3:51.7624colspan=2 did not advanceMen's 800 m freestyle7:55.7014colspan=2 did not advanceMen's 1500 m freestyle15:04.79 14colspan=2 did not advanceOtto BorgardsMen's 100 m breaststroke1:10.6269did not advanceMen's 200 m breaststroke2:30.73 40did not advanceCelina MarquezWomen's 50 m backstroke30.38 45did not advanceWomen's 200 m backstroke2:22.7330did not advance
References