| Fr 30 Apr | | |  | FFBN |
20e Grand Prix International de la Communauté Française 2010 (50m, 8l) | | International |
| Su 25 Apr | | |  | WZK |
3e dag van het Provinciaal Criterium voor B en C-zwemmers (25m, 5l) | | District |
| | | | ZB |
Competitie te Diksmude (25m, 5l) | | District |
| | | | ZDML |
Sprint (25m, 5l) | | District |
| | | | AZS |
Vlaams-Brabant Classic Swimming Meeting (25m, 5l) | | National |
| | | | ZOLA |
19° Antwerp International Youth Swimming Cup 2010 (50m, 1l) | | International |
| | | | CNJ |
Grand Prix de le Ville de Jodoigne 2010 (25m, 5l) | | National |
| Sa 24 Apr | | | | AZS |
Vlaams-Brabant Classic Swimming Meeting (25m, 5l) | | National |
| | | | ZOLA |
19° Antwerp International Youth Swimming Cup 2010 (50m, 1l) | | International |
| Fr 23 Apr | | | | ZOLA |
19° Antwerp International Youth Swimming Cup 2010 (50m, 1l) | | International |
| Su 18 Apr | | |  | HZS |
Limburgse Lange Afstand 2010 (25m, 5l) | | Federal |
| | | | ZNA |
Sprintcompetitie Denderend Aalst 2010 (50m, 8l) | | District |
| | | | ZCK |
Uplace Cup 2010 (25m, 5l) | | National |
| | |  | |
