Collegiate level Quah had represented the
UCLA Bruins during her time at the
University of California, Los Angeles.
International level 2005 Southeast Asian Games Quah first represented Singapore on the international level in the
2005 Southeast Asian Games.
2008 Olympic Games At the
2008 Olympic Games, Quah failed to qualify in the heats of the 400m Individual Medley event but set a new national record (4:51.25).
2009 Asian Youth Games Quah was Singapore's flag bearer for the
2009 Asian Youth Games. She won three individual gold medals in the 50 m, 100 m and 200 m freestyle events while setting national records for all three (25.43, 55.57 and 1:59.21). She won the team gold and bronze medals in the 4 × 100 m freestyle relay and 4 × 100 m medley relay events, respectively.
2013 FINA Swimming World Cup Quah set a new national record in the 200 m freestyle event in the second leg of the
2013 FINA Swimming World Cup, held in
Berlin,
Germany. Her new timing of 1:58.80 was 0.09 seconds faster than
Lynette Lim's three-day-old record of 1:58.89.
Southeast Asian Games Quah has represented Singapore and won, at the following games: •
2005 Southeast Asian Games (2 silvers, 2 bronzes) •
2007 Southeast Asian Games (2 golds, 3 silvers) •
2009 Southeast Asian Games (5 golds, 2 silvers, 1 bronze) •
2013 Southeast Asian Games (2 golds, 5 silvers) •
2015 Southeast Asian Games(4 golds, 4 silvers) •
2017 Southeast Asian Games (4 golds, 1 silver, 1 bronze) •
2019 Southeast Asian Games (6 golds) •
2021 Southeast Asian Games (4 golds, 2 silvers, 1 bronze) •
2023 Southeast Asian Games (6 golds, 2 silvers) ==Personal life==