2021 NCSA Summer Swimming Championships
- August 10-14, 2021
- Huntsville, AL
- Huntsville Aquatic Center
- Meet Site
- Psych Sheet
- Timelines
- LIVE STREAM
- Live results can be found on MeetMobile
TNT Swimming 15-year-old Levenia Sim swam lifetime bests in 7 events at last weeks NCSA Summer Championships. The newly-turned 15-year-old’s best race arguably came on the final night of the meet, when she swam a 28.79 to win the women’s 50 backstroke.
The swim was a personal best for Sim by 0.37 seconds, which is considerable given that her previous best of 29.16 was swum less than a month ago. Not only was the swim a personal best for Sim, it also launched her into the all-time top 10 for 15-year-olds, as well as the 15-16 girls age group. Sim is now ranked #8 all-time for 15-year-olds in the girls LCM 50 back.
Here are the current all-time top 10 rankings for 15-year-olds:
| Rank | Time | Swimmer | Meet |
| 1 | 27.85 | Regan Smith | 2018 Pro Series – Austin |
| 2 | 28.17 | Isabelle Stadden | 2018 Mel Zajac Jr. International |
| 3 | 28.44 | Phoebe Bacon | 2018 Summer Nationals |
| 4 | 28.54 | Maggie Wanezek | 2021 Speedo Summer Champs |
| 5 | 28.65 | Annabel Crush | 2018 Summer Nationals |
| 6 | 28.71 | Alex Walsh | 2017 Summer Nationals |
| 7 | 28.77 | Claire Curzan | 2019 World Jr Champs |
| 8 | 28.79 | Levenia Sim | 2021 NCSA Summer Champs |
| 9 | 28.94 | Grace Ariola | 2015 World JR Champs |
| 9 | 28.94 | Gretchen Walsh | 2018 Summer Nationals |
Sim has just narrowly made it into the all-time top 10 for 15-16 girls as well:
| Rank | Time | Swimmer | Meet |
| 1 | 27.85 | Regan Smith | 2018 Pro Series – Austin |
| 2 | 28.02 | Phoebe Bacon | 2019 Mare Nostrum – Canet |
| 3 | 28.13 | Isabelle Stadden | 2018 Summer Nationals |
| 4 | 28.25 | Alex Walsh | 2018 Summer Nationals |
| 5 | 28.54 | Maggie Wanezek | 2021 Speedo Summer Champs |
| 6 | 28.65 | Annabel Crush | 2018 Summer Nationals |
| 7 | 28.66 | Katharine Berkoff | 2017 Summer Nationals |
| 8 | 28.70 | Abby Kapeller | 2019 Pro Series – Austin |
| 9 | 28.79 | Claire Curzan | 2019 World Jr Champs |
| 10 | 28.79 | Levenia Sim | 2021 NCSA Summer Champs |
Here is a summary of Sim’s personal bests last week:
| Event | Previous Best | New Personal Best | Improvement |
| 50 fly | 28.21 | 27.77 | -0.44 |
| 100 fly | 1:01.46 | 1:00.91 | -0.55 |
| 200 fly | 2:23.69 | 2:20.19 | -3.50 |
| 50 free | 27.30 | 26.88 | -0.42 |
| 100 free | 58.74 | 57.95 | -0.79 |
| 50 breast | 34.83 | 33.12 | -1.71 |
| 50 back | 29.16 | 28.79 | -0.37 |