Swimmer profile
Katharine Costello
Female15-16Empire KC Swim ClubMV · CENTRAL
SeasonUSA Swimming season runs Sept – Aug
Event
2020–21
2021–22
2022–23
2025–26
50 Free LCM
37.65
31.67
▲ 5.98
30.51
▲ 1.16
—
100 Free LCM
1:23.57
1:11.53
▲ 12.04
1:06.97
▲ 4.56
—
200 Free LCM
3:02.88
2:34.52
▲ 28.36
2:34.05
▲ 0.47
—
400 Free LCM
—
5:38.87
5:24.47
▲ 14.40
5:06.19
▲ 18.28
50 Back LCM
51.03
41.13
▲ 9.90
—
—
100 Back LCM
1:38.73
—
1:19.69
▲ 19.04
—
50 Breast LCM
51.45
41.75
▲ 9.70
—
34.49
▲ 7.26
100 Breast LCM
1:45.73
1:31.66
▲ 14.07
1:26.60
▲ 5.06
1:16.53
▲ 10.07
200 Breast LCM
—
—
3:10.70
3:00.46
▲ 10.24
50 Fly LCM
48.53
37.58
▲ 10.95
—
—
100 Fly LCM
—
1:27.87
1:21.33
▲ 6.54
—
200 IM LCM
3:26.80
3:00.21
▲ 26.59
2:51.89
▲ 8.32
2:35.85
▲ 16.04
400 IM LCM
—
—
—
5:50.34
Improvement<0.5s0.5–2s2–5s5s+Slower
📊 All Attempts by Event
Chronological history of every recorded swim. Click an event to expand its attempt list.