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Nina Mazereeuw

Age: 18 years old
Age Category: 17-18
Team: Charles River Aquatics | New England Swimming

Personal Best

Short course distance

Event Time Age Date Standard Next Standard Charles River Aquatics New England Swimming Eastern Zone USA
Free 50 Y 24.88 18 12/11/2025 AA AAA: 24.69 (+0.19s | 0.8%) 5 37 237 1,000+
Free 100 Y 52.75 Analysis 18 07/30/2026 AAA AAAA: 51.09 (+1.66s | 3.1%) 3 18 111 568
50 Free
25.24
25.24
100 Free
27.51
52.75
100 Free
52.75
Free 200 Y 1:54.25 Analysis 18 12/11/2025 AAA AAAA: 1:50.39 (+3.86s | 3.4%) 4 22 137 546
50 Free
26.38
26.38
100 Free
29.04
55.42
100 Free
55.42
150 Free
29.61
1:25.03
200 Free
29.22
1:54.25
100 Free
58.83
Free 500 Y 5:17.84 Analysis 18 03/21/2024 AA AAA: 5:11.59 (+6.25s | 2.0%) 7 35 242 962
50 Free
28.48
28.48
100 Free
32.07
1:00.55
100 Free
1:00.55
150 Free
32.08
1:32.63
200 Free
32.17
2:04.80
100 Free
1:04.25
250 Free
32.46
2:37.26
300 Free
32.30
3:09.56
100 Free
1:04.76
350 Free
32.20
3:41.76
400 Free
33.56
4:15.32
100 Free
1:05.76
450 Free
31.80
4:47.12
500 Free
30.72
5:17.84
100 Free
1:02.52
Free 1000 Y 10:57.02 Analysis 18 12/11/2025 AA AAA: 10:49.09 (+7.93s | 1.2%) 6 30 170 597
50 Free
28.93
28.93
100 Free
32.00
1:00.93
100 Free
1:00.93
150 Free
32.08
1:33.01
200 Free
32.33
2:05.34
100 Free
1:04.41
250 Free
32.74
2:38.08
300 Free
33.08
3:11.16
100 Free
1:05.82
350 Free
33.21
3:44.37
400 Free
33.46
4:17.83
100 Free
1:06.67
450 Free
33.49
4:51.32
500 Free
33.20
5:24.52
100 Free
1:06.69
550 Free
34.15
5:58.67
600 Free
33.94
6:32.61
100 Free
1:08.09
650 Free
33.73
7:06.34
700 Free
32.92
7:39.26
100 Free
1:06.65
750 Free
33.21
8:12.47
800 Free
33.66
8:46.13
100 Free
1:06.87
850 Free
34.01
9:20.14
900 Free
33.60
9:53.74
100 Free
1:07.61
950 Free
31.90
10:25.64
1000 Free
31.38
10:57.02
100 Free
1:03.28
Back 50 Y 28.34 18 07/30/2026 AA AAA: 27.19 (+1.15s | 4.1%) 4 42 176 696
Back 100 Y 1:01.73 Analysis 18 02/06/2026 A AA: 1:00.29 (+1.44s | 2.3%) 9 69 342 1,000+
50 Back
29.66
29.66
100 Back
32.07
1:01.73
100 Back
1:01.73
Breast 100 Y 1:13.35 Analysis 18 12/11/2025 BB A: 1:12.69 (+0.66s | 0.9%) 8 75 471 1,000+
50 Breast
34.74
34.74
100 Breast
38.61
1:13.35
100 Breast
1:13.35
Breast 200 Y 2:41.24 Analysis 18 01/02/2026 BB A: 2:38.29 (+2.95s | 1.8%) 8 64 436 1,000+
50 Breast
36.74
36.74
100 Breast
41.52
1:18.26
100 Breast
1:18.26
150 Breast
41.23
1:59.49
200 Breast
41.75
2:41.24
100 Breast
1:22.98
Fly 50 Y 26.89 18 07/30/2026 AAA AAAA: 25.89 (+1.00s | 3.7%) 5 26 143 500
Fly 100 Y 59.09 Analysis 18 07/30/2026 AA AAA: 57.79 (+1.30s | 2.2%) 5 34 222 924
50 Fly
27.50
27.50
100 Fly
31.59
59.09
100 Fly
59.09
Fly 200 Y 2:10.33 Analysis 18 02/06/2026 AA AAA: 2:07.89 (+2.44s | 1.9%) 4 19 137 497
50 Fly
29.63
29.63
100 Fly
33.58
1:03.21
100 Fly
1:03.21
150 Fly
33.34
1:36.55
200 Fly
33.78
2:10.33
100 Fly
1:07.12
IM 200 Y 2:09.50 Analysis 18 03/13/2026 AA AAA: 2:08.49 (+1.01s | 0.8%) 3 17 116 549
50 Fly
27.39
27.39
100 Back
32.35
59.74
100 IM
59.74
150 Breast
40.13
1:39.87
200 Free
29.63
2:09.50
100 IM
1:09.76
IM 400 Y 4:41.91 Analysis 18 02/06/2026 AA AAA: 4:35.49 (+6.42s | 2.3%) 6 26 180 729
50 Fly
29.77
29.77
100 Fly
31.50
1:01.27
100 Fly
1:01.27
150 Back
37.15
1:38.42
200 Back
35.56
2:13.98
100 Back
1:12.71
250 Breast
41.86
2:55.84
300 Breast
43.29
3:39.13
100 Breast
1:25.15
350 Free
32.19
4:11.32
400 Free
30.59
4:41.91
100 Free
1:02.78

Long course distance

Event Time Age Date Standard Next Standard Charles River Aquatics New England Swimming Eastern Zone USA
Free 50 M 28.05 18 06/25/2026 AAA AAAA: 26.89 (+1.16s | 4.1%) 4 17 90 554
Free 100 M 59.91 Analysis 18 07/23/2025 AAA AAAA: 58.29 (+1.62s | 2.7%) 2 13 62 366
50 Free
28.60
28.60
100 Free
31.31
59.91
100 Free
59.91
Free 200 M 2:12.23 Analysis 18 07/09/2026 AA AAA: 2:11.69 (+0.54s | 0.4%) 2 16 90 538
50 Free
30.80
30.80
100 Free
34.30
1:05.10
100 Free
1:05.10
150 Free
33.73
1:38.83
200 Free
33.40
2:12.23
100 Free
1:07.13
Free 400 M 4:45.02 Analysis 18 06/25/2026 AA AAA: 4:37.69 (+7.33s | 2.6%) 3 21 116 672
50 Free
32.11
32.11
100 Free
36.41
1:08.53
100 Free
1:08.53
150 Free
36.46
1:44.99
200 Free
36.44
2:21.43
100 Free
1:12.90
250 Free
35.32
2:56.75
300 Free
35.97
3:32.72
100 Free
1:11.29
350 Free
36.23
4:08.96
400 Free
36.06
4:45.02
100 Free
1:12.29
Back 50 M 33.19 18 07/23/2025 AA AAA: 32.19 (+1.00s | 3.0%) 5 33 119 695
Back 100 M 1:10.77 Analysis 18 06/25/2026 A AA: 1:10.59 (+0.18s | 0.3%) 6 35 146 824
50 Back
34.26
34.26
100 Back
36.51
1:10.77
100 Back
1:10.77
Fly 50 M 29.69 18 07/09/2026 AAA AAAA: 28.79 (+0.90s | 3.0%) 3 13 51 313
Fly 100 M 1:07.61 Analysis 18 06/25/2026 AA AAA: 1:05.69 (+1.92s | 2.8%) 5 25 118 660
50 Fly
31.03
31.03
100 Fly
36.58
1:07.61
100 Fly
1:07.61
IM 200 M 2:36.22 Analysis 18 07/09/2026 A AA: 2:35.49 (+0.73s | 0.5%) 7 36 192 1,000+
50 Fly
32.10
32.10
100 Back
40.87
1:12.97
100 IM
1:12.97
150 Breast
47.95
2:00.92
200 Free
35.30
2:36.22
100 IM
1:23.25

Above are the fastest times that Nina Mazereeuw has achieved in her swimming career. For each event, you can find Nina's best time, the corresponding time standard, as well as how much faster Nina needs to be to reach the next level. The last columns provide Nina rankings at the team and LSC levels. These rankings are based on the Nina's personal best, her current age category, and team; and are calculated from all the meets results.

Disclaimer: This Website is not affiliated with USA Swimming or any Local Swim Committee. The rankings and times displayed on this website are unofficial and should not be viewed as such. We update our information regularly, but we cannot guarantee that the data is accurate, timely, or complete. The only purpose of this website is entertainment. None of the information here should be used for university admission applications.