Reilly Tiltmann picked up three victories for the meet, claiming the women’s 100 back (53.11), 200 back (1:54.26) and 100 fly (53.82).
Norton also established lifetime bests in the 50 free (20.60), 100 free (44.31), 500 free (4:30.59) and 100 back (48.37).
Nation’s Capital led USA Swimming’s Club Excellence Rankings for the seventh straight year with 71,900 points.
Dressel set three world records during the league final, and also lowered the American Record in the 100 freestyle on two occasions.
The Russian led off in 48.58 to obliterate Xu Jiayu’s 100 backstroke world record by three-tenths of a second.
Olivia Smoliga, Lilly King, Kelsi Dahlia and Erika Brown combined to smash a five-year-old world record in the women’s 400 medley relay.
Peaty re-broke his world record in the 100 breaststroke, and also set a new British Record in the 50 breast in the first round of the skins during the final.
Sarah Sjostrom’s 51.01 split was crucial in Energy Standard defeating the Cali Condors in the mixed 400 freestyle relay.
The 23-year-old blasted a time of 24.80 to lower Kelsi Dahlia’s national mark of 24.93 set in 2018.
Haas put up a time of 1:40.49 to take Ryan Lochte’s American Record of 1:41.08 from 2010 off the books.
The Condors claim the 2020 league title after placing third in 2019.
One week after becoming the first man sub-50, Caeleb Dressel took six more tenths off his world record in a scintillating time of 49.28.
After lowering the 11-year-old world record a week ago, Peaty brought the all-time mark down to 55.41 during the ISL Grand Final.
The 29-year-old clocked 1:48.66 to break his own American Record of 1:49.02 set in the semi-finals.
Lilly King busted through the 1:03 barrier for the first time in 1:02.50, breaking Katie Meili’s 2016 American Record of 1:02.92.