Ganguly surpassed Aryan Nehra's timing of 4:27:62 which he had set at the Nationals last month.
'Never say never. National Junior Record for 1500m freestyle broken'
The top eight swimmers from the two heats made it to the final.
The 20-year-old clocked 24.40s in the men's 50m backstroke event to finish 26th in the overall heats.
The timings clocked and records in this meet, which is being contested in a 25m swimming pool, are different from the more traditional long course ones.
World C'ships: Sajan Prakash finishes 25th, fails to progress to final
Swimmer Maana Patel registers Best Indian Time
Karnataka swimmer Aaron Agnel D'Souza on Sunday bettered his personal national record in the 100m freestyle event in the 65th Senior National Aquatics Championships which drew to a close in Ranchi on Sunday.
Rehan Poncha helped Karnataka to retain the top position with 18 gold medals on the penultimate day of the 65th Senior National Aquatic Championship by winning his fifth gold.
Four national records were broken as Karnataka's Aaron Agnel D'Souza clinched three gold medals and ace swimmer Richa Mishra added one, taking her tally to four, in the 65th Senior National Aquatic Championships in Ranchi, on Friday.
Richa Mishra rewrote two of her national records as she won three gold medals, while Olympics qualifier Sandeep Sejwal set another national record on the second day of the 65th Senior National Aquatic Championships in Ranchi on Thursday.
Embarrassment piled on India ahead of next month's Commonwealth Games with three swimmers, two of them part of the country's team for the mega-event, flunking dope tests in New Delhi on Sunday.
Karnataka clinched both the men's and women's team titles in the 63rd Senior National Aquatic Championships at the LNCPE pool near Thiruvananthapuram on Saturday, a day when 26 existing records were erased.
They set four new national marks as Nisha Millet won her fifth gold in the 57th National Aquatics Championships.
Karnataka emerged overall champions in the national Aquatics championships.
The Karnataka girl, participating in the Nationals after a five-year haitus, won the women's 400m freestyle with a national record.
Viraj Patil won the one-metre springboard diving for his third gold in the 58th Senior National Aquatic Championships.
Karnataka won the 58th Senior National Aquatic Championships for the third consecutive year on Sunday.
The former sunk the men's 1500m freestyle mark while Taniya Ganguly bettered her own record in the 3-metre springboard diving at the Senior National Aquatics Championships.
Delhi's Richa Mishra and Nisha Millet of Karnataka easily won the women's 50-metre butterfly and 400 metres freestyle respectively on the opening day of the 58th Senior National Aquatic Championships.
The Karnataka swimmer bettered his own national record in the 200m butterfly stroke at the Jr Nat aquatics championships.
The Karnataka swimmer picked his second gold at the Nat. Junior aquatic championships.
The 16-year-old Karnataka swimmer, who returned from Perth last week, set a new 200 metres individual medley mark in the National aquatic championships.
The Police swimmer erased Bula Chowdhury's mark in the 100m butterfly at the National Aquatics championships.
The Police swimmer added the 400m medley to the 50m butterfly mark she set on Wednesday, at the national Aquatics meet.