In its quest for another postseason title, Mercer Island swim and dive ran into its first roadblock at the district meet.

Lakeside bested Mercer Island at the Sea-King 3A girls swim and dive district championships Saturday at Mary Wayte Pool, winning with a team score of 255.5 to Mercer Island’s 221.5.

“Sometimes teams just have more swims and more swimmers and I think [Lakeside] had a couple more swims than we had today,” swim coach Chauntelle Johnson said after the meet. “My big thing was to get as many kids into next week as possible.”

Four district records were broken at Saturday’s meet, with Bellevue’s Kim Williams breaking her own record in the 200 IM with a time of 2:02.21 and setting a new record in the 100 breast at 1:03.42. Lakeside’s 200 free relay team of Caroline Wagner, Yasmin Luthra, Abby Wagner and Helen Teegan set a new mark at 1:38.32, while Lakeside’s 400 free relay team of Luthra, Addie Chambers, Amber Chong and Caroline Wagner broke a 2011 record set by Mercer Island, finishing at 3:36.11.

Sabrina Kwan was Mercer Island’s lone event winner, edging Holy Names’ Sophia Chien in the 100 yard fly by 0.03 seconds with a winning time of 57.83.

Mercer Island’s team of Kwan, Sofija Raisys, Emily Koksu and Sammie Edwards placed fifth (1:53.56) in the 200 medley relay.

Leah Fisk took third (1:56.2) and Maeve Murdoch was fourth (1:56.94) in the 200 free, and Kwan tied with Lakeside’s Helen Teegan for fourth in the 50 free at 24.95.

Hadley Michaels placed fourth (357.95) and Kayla Varney was eighth (284.45) in the diving event.

Murdoch was fourth (54.52) in the 100 free, while Fisk took third (5:12.37) and Angela Riggins was fifth (5:20.03) in the 500 free.

The team of Edwards, Murdoch, Fisk and Kwan finished second (1:39.53) in the 200 free relay, Audrey Hixon was fourth (1:01.63) in the 100 back, and Mercer Island’s team of Murdoch, Ellie Williams, Riggins and Fisk finished second (3:38.27) in the 400 free relay.

Johnson wasn’t too worried about the Islanders missing out on the district title, saying she didn’t see much to be concerned about from their performance. In preparation for the state tournament, she said her team’s focus would be to outperform themselves.

“We can’t control other teams. I can’t control how other kids swim, but we can control our kids,” Johnson said. “We can help them figure out how to be better prepared and how to make sure that they’re ready for next week, so our goal is to outperform ourselves.”

Mercer Island will compete at the 3A state championship meet Nov. 14-15 at the King County Aquatic Center in Federal Way.