Severna Park’s Katie Parker stepped to the block unaware of what was going to happen during the 100-yard breaststroke at the Maryland Public Secondary Schools Athletic Association 4A/3A swim and dive championships. It was the last individual race of her high school career, and a few minutes before she hit the water, she told her teammates three words: “I want it.”

She was talking about the 2012 state record set by Audrey Gould, the former Whitman star who now swims at Virginia.

In one of several brilliant performances on the afternoon, Parker cruised into the record books a minute later by beating Gould’s mark by nearly a second.

Wootton’s girls’ swimming team edged favored Churchill by two points to take home the state team title in a wild day at the Eppley Recreation Center in College Park.

The Richard Montgomery boys won the 200-yard medley relay and the 200-yard freestyle relay to capture their first MPSSAA state championship, racking up 42.5 more points than second-place Wootton.

The day was highlighted by several record-breaking performances, including marks by Walter Johnson’s Jean-Marc Nugent in the 100-yard freestyle (46.99), Einstein junior Rory Lewis in the 100-yard butterfly (50.79), and Churchill sophomore Hannah Lindsey in the 100-yard backstroke. Parker rounded out the day with the last record-breaker, which capped a grueling run for her team this month, she said.

“It wasn’t something that I expected . . . but I wanted it,” Parker said. “It’s been a great season.”

Wootton’s girls’ team was boosted by a win from Emily Zhang in the 200-yard individual medley and a second-place finish from Kristi Li in the 100-yard backstroke, which was won by Lindsey. Wootton edged Churchill 292.5 to 290.5, while Walter Johnson took third place with 169.5 points.

“We knew it was going to be really close,” Li said.

Richard Montgomery’s boys’ team, which took third at Metros two weeks ago and won the region championship last week, rode that momentum to a state title Saturday despite not having any individual winners. Broadneck, which finished third with 221 points, was in the hunt for much of the race and poised to pull a stunning upset — but Richard Montgomery’s depth was too much.

“At the beginning of the year, they set their mind to it that they really wanted to win a state championship,” Richard Montgomery Coach Aryn Wheeler said. “They’re happy with the outcome.”

In the 3A/2A/1A championship meet, Poolesville won the boys’ title with 346 points over Queen Anne (182) and Seneca Valley (161). C. Milton Wright won the girls’ meet with 327.5 points. Poolesville was second (297.5), followed by Frederick (167.5).