Link to the state LSC (South Dakota Swimming): 

https://www.teamunify.com/team/sdslsc/page/time-standards-records-top-16

The first document on that page is a PDF showing the current Time Standards (State Qualifying Times)! Below that are all the state records! 

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The USA Swimming Motivational Time Standards are here: 

https://www.usaswimming.org/docs/default-source/timesdocuments/records/age-groups-2024-agmts.pdf?_ga=2.255096072.1436303828.1636493039-1804556371.1563844622