Routine pool measurement and ceritification is not required by USA Swimming, but it is considered best practice to have current certified competitive pool measurements on file with USA-S. World, American, and US Open records require that the pool be certified. If a potential record is swum in an uncertified pool and the pool was subsequently measured and found to not meet length standards, the potential record would not be accepted.
Measuring & Certifying Competition Pools
Instructions for measuring and certifying the dimensions of a competition pool. (updated March 2014 by USA Swimming)
USA-S Pool Certification Form
Form to be used to apply to USA Swimming for pool certification.
USA Swimming - List of Certified Pools