The outside water park opens at 12pm to 6pm every day except sunday (1pm to 6pm), and during these times, you are allowed to use all three pools. The inside lap pools (which can only be used for lap swimming) are open from 8am to 9pm on Monday and Thursday & 6am to 9pm on Tuesday and Thrusday. More info here - https://www.gwinnettcounty.com/web/gwinnett/Departments/CommunityServices/ParksandRecreation/OurParksandFacilities/GuidetoYourParks/WestGwinnettParkandAquaticCenter
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