I am a college swimmer and looking to buy an Apple Watch to keep track of my workouts, would any of the watches work for swimming in a chlorinated pool for 2 hours?

Perhaps this article will help:

About Apple Watch water resistance - Apple Support

Be aware that:

Water resistance isn't a permanent condition and may diminish over time. The following may affect the water resistance of your Apple Watch and should be avoided:

• Exposing Apple Watch to soap or soapy water (for example, while showering or bathing). 
• Exposing Apple Watch to perfume, solvents, detergent, acids or acidic foods, insect repellent, lotions, sunscreen, oil, or hair dye. 
• Wearing Apple Watch in the sauna or steam room.