Good evening, Salt Lake! We are officially moving into peak valley summer. For thousands of homeowners in classic SLC neighborhoods—from mid-century Rose Park ramblers to historic bungalows in the Avenues—this is the week we officially call backup duty on our trusty evaporative coolers. Swamp coolers are a staple of Salt Lake living because our dry desert climate makes them incredibly efficient. But they have one major nemesis: Wasatch hard water. Before the daily highs consi