Rainwater harvesting is legal in Salt Lake City under Utah Code §73-3-1.5, but users must register with the Utah Division of Water Rights. Limited to 2,500 gallons with registration; 200 gallons without.
Utah was historically one of the last states to legalize rainwater collection. Under Utah Code §73-3-1.5, residents may collect up to 200 gallons in two containers (max 100 gallons each) without registration. With free registration through the Utah Division of Water Rights, collection increases to 2,500 gallons in an above-ground storage container. Underground cisterns require a water right. Salt Lake City does not impose additional limits beyond state law but does promote rainwater use through its Sustainability Department. Collected water may only be used on the parcel where collected. The city's stormwater code (Chapter 17.81) recognizes rain gardens as a stormwater best management practice.
Unregistered collection above 200 gal or over-limit collection: Division of Water Rights enforcement; typically warning first, then administrative penalty up to $5,000 per Utah Code §73-2-25.
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