Yes, rainwater collection is legal in Nevada, but subject to strict water rights laws and local ordinances. The state permits residential and non-potable use under Nevada Revised Statutes (NRS) 533.025, provided it does not interfere with prior appropriation rights or municipal systems. The Southern Nevada Water Authority (SNWA) and Washoe County Health District impose additional permitting requirements for storage systems exceeding 2,500 gallons.
Key Regulations for Rainwater Collection in Nevada
- Prior Appropriation Doctrine: Collection is permitted only if it does not diminish surface or groundwater rights held by senior users under NRS 533.025. Unauthorized diversion may trigger enforcement actions by the Nevada State Engineer.
- Storage Limits & Permits: Systems over 2,500 gallons require permits from local authorities (e.g., SNWA or county health departments). Smaller systems must comply with building codes but avoid potable water contamination risks.
- Use Restrictions: Collected rainwater may not be used for drinking unless treated to meet Nevada’s drinking water standards (NAC 445A.400). Outdoor irrigation and non-potable indoor uses (e.g., toilet flushing) are typically permitted without treatment.
Local jurisdictions, such as Clark County, may impose additional constraints, including mandatory inspections for larger systems. The 2026 Nevada Legislative Session is considering amendments to NRS 533 to clarify rainwater harvesting rules, potentially expanding allowances for agricultural and residential use while tightening oversight for commercial-scale systems. Always verify current local ordinances before installation.