Rainwater harvesting is legal and encouraged in Multnomah County. Oregon does not restrict residential rainwater collection under ORS 537. Portland's Ecoroof and Clean River Rewards programs provide stormwater fee discounts for rainwater capture. Oregon Plumbing Specialty Code (OAR 918-750) governs potable rainwater systems. Simple rain barrels require no permits.
Oregon is one of the most rainwater-friendly states in the US: ORS 537 confirms landowners may collect rainwater from rooftops for beneficial use without water rights. Multnomah County and Portland actively encourage rainwater harvesting as green infrastructure. Simple rain barrels (typically 50-100 gallons, non-pressurized, for garden/lawn irrigation) require no permits anywhere in the county. Larger cisterns, pressurized systems, or any system plumbed into the house must comply with Oregon Plumbing Specialty Code (OPSC, OAR 918-750) and the Uniform Plumbing Code Appendix M - typically triggering plumbing permits through Portland BDS or County Land Use. Potable use requires UV/filtration treatment meeting state health standards. Portland's Clean River Rewards program (PCC 17.36) offers stormwater utility bill discounts up to 35% for on-site rainwater management including rain gardens, eco-roofs, and rain barrels. Portland Ecoroof Program has incentivized over 550 vegetated roofs. Rainwater systems serving toilet flushing or cold-water laundry require backflow prevention on any city water cross-connection. HOAs may have visual screening requirements but cannot ban collection outright.
No penalties for standard rain barrel installation. Unpermitted large cistern plumbed indoors: building code violation $250 to $2,500 plus required permit. Cross-connection without backflow prevention: city water service penalty $500+ and system disconnection until corrected. Potable rainwater without treatment serving a residence: public health enforcement action.
Troutdale, OR
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Troutdale, OR
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Troutdale, OR
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Troutdale, OR
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Troutdale, OR
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Troutdale, OR
TMC 10.12.040 requires all vehicles parked on private property to sit on a hard, durable surface like concrete, asphalt, or compacted gravel. Front-yard park...
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