Colorado law lets Castle Rock residents collect rooftop rainwater in up to two rain barrels holding a combined 110 gallons, with no permit required. Barrels are allowed at single-family homes and multi-family buildings of four or fewer units.
Under Colorado's rain-barrel law (Section 37-96.5-103, C.R.S., enacted by House Bill 16-1005), no permit or approval is required to capture and use precipitation in rain barrels with a combined storage capacity of 110 gallons. Collection must be from the roof of a building used primarily as a residence, and is limited to single-family households and multi-family households with four or fewer units. Barrels need sealable lids, and the water may only be used outdoors — for lawn and garden irrigation — on the property where it was collected. Rain-barrel water may not be used for drinking or indoor uses.
Exceeding 110 gallons total, using barrels for indoor/potable use, or collecting off non-residential roofs falls outside the statutory exemption and violates Colorado water law.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
Castle Rock, CO
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Castle Rock, CO
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Castle Rock, CO
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Castle Rock, CO
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Castle Rock, CO
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Castle Rock, CO
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See how Castle Rock's rainwater harvesting rules stack up against other locations.
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