Rainwater harvesting is legal in Ohio, and Butler County has no ordinance banning rain barrels. If harvested water is plumbed for indoor or potable use it falls under Ohio's private water systems rules (OAC 3701-28); simple outdoor rain barrels for garden use need no county permit.
Ohio does not prohibit collecting rainwater, and Butler County has no rule against rain barrels or cisterns for lawn and garden use. Outdoor collection for irrigation is unregulated at the county level. Where harvested rainwater is used for potable or indoor household supply, it becomes a 'private water system' regulated by the Ohio Department of Health under Ohio Administrative Code Chapter 3701-28, administered locally by the Butler County General Health District, and must meet construction and treatment standards. For simple rain barrels feeding a garden, no county permit is required. Cities and HOAs may have aesthetic rules on barrel placement.
No county penalty for a garden rain barrel. Non-compliant private (potable) water systems can be cited by the Butler County General Health District under OAC 3701-28.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Butler County's rainwater harvesting rules stack up against other locations.
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