Macomb County government does not restrict residential rainwater harvesting. Michigan has no statewide ban on rain barrels or cisterns, and the County encourages rain gardens and rain barrels for stormwater management through Public Works and MSU Extension. Any plumbing rules come from state code and your municipality.
Michigan does not prohibit residential rainwater collection, and there is no Macomb County ordinance limiting rain barrels or cisterns for outdoor, non-potable use such as landscape irrigation. The County promotes green stormwater practices (rain barrels, rain gardens, native plantings) to reduce runoff into county drains, and MSU Extension provides how-to guidance. Collecting roof runoff in a barrel for garden watering is unregulated at the county level. Systems that connect to household plumbing, or that provide potable (drinking) water, must meet the Michigan Plumbing Code and any local building-permit requirements enforced by your city, village, or township building department, not the County. Because rainwater capture reduces sediment- and volume-loading on county drains, it aligns with the Public Works Office's stormwater goals
There is no Macomb County fine for using a rain barrel or outdoor cistern. Enforcement for an improperly plumbed or potable rainwater system would come from your local building department under the Michigan Plumbing Code. A rainwater installation that creates
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