Rainwater Harvesting: Greenfield vs Milwaukee
How do rainwater harvesting rules compare between Greenfield, WI and Milwaukee, WI?
Greenfield and Milwaukee have similar restriction levels.
Greenfield, WI
Milwaukee County
Milwaukee County places no restriction on residential rainwater harvesting, and Wisconsin does not require a permit to collect rooftop rainwater for outdoor use. Rain barrels are encouraged regionally for stormwater control. Any indoor or plumbed system follows the Wisconsin plumbing code.
View full Greenfield rules →Milwaukee, WI
Milwaukee County
Milwaukee encourages rainwater harvesting through the MMSD rain barrel program. Rain barrels are unregulated at the City level and subsidized through regional stormwater programs.
View full Milwaukee rules →Key Facts Comparison
| Fact | Greenfield | Milwaukee |
|---|---|---|
| County rain-barrel rule | None (allowed) | - |
| State permit for barrels | Not required | - |
| Regional stance | Encouraged (stormwater) | - |
| Plumbed systems | Wis. plumbing code SPS 381-387 | - |
| Use | Outdoor irrigation | Non-potable only |
| Program | - | MMSD Fresh Coast |
| Rain Barrel Price | - | Around $55 |
| Cistern Permit | - | Over 500 gallons |
Highlighted rows indicate differences between cities.
Greenfield FAQ
Can I put a rain barrel on my house in Milwaukee County?
Yes. The county has no rainwater rule, and Wisconsin does not require a permit to collect rooftop rainwater for outdoor lawn and garden use.
Is rainwater harvesting encouraged here?
Yes. Regional stormwater programs, including MMSD green infrastructure, promote rain barrels and rain gardens to cut runoff into the combined sewer system.
When do I need a permit for rainwater?
If the system connects to indoor plumbing or reuses water inside a building, it must meet the Wisconsin plumbing code (SPS 381-387). Outdoor barrels do not.
Milwaukee FAQ
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