Rainwater Harvesting: Vacaville vs Vallejo
How do rainwater harvesting rules compare between Vacaville, CA and Vallejo, CA?
Vacaville and Vallejo have similar restriction levels.
Vacaville, CA
Solano County
Rainwater harvesting is legal and encouraged in unincorporated Solano County. There is no county ordinance prohibiting rain barrels or cisterns; California law (the Rainwater Capture Act of 2012) permits residential rooftop capture without a water-rights permit. Under the County's adopted MWELO (Chapter 13.5), landscapes irrigated entirely with captured rainwater or graywater receive a streamlined compliance path.
View full Vacaville rules →Vallejo, CA
Solano County
Vallejo allows residential rainwater harvesting. California has no significant state-level restrictions on rainwater collection for personal use.
View full Vallejo rules →Key Facts Comparison
| Fact | Vacaville | Vallejo |
|---|---|---|
| County Ban | None - rainwater harvesting allowed | - |
| State Authority | Rainwater Capture Act 2012 (WC 10573+) | - |
| Water-Rights Permit | Not required for rooftop capture | - |
| WELO Benefit | Streamlined MWELO path if used | - |
| Permit Trigger | Large tanks / plumbing connections | - |
| Watch-Out | Cover tanks - mosquito nuisance | - |
| Restrictions | - | None for residential use |
| Permits | - | Large systems may need one |
| Potable Use | - | Treatment system required |
| Topic | - | Rainwater Harvesting |
Highlighted rows indicate differences between cities.
Vacaville FAQ
Can I install rain barrels in unincorporated Solano County?
Yes. There is no county ordinance prohibiting residential rain barrels or small cisterns, and California's Rainwater Capture Act of 2012 lets you capture rooftop rainwater for onsite use without a water-rights permit. Larger tanks or plumbing connections may need a building or plumbing permit.
Does harvested rainwater help with the county landscape ordinance?
Yes. Under the County's adopted MWELO (Chapter 13.5), a landscape under 2,500 square feet irrigated entirely with captured rainwater or graywater qualifies for the simplified prescriptive compliance pathway instead of the full water-budget documentation.
Vallejo FAQ
Can I collect rainwater legally?
Yes. California allows residential rainwater harvesting without significant restrictions.
Do I need a permit for rain barrels?
Standard rain barrels typically do not need permits. Large cistern systems may require building permits.
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