Are you curious about collecting rainwater but unsure if it’s legal where you live? While most states allow and even encourage rainwater harvesting, a few have some surprising restrictions and laws in place.
Why Rainwater Harvesting Matters
Before diving into state-specific regulations, it’s important to understand why rainwater harvesting is so valuable. Collecting and using rainwater offers numerous benefits:
- Reduces strain on municipal water supplies
- Lowers water bills for households and businesses
- Decreases stormwater runoff and associated pollution
- Provides a source of water during droughts or emergencies
- Promotes self-sufficiency and sustainable living
With water scarcity becoming an increasing concern, rainwater harvesting is a simple yet effective way for individuals to make a difference. By capturing the rain on our properties, we can conserve potable water for essential uses while maintaining lush gardens and landscapes.(ref)
Rainwater Harvesting System Basics
A typical rainwater harvesting setup consists of a few key components:
- Catchment surface (usually a roof)
- Gutters and downspouts to direct water
- Filters to remove debris
- Storage tank or cistern
- Distribution system (pumps, pipes, etc.)
Systems can range from a simple rain barrel connected to a downspout to large underground cisterns that supply water for indoor non-potable uses like toilet flushing. The size and complexity depend on the intended use of the harvested rainwater.
Proper design, installation, and maintenance are crucial for ensuring the safety and quality of harvested rainwater. Regularly cleaning gutters, filters, and tanks helps prevent contamination issues.(ref)
State Regulations to Know
Now, let’s see some of the most noteworthy state laws and rules around rainwater harvesting:
1. Colorado
Colorado was the only state where rainwater harvesting was completely illegal until 2016. Now, thanks to updated legislation, most homeowners can collect rainwater with some limitations:
- Maximum of two rain barrels with a combined storage of 110 gallons or less.
- Collected water can only be used outdoors on the property where it was gathered.
- Certain exempt well owners can collect in larger cisterns for indoor non-potable use with an application.
2. Oregon
Oregon allows rainwater harvesting but with some unique restrictions:
- Rainwater may only be harvested from roof surfaces.
- Collected water can only be used for non-potable purposes.
- Appropriate backflow prevention and permits may be required depending on the system.
3. Texas
Texas is one of the most supportive states when it comes to promoting rainwater harvesting:
- No state restrictions on rainwater harvesting.
- Offers tax exemptions and financial incentives for installing rainwater collection systems.
- Requires rainwater harvesting system technology on new state buildings.
- Encourages use of harvested rainwater for potable and non-potable indoor uses.
4. Ohio
Ohio allows rainwater harvesting but has certain requirements in place:
- Rainwater harvesting systems must follow the state plumbing code and be permitted.
- Collected rainwater can only be used for non-potable purposes like irrigation and toilet flushing.
- Appropriate backflow prevention devices must be installed.
5. North Carolina
North Carolina has emerged as a leader in promoting rainwater harvesting in recent years:
- Actively encourages the use of rainwater harvesting systems.
- Offers various incentives and tax credits for installation.
- Requires rainwater to be considered in the design of new state buildings.
- Provides extensive resources and guidance on rainwater harvesting for residents.
The Future Is Rainy
As more states recognize the many advantages of rainwater harvesting, laws and regulations are gradually evolving to support this eco-friendly practice. Even in areas with restrictions, there are often still opportunities to capture and utilize rainwater in accordance with the rules.
By understanding the regulations in your state and implementing rainwater harvesting best practices, you can start making a positive impact on both your wallet and the environment.
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Davin is a jack-of-all-trades but has professional training and experience in various home and garden subjects. He leans on other experts when needed and edits and fact-checks all articles.