Tennessee treats rainwater as the property of the landowner where it falls, allowing unrestricted harvesting without state-level permits or volume caps. Local rules may apply for large systems or potable use, emphasizing conservation through voluntary practices.
Ownership Rights
Landowners own rainwater on their property, with no riparian or prior appropriation doctrines claiming it for downstream users or the state. This common-law approach supports private collection for irrigation, livestock, or household needs without legal barriers.
Harvesting Regulations
No statewide restrictions exist; residents can install barrels, cisterns, or roofs freely, though filtration is recommended for non-potable uses. Cities like Chattanooga offer rebates for barrels, promoting stormwater reduction.
Conservation Laws
Tennessee’s Water Quality Control Act prioritizes pollution prevention over allocation, encouraging harvesting via guidance manuals for best practices. Large-scale users must report withdrawals over 10,000 gallons daily, but small domestic systems face no oversight.
SOURCES
[1](https://worldpopulationreview.com/state-rankings/rainwater-collection-legal-states)
[2](https://www.lawnstarter.com/blog/landscaping/rainwater-harvesting-guidelines-by-state/)
[3](https://www.ntotank.com/blog/rainwater-harvesting-laws-regulations-and-rights-by-us-state)
[4](https://4perfectwater.com/blog/is-rainwater-harvesting-legal-in-tennessee)
[5](https://www.twadboard.tn.gov.in/rain-water-harvesting-rwh)
