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Tennessee: Laws & Legal Considerations

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Rainwater harvesting: no volume limits, no permit, anywhere in the state

Tennessee is among the most permissive states covered on this site for rainwater harvesting, with no state-level cap on how much a resident can collect.

RuleTennessee
Source water Rooftop or other catchment
Permit required No, at the state level, for any volume
Equipment/inspection requirements None imposed by the state
Potable use Requires treatment; not permitted for drinking without it
Local requirements Municipalities may impose their own codes; check locally

Chattanooga pays you back

The City of Chattanooga reimburses residents for the cost of installing rain barrels and other stormwater management features, a local incentive similar in spirit to Philadelphia’s rainwater subsidy program covered on Pennsylvania’s page.

Where to find it: the Tennessee Department of Environment and Conservation (tn.gov/environment) for state guidance; your municipality for local incentive programs.

Water rights: riparian reasonable use, with domestic needs prioritized even over downstream impact

Tennessee follows the same broad riparian reasonable-use family as most Southeastern states covered on this site, with one specific priority rule worth knowing.

ConceptHow it works in Tennessee
Who holds the right Landowners bordering a natural watercourse, with equal rights among riparian owners
Governing principle Reasonable use: each riparian owner may use water for domestic, agricultural, or manufacturing purposes without materially diminishing the flow available to others
Domestic/natural use priority Water needed for drinking, cooking, bathing, and watering essential livestock can generally be taken in full, even if it measurably affects downstream users
Regulatory trend Tennessee has moved toward "regulated riparianism," adding state statutes and agency oversight on top of the older common-law framework

Where to find it: the Tennessee Department of Environment and Conservation administers water resource regulation statewide.

Permitless carry since 2021, with a two-tier optional permit system

Tennessee has allowed permitless concealed and open carry since 2021, and unlike most other permitless states covered on this site, it offers two distinct optional permits rather than one.

RequirementDetail
Standard Permitless carry, open or concealed, for anyone 21+ (18+ for active-duty or honorably discharged military) legally eligible to possess a firearm
Enhanced Handgun Carry Permit (EHCP) Requires training; provides the broadest reciprocity with other states
Concealed Handgun Carry Permit (CHCP) Fewer requirements than the EHCP, but recognized in fewer states
Federal school zone exemption Constitutional carry alone does not satisfy the federal Gun-Free School Zones Act exemption; an EHCP or CHCP is required to legally carry within 1,000 feet of a K-12 school

Why the school zone detail matters in practice

This is the same kind of federal-versus-state gap noted on Arizona’s page: Tennessee’s own law doesn’t require a permit to carry, but federal law still restricts carrying near K-12 schools unless the carrier holds one of Tennessee’s two permit types specifically. Relying on permitless carry alone near a school risks a federal violation even where state law imposes no requirement at all.

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