Livestock Feedlots and Hog Farms in Duplin County, North Carolina

The scale: one of the two largest hog-producing counties in the US

Duplin County is home to roughly 1.8 to 1.95 million hogs, spread across several hundred industrial-scale operations -- one widely cited figure puts it at 459 farms running open-air waste lagoons. Depending on the year and dataset (USDA NASS county estimates and news-reported figures show some genuine variance), Duplin trades the #1 spot nationally back and forth with neighboring Sampson County, which runs a similarly enormous inventory. Together, Duplin and Sampson counties hold close to half of North Carolina's entire hog population -- and, as a direct consequence, close to half of the waste it generates. North Carolina itself is consistently the second- or third-largest hog-producing state in the country, behind Iowa, and Duplin is a primary reason why.

The production model behind those numbers is what matters for a land buyer: North Carolina's hog industry is built almost entirely on contract growers raising animals for large integrators (Smithfield Foods and its hog-production arm, Murphy-Brown LLC, chief among them), using an anaerobic-lagoon-and-sprayfield waste system. Manure and urine are flushed from barns into open earthen lagoons, where solids settle and the liquid layer is periodically sprayed onto adjacent cropland as fertilizer. It's a decades-old, permitted system under NC Department of Environmental Quality animal-waste rules -- not something illegal or improvised -- but it produces the odor, fly pressure, and truck traffic that became the subject of the county's most consequential land-use litigation.

The 2018-2019 nuisance verdicts, and what actually happened on appeal

Beginning in 2014, roughly 500 plaintiffs filed 26 federal nuisance lawsuits against Murphy-Brown, LLC, Smithfield's hog-production subsidiary, over conditions near hog farms across eastern North Carolina, with several suits tied to operations in or near Duplin County specifically. Five of those cases were tried in federal court in Raleigh in 2018-2019, and Murphy-Brown lost all five. Verdicts included significant punitive damages: one trial awarded each plaintiff $75,000 in compensatory damages plus a collective $5 million in punitive damages (later reduced to $2.5 million under North Carolina's statutory punitive-damages cap); a separate case awarded a Duplin County couple more than $25 million; a fifth trial returned $420,000. These were real, substantial jury verdicts against one of the country's largest pork producers, not symbolic judgments.

On appeal, the outcome was more nuanced than a simple win or loss for either side. In McKiver v. Murphy-Brown, LLC (980 F.3d 937, 4th Cir. 2020), the Fourth Circuit Court of Appeals affirmed the underlying liability finding -- Murphy-Brown could be held liable for nuisance even while operating in compliance with state permits and following recognized industry practices -- but vacated and remanded the punitive-damages amount specifically, ruling it should be recalculated without considering the financial condition of Murphy-Brown's parent company or its executives. Shortly after that ruling, Smithfield and Murphy-Brown announced a global settlement resolving the remaining pending nuisance cases, ending the litigation wave rather than sending it back through further trials. Separately, a later federal summary-judgment ruling favored Murphy-Brown/Smithfield against roughly 20 additional plaintiffs pursuing trespass and negligence claims tied to a Duplin County site, showing that even short of the eventual statutory changes, not every subsequent claim succeeded.

The legislative response: why the Right to Farm Act changed

This litigation wave is the direct reason North Carolina's Right to Farm Act (G.S. § 106-700) was amended in 2018 and again in 2019, as covered on our North Carolina state hub. The amendments added real, substantive limits on who can bring a nuisance suit against a qualifying farm going forward: a plaintiff generally must be the legal possessor of property within a limited distance of the operation, must file within one year of the operation's establishment (or a fundamental change to it), and mediation is now generally required before a case can proceed to trial. Any local ordinance that would treat a compliant farm operation as a nuisance is void under the amended law.

The practical upshot for a buyer today: the specific legal pathway that produced the 2018-2019 verdicts is now much narrower. A new neighbor moving in next to a long-established hog operation faces a considerably steeper climb to bring a successful nuisance suit than the plaintiffs in the McKiver-era cases did, most of whom had lived near their respective farms for years or decades before the operations expanded or changed hog-waste practices. That does not mean legal exposure near a hog operation is zero -- it means the realistic risk profile for a buyer has shifted from litigation exposure toward the more everyday, non-legal factors below.

What a land buyer near an existing hog operation should actually check

• Proximity and prevailing wind direction relative to any permitted animal operation's barns and lagoons -- the NC Department of Environmental Quality maintains a permitted animal-facility database and GIS layer that can show nearby operations by name and permit type.
• Property-value effects: multiple published studies of eastern North Carolina housing markets have found measurable value discounts for homes near hog operations, particularly downwind or within roughly a half-mile to a mile of lagoons -- a real market factor independent of any lawsuit, and one an appraiser or comparable-sales search can help quantify for a specific parcel.
• Well-water quality, given documented regional concerns about nitrate and nutrient loading in groundwater near dense concentrations of lagoons and sprayfields -- test any existing well, and ask Duplin County Environmental Health directly about known issues in the immediate area before drilling a new one.
• Flood exposure for both your parcel and any nearby lagoon: Hurricane Floyd (1999) and Hurricane Florence (2018) both breached, overtopped, or inundated numerous eastern North Carolina hog lagoons, including in Duplin County, releasing waste into floodwaters -- a factor worth weighing alongside standard floodplain due diligence given the county's Coastal Plain flood history.
• Whether the nearby operation is a stable, long-established facility or one that has recently expanded or changed practices -- since the 2018-2019 Right to Farm Act amendments specifically preserve a nuisance claim's viability for a 'fundamental change' to an operation, even though the overall bar for a successful suit is now considerably higher.