The Maryland Department of the Environment has determined that Darling Ingredients' rendering plant in Linkwood, Dorchester County is in "significant noncompliance" with its pollution limits and discharge permit requirements. Darling Ingredients officials have largely pushed back on those allegations, but the paper trail of violations tells another story.
The finding adds another chapter to a long and troubled compliance history at the Eastern Shore facility, which processes roughly 4 million pounds of poultry byproducts (entrails, feathers, bones) into pet food each day. The plant has operated under a state consent decree since 2022, originally entered into after Darling's predecessor, Valley Proteins, racked up more than 40 discharge permit violations.
"The amount of pollution and permit violations here is staggering," said Alan Girard, the Chesapeake Bay Foundation's Maryland advocacy director.
The violations involve the facility's wastewater lagoon system, which is required to maintain at least two feet of freeboard (empty capacity) to prevent overflow during rain events. Inspection records showed both lagoons fell out of compliance for extended stretches, and the company failed to report the exceedances to the state as required. MDE fined Darling $15,000 in 2024 after finding 51 violations tied to the same freeboard requirement between August 2023 and March 2024.
Environmental groups including ShoreRivers and the Chesapeake Bay Foundation previously succeeded in overturning a permit that would have allowed the facility to nearly quadruple its daily wastewater discharge, from 150,000 gallons to 575,000 gallons per day. A revised permit is on hold while state studies determine new nutrient and sediment limits for the Transquaking River watershed, with a finalized permit not expected until early 2028.
Darling Ingredients, a Texas-based company that acquired the Linkwood plant as part of a $1.1 billion deal for 18 rendering facilities, has said it will respond through legal channels. The company has completed some wastewater treatment upgrades required under the consent decree, but neighbors continue to report persistent odor complaints, and regulators are not satisfied with overall compliance.
For brokers and traders sourcing animal fats, the ongoing scrutiny at Linkwood is a reminder that rendering compliance is increasingly a supply chain variable, not just an environmental footnote. Collectors, haulers, and processors operating near facilities under consent decrees may face tighter permitting conditions and supply disruptions as state regulators ratchet up enforcement.
