Mosaic Fertilizer Fined Over Safety Violations at Louisiana Plant
Mosaic Fertilizer and Tampa Port Services face a federal fine exceeding $100,000 for safety violations related to an ammonia release. This incident marks a recurring safety issue at the St. James Parish complex, raising concerns over operational integrity and worker safety.

Mosaic Fertilizer and Tampa Port Services have agreed to pay a fine of $103,449.50 to settle federal safety violations after an accidental release of anhydrous ammonia on October 27, 2025, which exposed workers to hazardous vapors. This incident follows a previous settlement in January 2024, where the companies paid $217,085 for similar violations regarding mechanical integrity.
The recent release was exacerbated by a pressure relief valve that was incorrectly set, resulting in the emission of over 673 pounds of ammonia, exceeding allowable limits. The companies are under ongoing scrutiny due to a history of multiple safety breaches dating back to 2022, with state investigations still pending. Continued operational failures could lead to stricter regulatory oversight and impact public health.




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