Working with Arcadis, our team is designing a treatment process to optimize nitrogen removal at the York Wastewater Treatment Facility (WWTF) in York, ME. Coastal wastewater treatment facilities are facing stricter nitrogen limits in their NPDES (National Pollutant Discharge Elimination System) permits due to the impact of excess nitrogen on water bodies. High nitrogen levels contribute to eutrophication, leading to harmful algal blooms, oxygen depletion, and marine habitat degradation. In preparation for these regulatory changes, we are optimizing the aeration process by evaluating and implementing alternatives to achieve an effluent nitrogen concentration of 8 mg/L. Our design approach follows guidance from Metcalf & Eddy, TR-16 Guides for the Design of Wastewater Treatment Works, and NPDES permit requirements, ensuring compliance with industry standards while enhancing treatment efficiency.