The best available third-party data on land use/land cover, population statistics, atmospheric deposition rates, on-site
wastewater systems, sewage treatment plant outputs, and fertilizer application rates were analyzed using the Nitrogen
Loading Model (NLM) to compare nitrogen loads from wastewater, fertilizer, and atmospheric deposition sources to the
Peconic Estuary as a whole and as contributed by forty-three individual subwatersheds.