In the north Indian River Lagoon, nitrogen pollutant loads increased from 348,400 pounds per year in 1943 to 454,208 pounds per year in 1995. In the same time period the central lagoon saw an increase from 1,064,700 to 1,971,300 pounds per year of nitrogen. The south lagoon saw similar large scale increases in nitrogen. The phosphorus pollutant load during that time period doubled in the north lagoon, tripled in the central lagoon, and fell in between in the south lagoon.