The City began its first sewer service in 1885 along the lower portion of Fifth and Sixth avenues in downtown with the raw effluent discharged into the bay. In 1943, the Navy built a treatment plant on East Harbor Drive to reduce health risks to sailors on ships in the bay. It was enlarged in 1950, but the growing population overwhelmed it. In 1963, the Point Loma Plant opened and now processes approximately 160 million gallons a day generated by 2.2 million residents in a 450 square mile area. It has a capacity of 240 million gallons per day.