1. Rainwater Overflow Rainwater Captured & Used Potable Water Used Rainwater Harvesting: Cistern Performance Simulation Cistern Size (Thousands of Gallons) 1990-2010 Philadelphia Precipitation ( 40,000 sf roof ) Total Water (Millions of Gallons) 3,000 Gallons Per Day Used For Toilet Flushing (Projected Estimate) 12,000 Gallon Tank

2. Rainwater Overflow Rainwater Captured & Used Potable Water Used Rainwater Harvesting: Cistern Performance Simulation Cistern Size (Thousands of Gallons) 1990-2010 Philadelphia Precipitation ( 40,000 sf roof ) Total Water (Millions of Gallons) 4,000 Gallons Per Day Used For Toilet Flushing (Projected Estimate) 20,000 Gallon Tank

3. Rainwater Overflow Rainwater Captured & Used Potable Water Used Rainwater Harvesting: Cistern Performance Simulation Cistern Size (Thousands of Gallons) 1990-2010 Philadelphia Precipitation ( 40,000 sf roof ) Total Water (Millions of Gallons) 5,000 Gallons Per Day Used For Toilet Flushing (Projected Estimate) 35,000 Gallon Tank

4. Rainwater Overflow Rainwater Captured & Used Potable Water Used Rainwater Harvesting: Cistern Performance Simulation Cistern Size (Thousands of Gallons) 1990-2010 Philadelphia Precipitation ( 20,000 sf roof ) Total Water (Millions of Gallons) 1,500 Gallons Per Day Used For Toilet Flushing (Projected Estimate) 6,000 Gallon Tank

5. Rainwater Overflow Rainwater Captured & Used Potable Water Used Rainwater Harvesting: Cistern Performance Simulation Cistern Size (Thousands of Gallons) 1990-2010 Philadelphia Precipitation ( 20,000 sf roof ) Total Water (Millions of Gallons) 2,000 Gallons Per Day Used For Toilet Flushing (Projected Estimate) 10,000 Gallon Tank

6. Rainwater Overflow Rainwater Captured & Used Potable Water Used Rainwater Harvesting: Cistern Performance Simulation Cistern Size (Thousands of Gallons) 1990-2010 Philadelphia Precipitation ( 20,000 sf roof ) Total Water (Millions of Gallons) 2,500 Gallons Per Day Used For Toilet Flushing (Projected Estimate) 18,000 Gallon Tank