City of Springfield, Illinois - Water Division

General Information:

Number of Customers:  56,000

Population Served:  156,000

Communities Served:  Retail: Springfield, Rural Springfield, Southern View, Leland Grove.  Wholesale: Rochester, Chatham, Loami, Grandview, Jerome, Williamsville-Sherman Water Commission, Sugar Creek Public Water District.

Water usage:  Residential sales (estimate with 5/8” & 3/4” meters): 4,006,993 units/yr.

 (1 unit = 100 cu.ft.= 748 gallons).  All other retail usage = 4,057,881 units/yr.

 Wholesale sales: 1,013,744 units/yr. Company Use: 237,207 units/yr. Unaccounted: 12.2 %.

Source of Water:  Lake Springfield, South Fork of the Sangamon River

Sanitary District Average Daily Discharges:

     Sugar Creek Plant:  5 MGD

     Spring Creek Plant:  20 MGD

Current Demands:    

Current demand:  22 MGD

Peak Day of Record:  39.7 MGD (treated);  39.0 (delivered) - July 23, 1999

Current capacity:

   Source of Supply:  Full system, average conditions:  >70 MGD

                                  18-month, 100-yr drought, year 2025:  30.3 MGD

   Treatment:  43 MGD

Last major expansion:  Conversion of Clarifier #2 from a Spaulding precipitator to Claricone technology, 6 MGD to 10 MGD for this clarifier.

Growth trends:

   Addition of 546 new water services per year for last ten years.

   Per capita water use (gal./per capita/day): year 1990 – 137; year 2000 - 140, year 2007 - 145

Future Plans:

Water Demand Projections: See Exhibit A.

Need for additional source of supply:  Yes.  Looking for 10-12 MGD

Need for Plant infrastructure improvements and distribution replacements and upgrades.

Conservation:  Previous changes in the plumbing code and voluntary home plumbing retrofits have been primary focuses.

Large industrial users: Addition of Dallman 4 Power station in Springfield will demand 2.2 MGD, which will be offset by the retirement of the Lakeside units and the gain of 2.2 MGD.