COMBINED SEWER OVERFLOW NOTICE



Combined Sewer Overflow Notice

Combined Sewer Overflow Notice (posted 10/31/05)
A Combined Sewer System (CSS) is a wastewater collection system owned by a state or municipality which conveys sanitary wastewater and storm water through a single pipe system to a wastewater treatment plant.  A Combined Sewer Overflow (CSO) is the discharge from a CSS, normally occurring during a time of heavy rainfall.  CSO's consist of domestic sewage, industrial and commercial wastewater, and storm water runoff.

The City has three discharge points of CSO discharges.  These are located at a lift station on Johnson Street (discharge point 003), lift station located on Oak Street behind the City Garage(discharge point 004).  Whenever a CSO discharge occurs from one of these three discharge points, it will be posted with the date and location on the bulletin board of the City's website.

The City of Jacksonville has developed three separate plans required by the Illinois Environmental Protection Agency to ensure that during storm events water is treated to the fullest extent possible to remove any contaminants before entering Mauvaisterre Creek.  The three plans consist of:    
                                    CSO Operation Plant     
                                    Pollution Prevention Plan      
                                    Public Notification Program

The goals of these plans are to ensure the sewer system is operated and maintained in the most efficient manner possible, to reduce the toal laodings of pollutants and floatables entering the receiving stream, to ensure compliance with stream water quality standards, and that the public is notified when CSO discharges occur.

A Brief Overview Of Our CSO Plans Follows

  • The wastewater treatment plant for the City monitors and tests samples from all large industrial and high strength discharges in the system on a continuing basis.
  • A street cleaning program is in place and carried out by the City of Jacksonville Street Department.
  • City ordinances are in place prohibiting cut grass from being blown into the street.  Trash receptacles are present in high pedestrian traffic areas within the city limits and near highly concentrated business areas.
  • There is a curbside recycling program in place in the City and has been since August 1992.
  • No dumping signs are posted throughout the City at bridges and known illegal dumping areas.  The local Police Department and the Street Department monitor these areas.
  • Waste tire collections have been conducted in 2003 and 2005.  A hazardous waste collection was sponsored by the Illinois EPA in 2002.  A City wide clean up is conducted yearly in June to collect large bulk items to be discarded.
  • A dedicated three-man crew is responsible for all collection system maintenance.  The City of Jacksonville owns a Myers hydraulic flusher truck and also a 1995 Vactor 2100 vacuum/hydraulic flusher truck that are used for routine maintenance and any emergency blockages in the collection system.
  • All dry weather flows and first flush flows are given full secondary treatment through the wastewater plant.  The CSO facilities at the wastewater plant have a total first flush capacity of 1.2 MG which are drained to the wastewater plant between storm events as quickly as possible when practical.
  • The lift station on Oak Street is capable of pumping 117.73 MGD of which 35.4 MGD is given first flush and primary treatment.  Flow from the lift station on Johnson Street equals 55.35 MGD of which 34.33 MGD are given first flush and primary treatment.  All CSO pumps and equipment are included in our routine preventative maintenance program.  Stored flows are returned to the treatment system for full secondary treatment within a maximum of 3 days after a storm event.
  • Mechanical rakes are installed at each CSO overflow.  A 2.79 MG Clarifier gives primary treatment to all CSO flows through CSO outfall 004.
  • Maximum treatment capacity of the wastewater treatment plant is 15 MGD.
  • All known problem areas in the collection system are checked routinely.  All other areas of the collection system are checked periodically.  The City street department owns a truck that is used for catch basin cleaning on a regular basis.  The utility Vactor truck is also used to clean catch basins when needed.
  • Trunk and interceptor sewers are cleaned on a routine basis with the Vactor hydraulic flusher truck where bottlenecks are known to be present in the system.
  • Public notification of CSO discharges from outfall numbers 002,003, and 004 shall include:        
  1. Posting of signs at points of discharge alerting the public that these waters may be impacted by CSO discharges during heavy rainfall events.
  2. Dates of CSO discharges posted on the City's website.
  3. Notification to residents along Mauvaisterre Creek of CSO discharges.              

The City of Jacksonville had CSO discharges on the following dates:

North Main (discharge point 004):

April 14, 2018 - 24 hours
April 29, 2017 -  7 hours

April 30, 2017 - 24 hours
May 1, 2017 - 24 hours
May 2, 2017 - 8 hours
May 3, 2017 - 12 hours
May 4, 2017 - 12 hours
May 20, 2017 - 24 hours
May 21, 2017 - 24 hours
August 24, 2018 - 21 hours
August 29, 2018 - 3 1/2 hours
September 7, 2018 - 5 hours 15 minutes
September 8, 2018 - 24 hours
September 9, 2018 - 12 hours 30 minutes
December 31, 2018 - 10 hours

January 1, 2019 - 19 hours
March 9, 2019 - 7 1/2 hours
March 10, 2019 - 24 hours
March 11, 2019 - 7 hours
May 1, 2019 - 20 hours
May 2, 2019 - 24 hours

May 3, 2019 - 24 hours
May 4, 2019 - 24 hours
May 5, 2019 - 6 hours
May 22, 2019 - 23 hours
May 23, 2019 - 24 hours
May 24, 2019 - 19 hours
June 22, 2019 - 20 1/2 hours
June 23, 2019 - 19 hours
January 11, 2020 - 24 hours
April 25, 2020 - 11 hours
April 26, 2020 - 24 hours
April 27, 2020 - 4 hours
April 29, 2020 - 4 hours
April 30, 2020 - 24 hours
May 17, 2020 - 9 1/2 hours
May 18, 2020 - 24 hours
May 19, 2020 - 23 hours
March 18, 2021 - 16 hours
March 19, 2021 - 19 hours
May 17, 2021 - 9 hours
May 18, 2021 - 24 hours
May 19, 2021 - 24 hours
May 20, 2021 - 15 hours
June 25, 2021 - 20 hours
June 26, 2021 - 24 hours
June 27, 2021 - 24 hours
June 28, 2021 - 24 hours
June 29, 2021 - 24 hours
June 30, 2021 - 24 hours
July 1, 2021 - 24 hours
July 2, 2021 - 7 hours
October 24, 2021 - 16 hours
October 25, 2021 - 24 hours
October 26, 2021 - 24 hours
October 27, 2021 - 1 hour
October 28, 2021 -  6 hours
October 29, 2021 -  4 hours
February 22, 2022 - 14 hours