Contact Us

Sedalia City Hall
200 South Osage Ave.
Sedalia, MO 65301
(660) 827-3000

Hours of Operation
8:30 AM - 5:00 PM

Water Pollution Control 

Wastewater System

The Water Pollution Control Division is responsible for managing the City of Sedalia's wastewater system.  This responsibility requires protection of public health and minimizing the impact to the  environment by adequately collecting and treating wastewater generated by properties within the City’s corporate city limits and areas outside the City that are connected to the City’s system. The wastewater system consists of three wastewater treatment facilities and a compost facility.  These 4 facilities serve the North, Central and Southeast portions of the City respectively and the compost facility manages the biosolids from all 3 wastewater treatment facilities.

The North Wastewater Treatment plant is located at 23985 Georgetown Road.  This plant serves the north portion of the City, including the downtown area as well as north of Main Street.  This plant is a 2.5 million gallon per day trickling filter plant.  This facility serves, not only residents, but also many of Sedalia's industrial and manufacturing businesses.  The wastewater treatment plant is operated under the Missouri Department of Natural Resources National Pollutant Discharge Elimination System (NPDES) Permit #MO-0023027. The facility was constructed in 1946, updated in 1966 and includes two trickling filters, settling tanks, a sludge digester, belt filter press and sludge storage.  The plant on average processes 1.3M gallons of wastewater per day.

The Central Wastewater Treatment plant is located at 3000 W. Main Street. This plant serves the west portion of the City, including most of the commercial properties west of Hwy 65.  This plant is a 3.0 million gallon per day activated sludge plant.  This facility serves mostly commercial businesses and industrial plants. The wastewater treatment plant is operated under NPDES Permit #MO-0023019.  The facility was originally constructed in 1949, but was updated in 2001 when it was converted to an activated sludge facility.  Sludge is digested and dewatered on a belt filter press.   The plant on average processes 1.9M gallons of wastewater per day.

The Southeast Wastewater Treatment plant is located at 26999 Goodwill Chapel Road.  The plant was constructed in 1985 and is an activated sludge facility with interchannel clarifiers designed to treat 2.6 million gallons per day (MGD) with an existing average daily flow of about 1.8M gallons per day. The wastewater treatment plant is operated under NPDES Permit #MO-0101567.  The facility serves all properties located south and east of the Katy Trail, as a result the facility serves most of the residential properties located within the City. 

The City’s Compost Facility is located at the City’s Materials Management Site at 27882 Highway “U” and has been in operation since 2010.  Sludge from all three wastewater treatment facilities is taken to the City’s biosolids compost facility. The facility composts wastewater biosolids along with the materials collected at the yard waste drop-off site to produce a Class A composting material. (Note: The City, through its’ NPDES permits, also maintains the permit authority to land apply sludge as an alternative disposal method.)  The process used is static pile aeration and is computerized.  The computer system used results in staffing being kept to a minimum as staffing is used for system monitoring, mixing, putting materials into rows and separating materials.  The composting process needs to progress at a predictable rate under ideal microbial conditions so that a high quality product is produced in the minimum amount of time meeting applicable federal and state requirements.

Water Pollution Control also manages the collection system which consists of 133 miles of gravity sanitary sewer mains, 4 miles of force mains, approx. 2,300 manholes, and 15 lift stations.  Maintenance of the collection system involves cleaning and inspections, repair, and rehabilitation. 

Sewer Back-up - Call Us First

The Water Pollution Control Division (Sewer Utility) provides 24-hour on-call service, seven days a week. If you are experiencing a sanitary sewer backup problem call us at (660) 619-2996 and (660) 619-5325. We will check to determine if there is a problem in the City’s sewer main that may be causing your problem. By calling us first, you may save yourself a plumbing bill. 

Common Causes of Sewer Obstructions

  • Disposable wipes, rags and feminine products do not break down, dissolve or degrade and may remain in your home’s sewer lateral line causing a back-up.While many of these products indicate on the face of the package that they are flushable, please confirm by reading the back of the package and dispose of these items per those instructions.

  • Fats, oils and greases are some of the primary causes for sewer back-ups and potentially sanitary sewer overflows.Fats, oils and greases often turn sticky once released into a drain and can build up over time in sewer pipes eventually blocking off the entire pipe.Properly dispose of fats, oils and grease and do not dispose of them by pouring into the sewer (i.e., drains, floor drains, or toilets).

  • Tree roots -- when planting trees and bushes, locate the sewer lateral line running from your home to the City’s sewer main and avoid planting in that area, so that roots do not grow into your sewer lateral line during drought or dry periods.
    The City has a chemical root control program used in the City’s mains.  The root control program uses a chemical treatment to control the growth of roots within and through the City’s sewer mains. Usually roots enter the pipe through cracked joints, especially in areas where clay sewer pipe remain in service. Once inside the pipe, the root can further damage the pipe by creating offsets, increasing the size of the crack which ultimately reduces the lifespan of the pipe or by causing blockages when grease or other materials becomes trapped in the roots.  The chemical root control program has been developed and a schedule implemented to address those areas of the sewer system known to experience tree root problems or monitoring of CCTV videos new areas of concern (i.e., where current tree root growth in sewer mains has been observed).

  • Sewer lateral failure -- service connections are the responsibility of the property owner. When a connection inside the residence or business or from the residence or business to the City’s main is determined to be in need of repair, the property owner is advised that repairs are needed. The sewer utility is not responsible for repairing private property sewer lateral connections.

  • Obstructions in a sewer structure or main may also be due to a structural failure, roots, or a buildup of grease or rags. These problems can be identified and corrected by Water Pollution Control staff.Obstructions which cause a sewer back-up into a business or residence are classified as top priority for investigative and follow-up preventive maintenance measures. This priority is given to assure that a subsequent obstruction does not occur due to the same source. Corrective measures may include routine cleaning on an established schedule or dig-up and repair of the pipe, if warranted.Obstructions which cause wastewater to overflow from a sewer structure and do not cause personal property damage are placed on a lower priority repair schedule, or on a routine cleaning/inspection schedule.

  • Surcharged mains occur not from an obstruction, but result from heavy or prolonged rainfall which may cause the sanitary sewer main to fill due to infiltration and inflow (I&I) of stormwater into the sanitary sewer system.Inflow is stormwater that enters the sanitary sewer system directly through connections such as roof downspouts, driveway drains, sump pumps, and cross-connections with storm drains.Peak inflow can occur during heavy storm events or snow melts causing sewer surcharges resulting in overflows and basement backups.Infiltration is groundwater or rainwater that enters sanitary sewer pipes and structures through holes, breaks, joint failures, connection failures or other openings. The volume of infiltration often reflects seasonal variations as a result of groundwater levels following prolonged periods of precipitation.While much work has been done towards reducing I&I from the sanitary sewer system, some areas of the community continue to experience problems. Property owners can take preventive measures to prevent backups from surcharged mains into the property.

Stormwater System

The City of Sedalia has developed a Stormwater Management Program that is designed to reduce the discharge of pollutants into local streams and waterways to the maximum extent possible.  It is also the city’s intent to protect water quality and to satisfy the appropriate requirements of the Clean Water Act in accordance with the Missouri Department of Natural Resources Phase II Program.

Sedalia has sixteen storm water outfalls discharging into the waterways of Missouri.  The waterways that are directly impacted by the city’s stormwater discharge are Cedar Creek, Shaver Creek, Flat Creek, Muddy Creek, Coon Creek, and Brushy Creek.  Water leaving Sedalia’s stormwater outfalls is not treated before exiting the system and impacts the water quality of countless streams, lakes and rivers statewide.   

In 2003, the City of Sedalia was issued a General State Operating Permit for the Stormwater Phase II MS4. Sedalia is working towards the goal of reducing stormwater pollution pursuant to the Federal Water Pollution Control Act and in compliance with the Missouri Clean Water Law. 

Public Works Review of Development Plans for Stormwater Impacts

Public Works Project Managers work closely with the City’s consulting engineer on the design and construction of community-approved infrastructure projects in the Capital Improvements Program (CIP). This includes survey, design, easement acquisition, contracting and construction inspection.

Public Works Department staff is responsible for assisting in the implementation of the Municipal Separate Storm Sewer System (MS4) permit issued by the Missouri Department of Natural Resources to the City of Sedalia.  As part of this effort, Public Works staff review and provide comment on engineering plan submittals, perform stormwater outfall inspections, investigate reports of potential illicit discharges to the stormwater system, inspect stormwater control structures and respond to stormwater complaints.

Stormwater Capital Improvement Planned Projects

Stormwater Management Plan

The City has developed a Stormwater Management Plan to address the six minimum control measures required by the Missouri Department of Natural Resources. These are: 

  1. Public Education and Outreach
    Distribute educational materials and conduct outreach to inform citizens about the impacts that stormwater runoff has on water quality.

  2. Public Involvement/Participation
    Provide opportunities for citizens to participate in the stormwater management program or other programs which improve water quality. 

  3. Illicit Discharge Detection and Elimination
    Develop and implement a plan to detect and eliminate non-stormwater discharges into the stormwater system.

  4. Construction Site Stormwater Runoff Control
    Develop, implement and enforce an erosion and sediment control program for construction site activities that disturb one acre or greater.

  5. Post-Construction Stormwater Management
    Develop, implement and enforce an erosion and sediment control program for construction site activities that disturb one acre or greater.

  6. Pollution Prevention/Good Housekeeping
    Develop and implement a program that reduces or prevents pollutant runoff from municipal operations.

These minimal control measures, when combined, will help maintain cleaner water in the City of Sedalia and surrounding areas.

The Missouri Department of Natural Resources’ General Permit may be viewed at:

Stormwater Pollution Problem or Suspected Illicit Discharge Report

Stormwater flows across the land and soaks into the ground or runs into our storm drains eventually flowing to our waterways. When rain falls on your yard or street, it carries pollutants to the nearest storm drain. The storm drains carry the stormwater mixed with pollutants directly to our creeks and waterways. Examples of pollutants that threaten our waterways are fertilizers and pesticides, soaps and detergents, vehicle fluids (motor oil, gasoline, anti-freeze, fuels), paints, solvents, pet waste left on the ground, grease, sewage, trash and debris. Everyone can help reduce pollutants entering our waterways by being aware of these pollutants and working to reduce their use and inappropriate disposal.

Spills and/or Discharge

A spill is any release of material that threatens human health or the environment. An illicit discharge is any discharge to the City's stormwater system that is not composed entirely of stormwater, except discharges that are allowed by City Code or permit.

Reporting Suspected Illicit Spills and/or Discharges

If you see oil, antifreeze, paint or any other questionable material being spilled or intentionally dumped on the roadway, into a catch basin or into a stormwater drain, contact (660) 827-7830 or to get more information about the City’s Stormwater Program call (660) 827-3000 ext. 1166.

Stormwater Information

The City of Sedalia has been
     a proud member of the
    Groundwater Guardian
    Community since 2005.

Additional Links

Contact Information

Operations Manager:
Bob Summers

Water Pollution Control
201 S. Marvin Ave.
Sedalia, Missouri  65301
Phone:  (660) 827-7830
(660) 827-7834

Hours of Operation:
7:00 a.m. - 3:30 p.m.
Monday - Friday