Water Treatment Facility PhotoInfrastructure is key for attracting and retaining businesses and industries.  Along with roads, and drinking water; wastewater conveyance and treatment completes the trilogy of City provided infrastructure components.  In addition, reliable and effective wastewater treatment is vital for protecting the Tippecanoe River and Lake Freeman.

The Wastewater Utility maintains and operates over 36 miles of storm and sanitary sewers, multiple pump stations, and a Class III wastewater treatment plant that is in the process of its third major upgrade since it was originally built in 1950.  The treatment plant’s latest upgrade increases its capacity from an average daily flow of 1.1 million gallons per day (MGD) to 1.6 MGD and increases its peak hydraulic capacity from 2.4 to 3.6 MGD.  The updated treatment process is a state of the art system consisting of fine screening, grit removal, a modified, activated sludge system capable of enhanced biological phosphorus removal and total-nitrogen reduction in addition to conventional reductions of oxygen demanding substances and ammonia.  Resource recovery is a high priority at the utility with an emphasis placed on energy reduction and nutrient reclamation land application of biosolids that are removed from the wastewater, thoroughly processed and tested at the facility, and then used as soil amendments and fertilizer supplementation on local agricultural grounds.

The City of Monticello is one of many Indiana communities that has a Combined Sewer System that overflows during heavy rain and snow melt events.  These overflows are known as Combined Sewer Overflows (CSOs) and the City is aggressively working to reduce and eliminate these CSOs thorough its Agreed Order with the Indiana Department of Environmental Management and the continued implementation of its Long Term Control Plan (LTCP).  The current upgrade at the treatment plant is Project III of V of the LTCP.

Common Issues & Questions:  Click at a question below to review the answer.

1. I am a customer of the Twin Lakes Regional Sewer District, am I in the right place?

No, the City of Monticello operates the wastewater system that is generally within the corporate boundaries of the City.  If you have a question or problem with your system and are a customer of the Sewer District, please contact them at: 574.583.5649

2. I believe I have sewage backing up into my basement or coming out of the cleanout in my yard; what should I do?

The City takes backups and overflows very seriously, if you believe you are experiencing a backup of overflow:
  1. If during business hours, contact the billing office at: 574.583.5443  
  2. If outside of business hours, contact the NON-EMERGENCY line for the Monticello Police Department at 574.583.2256
Please be prepared to give your name, the service address, a phone number you can be contacted at, and a description of the problem and any observations.

What happens then?

City personnel will respond to investigate the problem as soon as possible and attempt to determine whether the problem is under the jurisdiction of the City.  If the problem is with the City sewers, City personnel will attempt to correct the issue quickly and with the minimum amount of hassle possible.  If the City owned sewers are verified to be clear, the problem is considered to be the responsibility of the home owner and a local plumber may need to be consulted.  The City cannot give recommendations regarding plumbing services.

3. What determines CITY responsibility vs. HOME OWNER responsibility?

In general, the owner is responsible for the sewer lateral as it exits the home or building all the way to the point at which it connects to the sewer main, regardless that the sewer main is typically located in the street and within the Right-of-Way; as such, it can generally be said that if wastewater is freely flowing at the up- and downstream manholes, any issues are with the owner’s system.  Please contact the Wastewater Utility before attempting to repair private laterals located within the City Right-of-Way, while the City cannot repair all issues with privately owned sewers, exceptions are made on a case-by-case basis within the Right-of-Way in order to minimize the overall cost to the community.

4. I have other complaints, who should I contact?

General questions and complaints should be sent to This e-mail address is being protected from spambots. You need JavaScript enabled to view it or directed to the treatment plant at 574.583.4651 during regular business hours.

5. I would like to learn more about CSOs and what the City is doing about them, who should I contact?

General questions and complaints should be sent to This e-mail address is being protected from spambots. You need JavaScript enabled to view it or directed to the treatment plant at 574.583.4651 during regular business hours.

6. What are the operating hours of the Utility?

Billing Office hours are Monday through Friday, 8:00 A.M. to 4:00 P.M. except on City recognized holidays.  The treatment plant operates on a 24-hour basis but plant operators are often not readily near the telephone and able to answer general calls.

7. As a contractor or developer, how can I get information as to City Construction Standards?

Construction Standards for the design and construction of sewers, watermains, and streets are available at the following link: (2/2017 - To Be Announced.  Please return at a later date for new information)  It is the developer’s responsibility to conform design and construction to the latest revisions of these standards.

8. As a contractor or developer, how should I begin the process to get my designs approved and permitted?

Plans and specifications for your project are required to be submitted for review and approval through (2/2017 To Be Announced.  Please return at a later date for updated information.) and will then be forwarded to the City for review.  Please keep in mind that any sanitary sewer extensions or pump stations that will be turned over to the City of ownership and maintenance may require permitting through the Indiana Department of Environmental Management.  Please contact the utility at This e-mail address is being protected from spambots. You need JavaScript enabled to view it if you have questions regarding these requirements.

9. I am ready to have my constructed project inspected, who should I contact and when?

Inspection requests should be submitted to This e-mail address is being protected from spambots. You need JavaScript enabled to view it no less than 48-hours prior to the desired inspection time and may or may not require delays of up to seven (7) business days depending on City personnel schedules.  It is the Owner’s responsibility to contact the Utility as early as possible and maintain a schedule that will allow for City inspection.  Failure to allow inspection may result in rejection of work completed and require additional work to expose existing installations or complete reinstallation of the work at the Owner’s cost.  In general, the City will inspect projects continuously during the work but with limited staff, immediate response to projects is not always possible.

No CSO Alert

Check here for community alert about current CSO (combined sewer overflow) status:

No CSO's are bypassing at this time.

At A Glance - Wastewater

Wastewater Treatment Plant
705 East Street
Monticello, IN 47960
Phone:  574-583-7847
Fax:  574-583-5697

D. Adam Downey, MS - Superintendent
wastewater@monticelloin.gov

Utilities Business Office
225 North Main Street
Monticello, IN 47960
Phone:  574-583-5443
Fax:  574-583-9244

After Hours: 574-583-2256

Helpful Links

Click to access our document library or click at these web links, pages, and documents.

Paying Your Sewer Bill
Current Sewer Rates (PDF)
What is Combined Sewer Overflow (CSO)?