Sewer
Authority
Sewer
The ICC currently regulates three investor-owned public utilities that provide sewer (or wastewater) service:
Aqua Illinois Inc.
Illinois-American Water Company
, and
Prairie Path Water Company
List of Certified Sewer
Certified Sewer
Notice of Inquiry
There are no open Notices of Inquiry (NOI) pertaining to Illinois sewer public utilities at this time. Click on the NOI button below to view all ongoing and closed NOIs
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Programs and Initiatives
Office of Diversity and Community Affairs
One-Call Enforcement
Uniform System of Accounts
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Informal Processes
There are no open informal processes for this authroity at this time. View the list of informal processes to see any all open and archived informal processes.
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Forms
Form 22 ILCC - Annual Report of Water and/or Sewer Utilities
External User Account Request Form
Gross Revenue Tax Return for Public Utilities and Rail Carriers
U-1 Accident Report Form
U-2 Accident Report Form
U-3 Accident Report Form
Simplified Rate Case Form
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Industry Reports
Credit, Collections, and Arrearages Reports
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Reporting Requirements
NOTICE: The information on this page is provided only as a convenience to the reader and does not necessarily represent the full extent of a company's reporting obligations under the relevant statutes and rules. It is the responsibility of the service provider to determine and comply with the applicable reporting requirements.
Report
Sewer
Annual Reports
Due: Annually March 31st
83 Ill. Adm. Code 210.30
220 ILCS 5/5-109
83 Ill. Adm. Code 210.30 Check List
Form 21 ILCC - Annual Report of Electric Utilities Licensees and/or Natural Gas Utilities
Form 22 ILCC - Annual Report of Water and/or Sewer Utilities
Form 23A - Annual Report - Incumbents
Form AR-13 - Annual Report of Certain Telecommunications Carriers
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Designated Agent Report - Annual Filing
Due: Annually after January 1 and before January 31st
83 Ill. Adm. Code 215.10(a)
83 Ill. Adm. Code 215 Instructions
Designated Agent Report
Due: 15 days after any change to the DA
83 Ill. Adm. Code 215.50
83 Ill. Adm. Code 215 Instructions
Accident Reporting
Due: Occurrence Based
83 Ill. Adm. Code 220.10
83 Ill. Adm. Code 220.20
U-1 Accident Report Form
U-2 Accident Report Form
U-3 Accident Report Form
Report of Issuance and Sale or Disposal of Securities and Application of Proceeds
Due: Quarterly until company’s Final Report is issued
83 Ill. Adm. Code 240
Reporting of suspected violations of Damage Prevention Act
Due: Within 45 days of occurrence
83 Ill. Adm. Code 265.100(b)
Implementation Plan
Due: January 1st, 2015, and every 120 days after initial approval
83 Ill. Adm. Code 280.15
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Public Utility Electronic Tariff Filing
Due: Occurrence Based
83 Ill. Adm. Code 290.70
Code Part 290 Instructions
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Informational Packets(Right-of-Way Acquisitions)
Due: Prior to Contact with Landowner
83 Ill. Adm. Code 300.20
Money Pool Agreements
(3)
Due: Quarterly
83 Ill. Adm. Code 340.60
Water Purchased Water or Sewer Treatment Rider - Reconciliation
Due: Annually, March 31st
83 Ill. Adm. Code 655.50
Public Utilities Fund Tax (PUF Tax) (Annual Gross Revenue Tax Return)
Due: Annually by March 31st
220 ILCS 5/2-202
Gross Revenue Tax Return for Public Utilities and Rail Carriers
Annual Security Policy Affidavit
Due: Annually
220 ILCS 5/4-101
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Credit, Collections and Arrearages Annual Reporting
Due: Annually May 1st
220 ILCS 5/8-201.10 (a)
Instructions for 220 ILCS 5/8-201.10
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Credit, Collections, and Arrearages Monthly Reporting
Due: Monthly - 15th each month beginning October 15, 2021
220 ILCS 5/8-201.10 (b)
Instructions for 220 ILCS 5/8-201.10
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Annual Non-Utility Supplier Diversity Reports
Due: Annually June 1st
220 ILCS 5/16-111.11
2025 Supplier Diversity Report Form
Instructions
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(3)
Only required for Utilities that serve more than 100,000 customers.
NOTICE: The information on this page is provided only as a convenience to the reader and does not necessarily represent the full extent of a company's reporting obligations under the relevant statutes and rules. It is the responsibility of the service provider to determine and comply with the applicable reporting requirements.
ICC Reports
Ameren IL Wind and Ice Storm Preparedness and Restoration Investigation
Annual Report on Electric, Gas, and Water Sewer Utilities
[220 ILCS 5/4-304]
Arbitrators
[83 Ill. Adm. Code 202.220(e)]
Consumer Services Annual Report
Directory of Water and Sewer Utilities
HJR 59 Cybersecurity Task Force
ICC Staff Report on Utility Customer Disconnections, Credit, and Collections: 2022 – 2023
[220 ILCS 5/8-201.10(b)]
ICC Staff Report on Utility Customer Disconnections, Credit, and Collections: 2022 – 2024
Rate Case History Report
September 3, 2025 Staff Report
Sewer Rate Comparisons
Supplier Diversity Annual Report
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