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Rates and Riders

On May 13, 2021, the Illinois Commerce Commission (ICC) issued Final Order 20-0606 regarding Nicor Gas’ proposed revenue-neutral tariff filing.  

This Order is the result of an 11-month proceeding before the ICC in which the Company proposed several changes to its Transportation program to preserve the operating integrity of Nicor Gas’ storage fields for the long-term and treat all on-system storage users in a similar fashion. The Company will communicate the changes being made as a result of the order as the effective date approaches. 

General Rate Plans

General Service

Rate 4 is appropriate for commercial and industrial customers ranging from small users to those with annual use less than 800,000 therms. Rate 4 customers purchase all natural gas supplies from Nicor Gas.

Firm Transportation Service

The customer profile described for Rate 4 is the same with Rider 25, however, these customers arrange for purchases from another source and contract with Nicor Gas for storage and 100 percent backup service.

Changes to Rider 25

General Transportation Service

The customer profile for Rate 74 is the same as Rate 4, however, customers arrange for purchases from another source and contract with Nicor Gas for varying storage and firm backup options. Rate 74 is one of our "unbundled" rates because customers can select storage and backup levels.

Seasonal Use Rates and Riders

Seasonal Use Service

Rate 5 is appropriate for commercial and industrial customers with annual use less than 700,000 therms and with winter period use totaling no more than 5 percent of annual usage. Rate 5 customers purchase all natural gas supplies from Nicor Gas.

Firm Transportation Service

The customer profile described above in Rate 5 is the same when added with Rider 25, however, these customers arrange for purchases from another source and contract with Nicor Gas for storage and 100 percent back up service.

Changes to Rider 25

Seasonal Use Transportation Service

The customer profile is the same as Rate 5, however, customers arrange for purchases from another source and contract with Nicor Gas for varying storage and firm backup options. Rate 75 is one of our "unbundled" rates because customers can select storage and backup levels.

Large Volume Commercial and Industrial Options

Large General Service

Rate 6 is economical for large commercial and industrial customers with annual loads greater than 800,000 therms and high load factors. This rate has a minimum monthly bill of $3,500, excluding gas costs. Customers purchase all natural gas supplies from Nicor Gas.

Large Volume Service

Industrial customers with a monthly use greater than 800,000 therms may find this rate most economical. Rate 7 has a minimum monthly bill of $8,900, excluding gas costs, and is dependent on load factor. A detailed analysis by the customer account executive can determine whether Rate 6 or 7 is more appropriate.

Rates 6 and 7 with Rider 25

The customer profiles are the same when adding Rider 25, however, these customers arrange for purchases from another source and contract with Nicor Gas for storage and 100 percent backup service.

Rates 76 and 77

Similar to Rate 74, Rate 76 and Rate 77 are unbundled transportation rates for customers described under Rates 6 and 7, however, they have different minimum monthly bill amounts.

Rate Book Information

Rates and Riders

Nicor Gas has its Rates and Riders on file with the Illinois Commerce Commission (ICC) and they are also listed in our Schedule of Rates for Gas Service (ICC No. 16) – also called our Rate Book. A number of Riders on file with the ICC are updated monthly, including Rider 6 – the Gas Supply Cost (GSC). Updates to information sheets are posted on the first of each month.

Current Rates & Riders

Rate 1 - Residential Service
Rate 4 - General Service
Rate 5 - Seasonal Use Service
Rate 6 - Large General Service
Rate 7 - Large Volume Service
Rate 10 - Compressed Natural Gas - CANCELED
Rate 11 - Energy Service - CANCELED
Rate 17 - Contract Service
Rate 19 - Contract Service for Electric Generation
Rate 21 - Interruptible Transportation and Storage Services
Rate 74 - General Transportation Service
Rate 75 - Seasonal Use Transportation Service
Rate 76 - Large General Transportation Service
Rate 77 - Large Volume Transportation Service
Rate 81 - General Renewable Gas Interconnection Service Pilot

Associated Riders

Rider 1 - Customer Charge Adjustment

Rider 1 History - History of Utility Assessment Recovery Charge Information Sheets

Rider 1 Info – Utility Assessment Recovery Charge Information Sheet

Rider 2 - Franchise Cost Adjustment

Rider 2 History - History of Franchise Cost Adjustment Information Sheets

Rider 2 Info  - Franchise Cost Adjustment Information Sheets

Rider 3 - Invested Capital Tax Adjustment

Rider 3 History - History of Invested Capital Tax Adjustment Information Sheet

Rider 3 Info – Invested Capital Tax Adjustment Information Sheet

Rider 4 - Gas Cost Performance Program - CANCELED

Rider 5 - Storage Service Cost Recovery

Rider 5 History - History of Rider 5 Information Sheets

Rider 5 Info - Storage Service Cost Recovery Information Sheet

Rider 6 - Gas Supply Cost

Rider 6 History - History of Rider 6 Information Sheets

Rider 6 Info - Gas Supply Cost Information Sheet

Rider 7 - Governmental Agency Compensation Adjustment

Rider 7 History - History of Rider 7 Information Sheets

Rider 7 Info - Governmental Agency Compensation Adjustment Information Sheet

Rider 8 - Adjustments for Municipal and State Utility Taxes

Rider 8 History - History of Rider 8 Information Sheets

Rider 8 Info - Adjustments for Municipal and State Utility Taxes Information Sheets

Rider 9 - Air Conditioning Service - CANCELED

Rider 10 - Alternate Fuel Service - CANCELED

Rider 11 - Thermal Content of Gas Supplied

Rider 11 History - History of Rider 11 Information Sheets

Rider 11 Info - Thermal Content of Gas Supplied Information Sheet

Rider 12 - Environmental Cost Recovery

Rider 12 History - History of Rider 12 Information Sheets

Rider 12 Info - Environmental Cost Recovery Information Sheet

Rider 13 - Supplier Transportation Service

Rider 14 - Controlled Attachment Plan

Rider 15 - Customer Select Program

Rider 16 - Supplier Aggregation Service

Rider 25 - Firm Transportation Service

Rider 26 - Uncollectible Expense Adjustment

Rider 26 History - History of Rider 26 Information Sheets

Rider 26 Info - Uncollectible Expense Adjustment Information Sheet

Rider 28 - Residential Payment Assistance Programs

Rider 29 - Energy Efficiency Plan

Rider 29 History  - History of Rider 29 Information Sheets

Rider 29 Info - Energy Efficiency Plan Information Sheet

Rider 30 - Energy Efficiency Plan Cost Recovery

Rider 30 History - History of Rider 30 Information Sheets

Rider 30 Info - Energy Efficiency Plan Cost Recovery Information Sheet

Rider 31 - On-Bill Financing Program

Rider 32 - Qualified Infrastructure Plant

Rider 32 History - History of Rider 32 Information Sheet

Rider 32 Info - Qualified Infrastructure Plant Information Sheet

Rider 33 - Designated Extension Service Area

Rider 33 InfoDesignated Extension Service Area Information Sheet

Rider 34 - Supplier Firm Transportation Service

Rider 36 - Variable Income Tax Adjustment

Rider 36 History - History of Variable Income Tax Adjustment Information Sheet

Rider 36 Info – Variable Income Tax Adjustment Information Sheet

Rider 38 - Volume Balancing Adjustment

Rider 38 History – History of Rider 38 Information Sheet

Rider 38 Info – Volume Balancing Adjustment Information Sheet

Rider 39 - Special Purpose Charge

Rider 39 History – History of Rider 39 Information Sheet

Rider 39 Info – Special Purpose Charge Information Sheet

Rider 40 - TotalGreen

Summary of Charges

All charges are monthly unless otherwise noted.

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Transportation Rates

All charges are monthly unless otherwise noted.

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