Gas utilities file supply prices–called the Purchased Gas Adjustment (PGA)–each month with the Illinois Commerce Commission (ICC). Here’s what CUB uncovered in our review of prices in December.
- Compared with last month, five of 9 major utilities are charging prices that are lower, ranging from about 1.2 percent lower (Peoples Gas) to about 51.1 percent lower (Mt. Carmel). Nicor Gas’ price dropped by about 10.7 percent, Illinois Gas by 8.6 percent and Ameren Illinois by 7 percent. Prices were higher for four utilities: North Shore Gas (2.1 percent); Liberty Utilities (9.1 percent), MidAmerican (13.1 percent); and Consumers Gas (33.3 percent).
- Compared with December 2023, six out of 9 utilities are charging prices that are lower, ranging from about 2.2 percent (Illinois Gas) to about 40.8 percent (Liberty Utilities) lower. Nicor Gas is charging a supply rate that’s about 32.4 percent lower than last year, while Peoples Gas is charging a supply price that’s about 10.4 percent lower. The three utilities charging higher prices saw increases of about 6.2 percent (Ameren), 7.7 percent (Consumers Gas) and 34.9 percent (MidAmerican). See the list below, comparing the PGAs for December with the PGAs from December of 2023.
December Gas Prices
Ameren Illinois– 45.40 cents per therm (up about 6.2 percent from December 2023)
Consumers Gas– 41.91 cents per therm (up about 7.7 percent from December 2023)
Illinois Gas– 44.82 cents per therm (down about 2.2 percent from December 2023)
Liberty Utilities– 25.04 cents per therm (down about 40.8 percent from December 2023)
MidAmerican Energy– 52.82 cents per therm (up about 34.9 percent from December 2023)
Mt. Carmel– 42.51 cents per therm (down about 27.7 percent from December 2023)
Nicor Gas– 25.00 cents per therm (down about 32.4 percent from December 2023)
North Shore Gas– 44.9 cents per therm (down about 4.4 percent from December 2023)
Peoples Gas– 31.73 cents per therm (down about 10.4 percent from December 2023)
Note: Your utility is determined by where you live, so you cannot switch from one utility to another.
Under Illinois law, gas utilities are not allowed to profit off supply prices—they pass those costs from gas producers and marketers onto customers with no markup. State regulators annually review the utilities’ gas-management procedures to ensure the companies did a reasonable job with their gas purchases, given market conditions, to hold down costs for consumers as much as possible.
A few tips from CUB:
- See if you qualify for energy assistance. The application process for the Low Income Home Energy Assistance Program (LIHEAP) opens again in October. To apply or learn more, visit this state of Illinois webpage. (Also, check out our Step by step guide to applying for LIHEAP.)
- Keep the lines of communication open with your utility. If you are having trouble affording your gas bills, it is vital that you contact your utility. Ask if you qualify for any energy assistance programs; see if you can set up a plan to give you a longer time to pay off your bills; and inquire about no or low-cost energy efficiency programs the company offers.
- Practice energy efficiency at home.
- Beware of alternative supplier rip-offs. If a deal seems too good to be true, there’s a good chance it is. If the utility price increases, remember that it’s due to market factors that also will increase alternative supplier prices. As volatile as gas utility prices are, your best bet for gas supply is likely with your utility and not with an alternative supplier. Read our tips. (Note: Only consumers in Northern Illinois have gas choice.)
- More helpful resources:
- CUB’s Gas page
- Historical gas prices
- CUB’s gas-price reports from January, February, March, April, May, June, July, August, September, October, November
- If you can, consider moving away from gas: Read our electrification explainer and order CUB’s free Better Heat Guide to learn how to make the transition to more efficient appliances, like electric heat pumps and induction stove tops.
Visit CUB’s Gas page for more tips.
