Missouri Public Service Commission

JEFFERSON CITY---Natural gas rates of Union Electric Company d/b/a Ameren Missouri customers will change under a filing that will take effect on November 1, 2022.

The rate change reflects the Weather Normalization Adjustment Rider (WNAR) which authorizes rate adjustments based on weather variations. The purpose of the WNAR tariff is to adjust revenues, either positive or negative, for differences between actual heating degree days and normal heating degree days.

Under the Ameren Missouri filing, a residential natural gas customer using approximately 100 Ccf (10,000 cubic feet) of natural gas a month, will see a net increase in their monthly natural gas bill of approximately $1.57. The WNAR replaces Ameren Missouri’s prior mechanism, the Delivery Charge Adjustment Rider (DCA).

Ameren Missouri serves approximately 134,500 natural gas customers in the Missouri counties of Audrain, Bollinger, Boone, Butler, Callaway, Cape Girardeau, Cole, Cooper, Dent, Gasconade, Howard, Lincoln, Miller, Moniteau, Montgomery, Morgan,
Phelps, Pike, Ralls, Randolph, St. Charles, Saline, Scott, Stoddard and Warren.

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Case No. GT-2023-0090