Rates, fees & cost adjustments

We are a not-for-profit municipal utility, and we serve our customers, not shareholders.

We believe in keeping rates as low as possible, and we also believe in transparency in how your bill is calculated each month.

When we talk about rates, there are two different aspects: base rates and cost adjustments.

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Base rates

Base rates reflect the costs associated with producing and delivering each service to customers.

Base rates pay for the operation and maintenance of power plants, water collection and distribution systems, wastewater treatment, metering and billing systems, and more.

The physical things you see, such as poles, wires and pipes, are financed through base rates.

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Cost adjustments

Cost adjustments only apply to electric and natural gas services. Prices for natural gas and electricity can change quickly and are uncontrollable.

We typically adjust rates each quarter to account for increases and decreases in these prices. Increases or decreases are passed directly to our customers. 

Natural gas cost adjustments directly reflect the cost to serve our customers with natural gas appliances. Since natural gas is a source of electric production, electric cost adjustments are also affected by fluctuations in natural gas costs.

Latest cost adjustment

Large transmission lines stretching across a field with yellowish grass and mountains in the background.

We are proposing a decrease to electric fuel rates, which would lower the average residential customer’s monthly bill by $1.54.

We have achieved about $7 million in savings since joining the Southwest Power Pool in April, based on results through June. When we generate electricity for less than the market price, we can sell excess power to other utilities. Savings realized are being passed to customers through this fuel rate decrease. 

If approved, the decrease would take effect on Oct. 1. 

Additionally, in March 2026, we decreased electric and natural gas fuel rates, lowering the average residential customer's monthly bill by $9.72.

Service fees

 

Related documents

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Residential ratesheet

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Business ratesheet

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Electric tariff

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2026 Supplemental Rate Case Filing

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2026 Rate Case Additional Supplemental Filing

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Natural gas tariff

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Water tariff

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Wastewater tariff

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2025 rate case filing

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2025 supplemental rate case filing

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Utilities rules & regulations tariff

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Development charges & fees

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