Southwest Gas adjusts rates to reflect changes in the Gas Cost rate for Nevada customers on a quarterly basis. The rate is composed of the Base Tariff Energy Rate (BTER) and the Deferred Energy Account Adjustment (DEAA). This rate is updated to account for changes in the cost of natural gas the Company purchased on behalf of customers, with no profit to the Company, and uses a rolling 12-month average of natural gas costs.
The Company makes these quarterly advice letter filings in February, May, August, and November. Copies of Nevada Advice Letters can be found
here
.
Southwest Gas’ most recent Nevada Quarterly Gas Cost Rate Adjustment filing was made on August 20, 2025, to account for the natural gas costs purchased by the Company between July 2024 and June 2025. The updated Gas Cost rate will be effective October 1, 2025.
In addition, on May 9, 2025, Southwest Gas filed an application with the Public Utilities Commission of Nevada (PUCN) to reduce the DEAA component of the gas cost rate. The application was approved on June 23, 2025, under PUCN Docket No. 25-05009. Beginning July 1, 2025, Southern Nevada customers will see a $0.20 DEAA credit rate per therm, and Northern Nevada customers will see a $0.25 credit rate per therm on their bills. For additional information, please refer to the Company’s press release on the DEAA credits located
here.
With the implementation of the DEAA credit rate filed on May 9 along with the BTER filed on May 20, Southern and Northern Nevada single-family residential customers are expected to see a decrease to their average monthly natural gas bills. Compared to last quarter, Southern Nevada customers should see a decrease of $0.31 (or 0.7%) and Northern Nevada customers should see a decrease of $0.44 (or 0.7%). The estimated bill for an average Southern or Northern Nevada single-family residential customer is shown in the table below.
| Annual Average1 | Summer Average2 | Winter Average3 | |
| Southern Nevada | $42.38 | $25.31 | $58.60 |
| Northern Nevada | $59.91 | $28.34 | $91.48 |
The estimated bills shown in the table above are based on the following average residential customer monthly usage. Your actual bill may be higher or lower depending on your specific usage.
1 Southern Nevada: 37 therms and Northern Nevada: 56 therms (July through June)
2 Southern Nevada: 17 therms and Northern Nevada: 20 therms (May through October)
3 Southern Nevada: 57 therms and Northern Nevada: 92 therms (November through March)
2 Southern Nevada: 17 therms and Northern Nevada: 20 therms (May through October)
3 Southern Nevada: 57 therms and Northern Nevada: 92 therms (November through March)
