This tool uses City of Mesa charges for natural gas energy usage (in Therms) based on a customer's installed appliances to estimate costs on a monthly and annual basis. The tool is for informational purposes only. Actual costs will vary based on market conditions, actual usage, and specific appliance BTU. These costs do not include taxes or other fees. More information on the City of Mesa's natural gas rates can be found here. Thank you for choosing City of Mesa natural gas service.