This area is served by 25 utility providers across 4 categories. The average residential electricity rate here is 14.3¢/kWh. 69.9% of households use electricity as their primary heating fuel.
Utility rates in ZIP 85640 vs. US average
Typical monthly utility bills in ZIP 85640
Figures from U.S. Census ACS 5-year estimates, reflecting households that pay utilities separately from rent. In dense urban areas where heat or hot water is often included in rent, these numbers represent the subset of residents who pay directly.
Electric
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Internet
Nearby ZIP codes
Frequently asked questions
How do I set up utilities when moving to 85640?
Contact each provider separately before your move-in date. Start with electric (Arizona Public Service Co) and gas (Unisource Energy Services (Uns), (928) 681-8913) since those typically need a few business days to activate. Water and sewer are often handled with one call to your local utility. Set up internet last since it may require an installation visit.
How do utility rates in 85640 compare to the national average?
Residential electricity in Tumacacori-Carmen, AZ averages 14.3¢/kWh, about 13% below the US average of 16.5¢/kWh and 4% below the Arizona state average of 14.9¢/kWh. Natural gas in Arizona averages $20.47/Mcf, about 41% above the national average. Actual monthly bills vary by home size, insulation, and season. Local rates from NREL; state and US averages from EIA Form 861 (2024); natural gas prices from EIA Form 176 (2024).
Is electricity expensive in 85640?
No — electricity in Tumacacori-Carmen, AZ costs about 13% less than the national average. Compared to Arizona overall, rates here are about 4% lower. Local rates from NREL (2023); state and US averages from EIA (2024).
What internet providers are available in 85640?
Tumacacori-Carmen, AZ has broadband coverage. Providers include CenturyLink (DSL up to 10 Mbps), T-Mobile (Fixed Wireless up to 100 Mbps), Verizon (Fixed Wireless up to 300 Mbps). Availability varies by street address. Based on FCC Broadband Data Collection filings.
What county is 85640 in?
ZIP code 85640 is in Santa Cruz County, Arizona.
Disclaimer: Provider information is sourced from federal databases including HIFLD, EPA SDWIS, FCC Broadband Data, and EIA-861. Utility cost estimates are from the U.S. Census Bureau American Community Survey 5-Year Estimates. Local electric rates are based on 2023 NREL Utility Rate Database data; state and US averages are from EIA Form 861 (2024). Coverage areas are approximate and may not reflect recent changes. Please verify directly with your provider.
Data sources: U.S. Census Bureau, NREL, EIA-861, HIFLD, EPA, FCC. Last updated: May 2026.