ZIP code 99116 covers Coulee Dam, Washington in Okanogan County. This area is served by 50 utility providers across 4 categories. The average residential electricity rate here is 5.8¢/kWh. 86.8% of households use electricity as their primary heating fuel.
Estimated monthly utility costs
$383/month
Cost estimates from U.S. Census ACS 5-year data · Shorter bar = lower cost
Natural Gas
Water
Sewer
Internet
Nearby ZIP codes
Frequently asked questions
How do I set up utilities when moving to 99116?
Contact each provider separately before your move-in date. and gas (Avista Corp, (509) 489-0500) 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 much do utilities cost per month in 99116?
Total estimated monthly costs are around $382, which is about $1 less than the national average. Electricity is the biggest expense at roughly $175/month. Natural gas runs about $125. Water and sewer combined are around $83. Costs vary by home size, usage, and season. Estimates from U.S. Census ACS data.
Is electricity expensive in 99116?
No — electricity in Coulee Dam, WA costs about 61% less than the national average. Compared to Washington overall, rates here are about 44% lower. Based on 2023 NREL residential electricity rate data.
What internet providers are available in 99116?
Coulee Dam, WA has strong broadband coverage. Providers include CenturyLink (DSL up to 40 Mbps), Grant PUD (Fiber up to 1,000 Mbps), Spectrum (Cable / Fiber up to 1,000 Mbps), T-Mobile (Fixed Wireless), Verizon (Fixed Wireless up to 50 Mbps). Availability varies by street address. Based on FCC Broadband Data Collection filings.
What county is 99116 in?
ZIP code 99116 is in Okanogan County, Washington.
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. Electric rates are based on 2023 NREL data. 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: April 2026.