City of Sumas electricity rates
Municipal utility · Washington
City of Sumas is a city-owned municipal utility, governed locally rather than by the state commission, serving 1,039 homes in Washington. Its residential customers pay an average of 8.98¢/kWh including fixed and delivery charges, 50% less than the U.S. average.
Rate basis: EIA-861 2025 annual data, adjusted to the 12 months ending 2026-07 using the state's price trend. This utility files EIA's short form, which reports total sales only, so the rate covers all customer classes.
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City of Sumas bill estimates
| Monthly use | At average all-in rate | Base tariff charges* |
|---|---|---|
| 500 kWh | $44.90 | $39.65 |
| 1,000 kWh | $89.80 | $74.30 |
| 1,500 kWh | $134.70 | $108.95 |
| 2,000 kWh | $179.60 | $143.60 |
*Schedule One - Residential Rate (effective 2015-06-08, $5.00/month customer charge), energy and fixed charges from the OpenEI Utility Rate Database. Riders, fuel adjustments and taxes are often billed separately, so real bills usually land closer to the all-in column. Calculate your bill.
City of Sumas residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| Schedule One - Residential Rate | 2015-06-08 | $5.00 | 6.93¢ |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
City of Sumas rate history
2015–2025: +33% change in the average residential rate (6.28¢ → 8.34¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
City of Sumas doesn't report reliability metrics to EIA (common for small utilities).
Outages in counties served (2025)
From ORNL EAGLE-I, which tracks customers without power every 15 minutes. These counts cover every utility in each county. Weighted across City of Sumas's counties, customers averaged 6 hr 42 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Whatcom | 402 | 89 | 6,129 | 2025-12-17 |
City of Sumas service area
City of Sumas serves Whatcom County in Washington and 1 ZIP codes.
Whatcom
Programs, smart meters & solar
| Smart meters (AMI) for homes | 0% |
| Time-based rate programs | None reported |
| Net-metered solar homes | 0 reported |
City of Sumas at a glance
| Ownership | Municipal utility |
| Services | — |
| Retail revenue (2025) | $2,774,200 |
| Electricity sold (2025) | 33,281 MWh |
| Balancing authority | PSEI |
| EIA utility ID | 18282 |
Other utilities in Washington
Frequently asked questions
What is City of Sumas's electricity rate?
City of Sumas residential customers pay an average of 8.98¢ per kWh, all charges included (EIA-861 2025 annual data, adjusted to the 12 months ending 2026-07 using the state's price trend). That's 36% below the Washington average of 14.12¢ and 50% below the U.S. average.
What is the average City of Sumas electric bill?
About $240 a month. The average City of Sumas home uses 2,669 kWh a month. At 1,000 kWh the bill would be about $90.
How many customers does City of Sumas have?
City of Sumas serves 1,039 residential customers in Washington, across 1 county.
Sources: EIA-861 2025 and EIA-861M (through July 2026), OpenEI URDB, ORNL EAGLE-I, U.S. Census. Methodology. Spot an error? Rates change often, so confirm with City of Sumas before making decisions.