Union County Electric Co-op electricity rates
Electric cooperative · South Dakota
Union County Electric Co-op is a member-owned electric cooperative, so its customers own it and elect its board, serving 1,685 homes in South Dakota. Its residential customers pay an average of 16.89¢/kWh including fixed and delivery charges, 6% 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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Union County Electric Co-op bill estimates
| Monthly use | At average all-in rate | Base tariff charges* |
|---|---|---|
| 500 kWh | $84.45 | $108.00 |
| 1,000 kWh | $168.90 | $181.00 |
| 1,500 kWh | $253.35 | $239.00 |
| 2,000 kWh | $337.80 | $287.00 |
*residential single phase heating (effective nan, $35.00/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.
Union County Electric Co-op residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| residential single phase heating | nan | $35.00 | 14.60¢ first 1,200 kWh, 9.60¢ after |
| seasonal service heating | nan | $35.00 | 14.60¢ first 1,200 kWh, 9.60¢ after |
| seasonal service | nan | $35.00 | 12.00¢ first 1,200 kWh, 7.00¢ after |
| residential single phase | nan | $35.00 | 12.00¢ first 1,200 kWh, 7.00¢ after |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
Union County Electric Co-op rate history
2015–2025: +38% change in the average residential rate (11.53¢ → 15.92¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
| 2019 | Union County Electric Co-op | South Dakota avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 248 | 257 | 266 |
| Outages per customer (SAIFI) | 3.15 | 1.24 | 1.34 |
| Average restoration time (CAIDI) | 79 min | — | — |
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 Union County Electric Co-op's counties, customers averaged 7 hr 17 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Union | 437 | 17 | 650 | 2025-07-29 |
Union County Electric Co-op service area
Union County Electric Co-op serves Union County in South Dakota and 1 ZIP codes.
Union
Cities: Elk Point
Programs, smart meters & solar
| Smart meters (AMI) for homes | 100% |
| Time-based rate programs | None reported |
| Net-metered solar homes | 0 reported |
Union County Electric Co-op at a glance
| Ownership | Electric cooperative |
| Services | — |
| Retail revenue (2025) | $4,748,000 |
| Electricity sold (2025) | 29,823 MWh |
| Balancing authority | SWPP |
| EIA utility ID | 19493 |
Other utilities in South Dakota
Frequently asked questions
What is Union County Electric Co-op's electricity rate?
Union County Electric Co-op residential customers pay an average of 16.89¢ 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 19% above the South Dakota average of 14.20¢ and 6% below the U.S. average.
What is the average Union County Electric Co-op electric bill?
About $249 a month. The average Union County Electric Co-op home uses 1,475 kWh a month. At 1,000 kWh the bill would be about $169.
How many customers does Union County Electric Co-op have?
Union County Electric Co-op serves 1,685 residential customers in South Dakota, across 1 county.
How reliable is Union County Electric Co-op?
In 2019, the average Union County Electric Co-op customer was without power for 4 hr 8 min (SAIDI) over 3.15 interruptions (SAIFI), including major storms. The South Dakota average was 4 hr 17 min and the U.S. average 4 hr 26 min.
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 Union County Electric Co-op before making decisions.