Charles Mix Electric Association electricity rates
Electric cooperative · South Dakota
Charles Mix Electric Association is a member-owned electric cooperative, so its customers own it and elect its board, serving 2,661 homes in South Dakota. Its residential customers pay an average of 14.57¢/kWh including fixed and delivery charges, 19% 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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Charles Mix Electric Association bill estimates
| Monthly use | At average all-in rate | Base tariff charges* |
|---|---|---|
| 500 kWh | $72.85 | $85.90 |
| 1,000 kWh | $145.70 | $113.80 |
| 1,500 kWh | $218.55 | $141.70 |
| 2,000 kWh | $291.40 | $169.60 |
*Rate Schedule D - Residential - All Electric Heat (effective 2012-05-01, $58.00/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.
Charles Mix Electric Association residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| Rate Schedule D - Residential - All Electric Heat | 2012-05-01 | $58.00 | 5.58¢ |
| Rate Schedule D - Residential and Small Commercial | 2012-05-01 | $58.00 | 13.65¢ first 1,000 kWh, 9.60¢ after |
| Rate Schedule A - All Electric Heat | 2012-04-01 | $29.00 | 5.58¢ |
| Rate Schedule B - Residential - All Electric Heat | 2012-04-01 | $29.00 | 5.58¢ |
| Rate Schedule B - Seasonal Residential and other | 2012-04-01 | $29.00 | 13.65¢ first 1,000 kWh, 9.60¢ after |
| Rate Schedule A | 2012-04-01 | $29.00 | 13.65¢ first 1,000 kWh, 9.60¢ after |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
Charles Mix Electric Association rate history
2015–2025: +5% change in the average residential rate (13.12¢ → 13.73¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
Charles Mix Electric Association 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 Charles Mix Electric Association's counties, customers averaged 2 hr 26 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Bon Homme | 455 | 7 | 4,222 | 2025-03-15 |
| Douglas | 61 | 1 | 142 | 2025-07-30 |
| Charles Mix | 51 | 3 | 631 | 2025-07-29 |
| Brule | 44 | 3 | 284 | 2025-05-15 |
Charles Mix Electric Association service area
Charles Mix Electric Association serves 4 counties in South Dakota and 10 ZIP codes.
Bon Homme, Brule, Charles Mix, Douglas
Cities: Chamberlain, Springfield, Tyndall
Programs, smart meters & solar
| Smart meters (AMI) for homes | 0% |
| Time-based rate programs | None reported |
| Net-metered solar homes | 0 reported |
Charles Mix Electric Association at a glance
| Ownership | Electric cooperative |
| Services | — |
| Retail revenue (2025) | $9,069,000 |
| Electricity sold (2025) | 66,026 MWh |
| Balancing authority | SWPP |
| EIA utility ID | 3315 |
Other utilities in South Dakota
Frequently asked questions
What is Charles Mix Electric Association's electricity rate?
Charles Mix Electric Association residential customers pay an average of 14.57¢ 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 3% above the South Dakota average of 14.20¢ and 19% below the U.S. average.
What is the average Charles Mix Electric Association electric bill?
About $301 a month. The average Charles Mix Electric Association home uses 2,068 kWh a month. At 1,000 kWh the bill would be about $146.
How many customers does Charles Mix Electric Association have?
Charles Mix Electric Association serves 2,661 residential customers in South Dakota, across 4 counties.
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 Charles Mix Electric Association before making decisions.