South Dakota time-of-use hours by utility
Every South Dakota electric utility we track with at least one active time-of-use rate plan, with peak and off-peak hours verified against the published tariff. Periods only — no price values.
Every TOU schedule on this page verified since
Utilities in South Dakota
Sorted by number of customers served in South Dakota.
Frequently asked
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What are the typical time-of-use on-peak hours in South Dakota?
Across the 4 residential TOU plans tou.tools tracks in South Dakota, the most common on-peak window is 9 AM – 9 PM (1 plan); others run 12 PM – 8 PM and 10 AM – 10 PM. Every hour outside the on-peak (and any mid-peak) window is billed as off-peak. Exact boundaries vary by utility and plan — see each utility's schedule above.
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Which electric utilities in South Dakota offer time-of-use rate plans?
tou.tools tracks 6 South Dakota utilities with at least one active TOU rate plan — 17 active schedules in total. The largest by customers served are Northern States Power Co - Minnesota, Black Hills Power, Inc., and NorthWestern Energy. They span investor-owned utilities. The full list above is sorted by customers served.
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Do South Dakota time-of-use peak hours apply on weekends?
On the residential TOU plans we track in South Dakota, on-peak hours apply on weekdays only — weekends are off-peak across all 4 plans. Many tariffs also treat observed holidays as off-peak; the Days column in each schedule above shows the exact rule.
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Do South Dakota time-of-use hours change by season?
Some do. Of the 4 residential TOU plans we track in South Dakota, 1 shift their period boundaries between seasons (typically summer and winter), while 3 keep the same hours year-round. Each schedule above lists its exact season dates.
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How do I find which South Dakota utility serves a specific address or ZIP code?
tou.tools maps 1,954 South Dakota ZIP codes to the utilities that serve them. Because service territories can overlap, a ZIP may return more than one candidate utility; supplying a full street address resolves it to a single utility via a geocoded point-in-territory lookup. The REST API and MCP server both return the matching utility and its current TOU period.
Time-of-use periods for all of South Dakota, one API.
Resolve any South Dakota ZIP or address to its utility and get the current period plus the next transition — over REST or MCP.