Idaho electricity imports

Change and comparison

Historical data

Compared with other states

Every state is compared on imported share of electricity use from the U.S. Energy Information Administration: Net electricity imports as a percent of retail electricity sales in the state for the same calendar year, both from the EIA: net interstate flow with the sign reversed, divided by retail sales, times 100. A negative share means the state was a net exporter.

An excerpt; the full table is below.

Out-of-state generation owned by Idaho utilities

This breakdown is from U.S. Energy Information Administration, on a different basis than the headline figure above. For each owner with an Idaho address on Form EIA-860, the sum over its plants outside Idaho of the plant's EIA-923 net generation times the owner's share, in gigawatt-hours. An ownership share of output, not a delivery to Idaho.

• An owner's share of a plant's output is that share times the plant's net generation, arithmetic on two published figures; it is not a record of where the electricity was delivered, and a utility can sell its share into the market or buy more than it owns.
• The selection is Form EIA-860's own Owner State field. It admits Idaho Power and Boise-based developers whose plants in California, New Mexico, Montana, Utah and Oregon sell to buyers in those states; it excludes PacifiCorp (Portland), whose Rocky Mountain Power division serves eastern Idaho from a six-state system, and Avista (Spokane), which serves northern Idaho.
• The owner file lists only generators with more than one owner or an owner other than the operator, so a utility's wholly owned plants, including all of Idaho Power's Idaho hydroelectric plants, are not in it.
• Only generators marked operating (status OP, SB or OS) are kept. Idaho Power's 10 percent of Boardman, Oregon, retired in 2020, and plants under construction are excluded because they generated nothing in the year.
• Plants made up only of batteries (Clenera's Atrisco Energy Storage, New Mexico) are excluded: a battery's net generation is its charging losses, so it shifts demand rather than supplying power. A plant that pairs batteries with solar stays, and its net generation already includes the batteries' losses.
• Purchased power (power-purchase agreements, market buys, federal hydropower marketed by the Bonneville Power Administration) is not in either form, so these rows are a floor on out-of-state supply, not the whole of it.

Share of the electricity Idaho uses

31.7% in 2024. Net electricity imports as a percent of retail electricity sales in the state for the same calendar year, both from the EIA: net interstate flow with the sign reversed, divided by retail sales, times 100. A negative share means the state was a net exporter.

Plants with an Idaho-based owner

One row per plant and Idaho-based owner for the year, ordered by the owner's share of the plant's net generation, largest first.

Source: U.S. Energy Information Administration, Forms EIA-860 and EIA-923, plant ownership and output. Published September 2026.

Source

Inputs: Net Interstate Flow of Electricity.

Cite

Cite this page as Understand Idaho, “Idaho electricity imports”, https://understandidaho.com/energy/imports/, retrieved on the date you read it, and the publisher named above for the figures themselves. The dataset behind it is described in the data catalog.

Related

Posts that read this data beside other figures:

• Where does Idaho's electricity come from?

• Idaho electricity generation
• Idaho hydropower generation
• Idaho electricity use
• Idaho power plants
• All energy data