Rising electricity rates are hitting consumers just about everywhere as utilities struggle to build enough power plants to meet rising demand from data centers.

But the effects on prices vary a lot by state.

Federal electricity data released on Tuesday helps to identify where the increases in bills have been the most drastic. I found several surprises.

As of July, the average household price of electricity in the United States has risen by 9.5 percent this year, according to the Energy Information Administration. You might guess that the largest increases were in states known for high electricity costs, such as California, or those that are part of the PJM Interconnection, a multistate grid region embroiled in controversy over rising prices .

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