North American Electric Reliability Council Region Map (US)

In terms of blackouts, there are just three regions. WSCC is one, ERCOT is another. All of the rest are interconnected, so that if one goes down, all go down. It is called the Eastern Interconnection.

Please Note: In September 1996 most of Florida became a separate NERC region, the Florida Reliability Coordinating Council (FRCC). For purposes of historical trend analysis we have included FRCC in SERC.
Source: Energy Information Administration.
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