Brazil's electrical infrastructure has made significant progress in universalizing service, but it still faces strong regional imbalances, especially when indicators are analyzed collectively.
The indicators of access, cost, and quality of electricity are included in the Competitiveness Ranking of the States, with data from 2025.
Access to electricity
Regarding access to electricity, the data points to a widespread scenario in the country. States such as Rio de Janeiro, São Paulo, and Goiás, in addition to the Federal District, appear at the top of the ranking, with maximum scores or close to 100, reflecting a practically universal coverage of the service.
Most Brazilian states remain above 85 points, including historically more challenging regions like the North and Northeast, indicating that access is no longer the main structural obstacle in the Brazilian electricity sector.
Cost of electrical energy
Despite this progress, the picture becomes more heterogeneous when considering the cost of electricity. The map highlights significant contrasts between regions. States in the Northeast, North, Midwest, and Southeast concentrate a significant portion of the highest electricity costs in the country.
Conversely, Paraíba leads the ranking for the cheapest cost, followed by Santa Catarina and Roraima.
Electrical power quality
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Source: Ranking of Competitiveness of the States
The differences become even more pronounced when analyzing the quality of electrical energy, an indicator that assesses the continuity and stability of the supply.
States like Acre, Rondônia, Paraíba, and Rio Grande do Norte lead the ranking, with scores above 90, indicating a lower frequency of interruptions and shorter duration of power outages.
These results even surpass those of states with more robust economies and more extensive networks, which reinforces the importance of operational management, investments in maintenance, and modernization of electrical infrastructure.
On the other hand, Goiás, Amapá, Alagoas, and Roraima are among the lowest-ranked states in terms of quality, registering a higher incidence of failures related to continuity of supply.
In states like Roraima, which ranks last, the performance reflects structural limitations of the network and greater vulnerability to external events, while in other cases the data suggest challenges related to the high system load and the complexity of the operation.
The indicator used is the DGC (Overall Continuity Performance), calculated from the average of the ratios between the values obtained and the annual limits of the DEC (Equivalent Interruption Duration per Consumer Unit) and FEC (Equivalent Interruption Frequency per Consumer Unit) indicators, as defined by... ANEEL (National Electric Energy Agency).
In practice, the index measures how many times the electricity supply is interrupted and for how long, comparing the actual performance of distributors with regulatory parameters. Therefore, the lower the DGC, the better the quality of service provided.
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