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A recent study commissioned by the Illinois Attorney General compared the operating costs of People’s Gas against those of 18 other Midwestern utility companies. The data are from filings made to states and the Federal Energy Regulatory Commission.

Operations and maintenance cost per customer, 2003-13

Includes cost of production, underground storage, transmission distribution and other costs

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Adminisitrative costs per customer, 2003-13

Includes administrative and general salaries, office supplies, insurance and other costs

Sources: Court filings