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Consumer advocates are raising concerns about proposals by two Wisconsin utilities that would allow fewer inspections of natural gas meters.

When the Public Service Commission authorized installation of advanced meters more than 10 years ago, the commission expressed concerns about no longer having a person check the meter once a month and ordered the utilities to do annual inspections.

Alliant argues the yearly inspections are unnecessary and have cost about $4.4 million more over the past decade than doing three-year inspections. Xcel notes that annual surveys aren’t required by state or federal law and estimates it could save about $135,000 a year by doing them less frequently.

Alliant, which has installed about 170,000 advanced meters, reported an average of 6,225 problems per year. Xcel, which serves about 112,000 gas customers in western Wisconsin, found an average of 1,688 problems.

Alliant spokeswoman Annemarie Newman said the problems identified do not present immediate safety concerns and that reducing the frequency of surveys won’t affect service and will free up employees to do other maintenance. She said Alliant would continue to inspect about 11,500 public and business-district meters annually.