Peterborough may replace its current four-tier water rate structure with a two-tier system aimed at stabilizing revenue and distributing costs more evenly among users.

More than 50 residents attended a March 17 Select Board meeting, where board member Bonnie Tucker presented the proposal. Under the current system, quarterly water use is divided into four tiers: 300 cubic feet or less, 301 to 1,000 cubic feet, 1,001 to 6,000 cubic feet and …