The Sammamish Plateau Water and Sewer District’s board of commissioners on Dec. 14 authorized an increase to water and sewer rates in 2016.

Water rates were raised 4.8 percent overall — the combined result of a 5.5 percent increase to customers’ base water charge and a 4 percent increased cost for water used. The district estimated in early December that the increase would raise the median single family’s monthly bill by $1.66-to-$1.98.

The increases follow a red-letter year for water use. Water revenue is expected to be more than $1 million above the nearly $12 million anticipated at the beginning of 2015, according to a presentation given in early November. Moreover, staff surmised that more water may have been consumed in 2015 than any other year in the district’s history.

The additional revenue for 2016 is set to fund a major water meter replacement project, as well as improvements to water facilities to improve their stability in earthquake activity. The district is eyeing $11.2 million in water capital projects in the coming year.

Meanwhile, sewer revenue is set to increase 3 percent, translating to an average 97-cent increase. The average sewer bill for a Sammamish family will become $33.16 per month.