KINGFIELD — Some customers on the town’s wastewater system may see a change in their sewer bills.

The town’s method of billing customers for sewer units has not been updated for 30 years, selectmen noted during their Monday night discussion.

“We have people with an apartment in their house, and they are paying for two sewer units, and others are paying for only one,” Selectman John Dill said.

Selectmen want to ensure that all residents are being charged their fair share. The wastewater bills can be based on gallons per day, rather than the number of units per building.

Heather Moody suggested that billing per unit might not reflect true sewer usage. If tenants in apartments move in and out frequently, usage could vary significantly. The updated billing system should take care of that inequity.

“We will tell people that we think that they have a certain number of units, and if they disagree, they can tell us,” Selectman Wade Brown said.

Selectmen also plan to meet soon with West Kingfield Road landowners to continue discussions about costs to repair damage from the overflow of Rapid Stream when Tropical Storm Irene hit in August.

A gravel berm, which diverted water away from properties, was washed away, and the road’s shoulder has eroded to a 90-degree angle. The flooding also washed away a camp and rerouted the Rapid Stream around another resident’s home.

“I have generated a list of values of properties on Rapid Stream,” Moody said. “I would like to see paper company landowners attend.”

There are about a dozen seasonal camps in that area, Moody said.

According to an engineer’s estimates, the berm repair will cost $10,000 and the road shoulder repair will cost $25,000. The town is eligible for federal grant money but needs to provide 25 percent of those costs.

In other news, Moody announced that Maine Rural Water Association judged Kingfield’s water to be the best in the state. Madison Water District had the best-tasting chlorinated water. Overall, Kingfield’s won the top spot at the 25th annual drinking water taste test in Freeport.

Kingfield’s Water District superintendent will represent Maine in the Great American Water Taste Test in February in Washington.