The rates of some Hagerstown sewer customers could increase under at least one model of a possible joint water and sewer authority with Washington County.
The mayor, City Council and Washington County Commissioners listened to the first of four presentations on possible models Tuesday before deciding to postpone the rest of the presentations for two weeks.
The rates for some Water Pollution Control customers would increase because of the treatment cost at the county's Conococheague Wastewater Treatment Plant, according to the model.
The city's sewer department would be able to delay a $3.6 million capacity expansion under that model.
Sewer flow would be switched from the city plant to the Conococheague plant in proportion to sewage flow or tax base increases inside the city, according to the model.