The Conshohocken Sewer Authority is preparing to field a lot of questions when property owners and tenants (depending on the situation) receive their sewer bill in April. For the first time, the bill will include a new stormwater fee that is based on a property’s impervious coverage. The authority held two public meetings in an effort to educate the public about the fee, but few attended. You can find an initial mailer here.

The new fee is anticipated to be “roughly” $6.50 per 1,000 square feet of impervious area on a property according to a mailer sent by the authority in 2023. This is expected to average $10 per month for a single family residential customer (or $120 for the year). As of 2022, 27 municipalities in Pennsylvania had adopted a stormwater fee according to Penn State Extension.

There is a good explanation of how this came to be in the video below (some of it is hard to hear). Essentially, the Borough of Conshohocken sold the stormwater system to the sewer authority. The authority will now subcontract the borough to maintain the system. The authority then assesses the fee to cover the maintenance and capital improvements.

How much impervious coverage your property is currently deemed to have was determined by overhead images that were taken and processed through a system that made the calculation.