Under Schertz's posted rates, a 9,000-gallon winter average would cost $16.71 more per sewer month than 6,000 gallons—and $200.52 more over 12 charges.
Schertz's winter averaging starts Nov. 1, 2026, and ends March 1 or March 15, 2027, depending on billing cycle. Twelve sewer charges based on that average begin April 1, 2027. The city's sewer-averaging notice sets out that calendar.
From the source record
Comal.News calculation from Schertz's posted sewer formula; fixed rates, no account adjustments.
The averaging rule uses a household's winter water pattern to set the usage basis for 12 sewer charges beginning in April. It is the average across the window that matters, rather than a single day's meter reading. That makes the winter measurement relevant long after winter ends.
What it costs
The posted formula starts with a $17.71 monthly base, adds $5.57 per 1,000 gallons through 12,000 gallons, and charges $13.37 per 1,000 gallons above that threshold. At 6,000 gallons, the usage portion is six times $5.57. Add the base charge and the modeled sewer charge is $51.13. At 9,000 gallons, three more blocks of 1,000 gallons add $16.71.