THE LOCAL ANSWERIn Watertown, South Dakota, dry out latex paint (the city says small amounts can be mixed with floor dry or cat litter), then put it in your blue garbage cart or take it to the Watertown Regional Landfill, 45605 175th St. Oil-based paint is banned from the garbage and the landfill; save it for the city’s free spring household hazardous waste event. The 2026 event has passed (the city’s manual gave both April 25 and April 26, 2026), and no 2027 date is posted. Questions: 605-882-6219.
This guide is for Watertown, South Dakota, in Codington County (not Watertown, New York). The City of Watertown runs the Watertown Regional Landfill, 3 miles south and 1 mile east of the junction of Highways 212 and 81, and its rule is simple: paint cans must be empty or dried, and no oil-based paint. Oil-based paint goes to the city’s free household hazardous waste event once a year in spring. South Dakota has no PaintCare program, and PaintCare’s locator lists no site in Codington County.
Dry latex is trash; wet paint is not
The city’s rule, repeated on its Solid Waste page and in the 2026 manual: paint cans must be empty or the paint completely dried. Small amounts of liquid latex can be mixed with an absorbent floor dry or cat litter and thrown in the garbage. Don’t put paint, antifreeze or garden chemicals in the blue cart as liquids, and don’t put paint cans in the tan recycling cart.
Oil-based paint waits for the spring event
No oil-based paint is allowed in the garbage or at the landfill. The city says items the landfill won’t take can go to its annual Household Hazardous Waste Event at the Wastewater Treatment Facility on Jensen Avenue. The 2025 event took oil-based paint for free on April 26, 2025. The 2026 manual set the 2026 event for Saturday, April 25, but its FAQ said April 26. Both dates have passed, so store sealed cans until the 2027 date is posted.
Event limits and who can come
The event is for Watertown households only; no commercial waste. In 2025 the limits were no container over 5 gallons, no load over 50 gallons and no more than 50 containers. Latex paint was not taken. Sign up at watertownsd.us/notifyme to get the next date by email or text.
Small loads still pay $10
The landfill charges $60 a ton for household trash in 2026, with a $10 minimum per load. Unsecured loads pay double, with a $30 minimum. The city’s load policy says a rollover tarp alone isn’t enough; use straps, nets or bungee cords. Cards add a 3.5% fee.
Hamlin and Deuel County neighbors had a second option
The Watertown landfill also serves nearby counties, according to a state directory. The City of Brookings held a free regional event on August 15, 2026 that took wet paint, stain and thinner (up to 15 gallons or 125 pounds per vehicle). Brookings said it was open to residents of Brookings, Deuel, Hamlin, Kingsbury, Lake and Moody counties. Codington County, where Watertown is, was not on that list, so Watertown residents could not use it.