Ash Tree Treatment in Watertown, SD
Every fact cited
Watertown Forestry staff confirmed emerald ash borer’s presence in the city in June 2025, with the finding verified by South Dakota State University. That matters more here than in a lot of SD cities: ash makes up nearly one-third of South Dakota’s public trees, and Watertown’s own long-term forestry goal is to bring ash down to roughly 10% of the overall canopy over the next 20 years — a sign of how significant the exposure currently is.
Left untreated, infested ash trees typically die within two to four years. For Watertown specifically, that’s the scale of the decision: treat a healthy, valuable ash and commit to an ongoing schedule, or plan for removal and replacement before decline creates a safety hazard near Lake Kampeska properties, boulevards, or older residential blocks.
The pages below cover signs, what treatment involves, cost, choosing a provider, and permit questions specific to Watertown.
When was EAB confirmed in Watertown?
June 2025, confirmed by Watertown Forestry staff and verified by South Dakota State University.
Why does Watertown care so much about ash specifically?
Ash makes up nearly one-third of public trees statewide in South Dakota, and Watertown has a stated 20-year goal to bring its own ash share down to about 10% of total canopy — reflecting how much of the city's tree cover EAB puts at risk if left unmanaged.