Two-thirds of the way through summer, the Idaho State Department of Agriculture announced it has not yet detected any quagga mussels after two years of aggressive treatment in the Snake River.

However, the microscopic mussel veligers were not detected in the water near Twin Falls until late September in both 2023 and 2024. ISDA treated the infected river with a copper-based solution both years.

“Monitoring efforts in the Snake River are ongoing and remain a top priority. While early negative results are a good sign, long-term monitoring is essential to determine the full effectiveness of treatments,” according to an ISDA press release.

The department has collected over 200 negative samples from the affected area this season, the press release said.

The department said it has collected

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