Josie Taylor | June 29, 2022

High levels of bacteria were found in the water at the Terry Trueblood Recreation Area. The City of Iowa City has warned against swimming in the lake because of this. 

The city has done regular water tests at the lake, called Sand Lake, in previous summers, but this is the first time there has been a no-swim advisory due to high levels of E. coli bacteria. E. coli can carry parasites or other pathogens that sicken swimmers. It can come from geese, humans or agricultural runoff. 

Paddle boarding and other activities that do not require going in the water will still be allowed at the lake. 

The Iowa Department of Natural Resources does weekly water tests at 39 state park beaches between Memorial Day weekend and Labor Day. The agency reported 106 swim advisories for E. coli or microcystins last summer.Iowa City has posted signs at Sand Lake advising against swimming. The advisory will be in effect until water quality improves, the city said. Updates will be posted on the city’s Parks & Recreation website.