WICHITA, Kan. (AP) -- Wichita city officials temporarily plugged a leaky valve at the city's main sewage treatment plant that was sending contaminated water into the Arkansas River.

The leak prompted the state health department to issue a public health advisory.

The Kansas Department of Health and Environment said Tuesday the river's water quality was improving after the repair was installed. But spokeswoman Miranda Steele said inspectors couldn't determine if the leak was completely sealed because the valve is under water.

The Wichita Eagle reports (http://bit.ly/JtF9uj ) the city will test the water every day for at least the next two weeks to determine if the fix is working.

Meanwhile, health officials say people and animals should have no contact with the river between the Lincoln Street bridge and the Oklahoma border.