COUNCIL GROVE, Kan. (AP) — Zebra mussels are causing water problems in Council Grove. City Administrator Danny Matthews on Thursday night asked that residents not use any city water for the time being because the city's water tower is nearly empty. Matthews says zebra mussels are clogging the tower's intake from Council Grove City Lake. Crews are working to clear the intake. Matthews says it will take eight to 10 hours to fill the water tower again once the intake work is done. WIBW reports citizens are being asked to avoid using any city water so the water still in the tower is available for emergencies.