Update: In collaboration with Johnson County Wastewater, the Johnson County Department of Health and Environment has lifted the public health advisory to residents and businesses near the Tomahawk Wastewater Treatment Facility at 10701 Lee Blvd. in Leawood put in place on May 29, 2025. Water quality test results indicate that bacteria levels are within normal range. The advisory was issued out of an abundance of caution.

In collaboration with Johnson County Wastewater, the Johnson County Department of Health and Environment has issued a public health advisory to residents and businesses near the Tomahawk Wastewater Treatment Facility at 10701 Lee Blvd. in Leawood due to an overflow into the nearby creek. See the map below for impacted locations.

The overflow was identified this morning around 9:15 a.m. and has been resolved. It was caused by an operational failure during routine maintenance. JCW’s water quality lab team is testing the creek water downstream from the facility. Crews are working to clean up the area to prevent further contamination.

Out of an abundance of caution, due to a potential risk of E. coli exposure, JCDHE advises individuals to have no contact with the water in the creek until further notice. Residents are also advised to keep their pets from making contact with standing water in the affected areas. This does not represent any impact/implications to the public water system (i.e. tap water).

JCW will post signage in this area, is monitoring this location and conducting water quality tests to determine when this notice can be lifted. An update will be sent once this notice is lifted.

View additional information about DHE and JCW.