Sewage Program

The Environmental Health staff evaluates proposed subdivisions to determine if onsite wastewater treatment systems are feasible. This cooperative effort between the Platte County Health Department and the Platte County Planning and Zoning Department eliminates many potential health problems associated with the improper disposal of human waste.

Before an onsite wastewater treatment system is installed in unincorporated Platte County, the homeowner is responsible for obtaining a permit from the Health Department. The Environmental Health staff issues permits and permit exemptions, inspects new, repaired, and existing systems, and investigates sewage complaints. Follow the instructions below to apply for a permit or permit exemption, to request an inspection, or to lodge a complaint.


To apply in person or by U.S. Mail: Fill out this Sewage Permit Application, then 'Save' to your computer.  Print the completed application, which the property owner must sign.  Deliver or mail the signed application, soil morphology report, site layout illustration, and permit fee to Platte County Health Department, 212 Marshall Road, Platte City, MO 64079.

To apply online: Follow these steps:
    1. Fill out this Sewage Permit Application, then 'save' to your computer.
    2. 'Save' the 
soil morphology report to your computer.
    3. 'Save' the site layout illustration to your computer.
    4. Email the Sewage Permit Application, soil morphology report, and site layout illustration to [email protected] 


The Environmental Health staff considers permit exemptions when a room addition (other than bedrooms) is proposed or when outbuildings, swimming pools, etc. are proposed. For an application for permit exemption, click on the following link:

Application for Permit Exemption

INSPECTIONS OF EXISTING SYSTEMS - This service is temporarily suspended due to COVID-19

The Environmental staff evaluates existing onsite wastewater treatment systems as requested by lending institutions, Real Estate Agents, and Prospective Buyers. Many lenders require that the sewage system is operating properly before lending money on a property. To request an inspection of an existing system, phone the Environmental Health Division at (816) 858-2412 or click on the following link:


The Environmental Health staff responds to complaints and provides expertise in finding solutions to eliminate sewage problems. The staff works with the Platte County Prosecuting Attorney's Office if it becomes necessary to prosecute violators of environmental health laws and ordinances.