Our Goals

Protect the water supply by insuring the plumbing has no cross-connections or possibility of back flow. Inspecting the waste plumbing to verify it is properly vented and trapped so the plumbing safely carries waste away to insure it does not create a health hazard.

By law, only State Certified Plumbing Inspectors can inspect commercial and residential plumbing work in Miami County. Plumbing Inspectors must follow the Ohio Administrative Code known as the Ohio Plumbing Code - and the Miami County Plumbing Regulations.

All people doing plumbing work must be registered with Miami County Plumbing Department or be a homeowner working on their own residence. Rental properties must have a registered, state certified plumbing contractor do the work. Plumbing permits are issued through this office. Plumbing Contractors working on commercial projects and homeowners must meet with plumbing inspectors before a permit will be issued.


In the near future,  Miami County Public Health will be transitioning to iWorQ for plumbing permitting, plan review and backflow certification tracking.  This new platform will allow plumbing companies to electronically submit plans, request permits, submit backflow test results and to pay fees online.   For those who have done business with the Miami County Department of Development (building department), this is the same system they use to track gas connection and other permits. 


We are currently finishing the final details to ensure a smooth transition to the new system.   If you would like to learn more about iWorQ visit


Attention Backflow Inspection Companies- Effective July 1, 2021, Miami County Public Health will no longer be the record keeper for annual backflow certifications in West Milton and Ludlow Falls. Please send annual certification results to the village of West Milton.

All annual backflow certifications within the city limits of Piqua should be sent to the Piqua Municipal Water System.


Plumbing Complete Fee Schedule


Registered Backflow Inspection Companies

Plumber Registration

Registration for Backflow and Irrigation


MIAMI - Plumbing Permit Application

MERCER - Plumbing Permit Application

AUGLAIZE - Plumbing Permit Application

Backflow Certification Form

Irrigation Permit Form


Ohio Plumbing Code

Miami County Plumbing Regulations

Frequently Asked Questions

General Information - Plumbing in Miami County

IWorq Permit Portal - Under Construction