Official sources checked August 31, 2026

Harford County, Maryland septic permits and requirements

Maryland state and local framework

Maryland Department of the Environment states that its Onsite Systems Division provides technical direction to County Health Departments and Local Approving Authorities for delegated onsite sewage disposal programs. MDE also states that small onsite systems below 5,000 gallons per day are generally permitted by local health departments, while larger systems can require state groundwater-discharge review.

On-site wastewater professionals have state credential requirements

Maryland law established statewide credential requirements for people providing onsite wastewater services, including design, installation, operation and maintenance, pumping, repair, and property-transfer inspection. MDE states that local approving authorities verify applicable registration or licensing status when issuing septic construction permits, and local requirements may also apply.

Health Department permits and inspects onsite sewage disposal systems

Harford County Health Department identifies its Septic Inspection program as the local program that issues onsite sewage disposal system permits and inspects new, replacement, and upgraded systems. County building-inspection guidance separately routes well and septic inspections to the Health Department.

Perc testing is part of site review where public sewer is unavailable

The Health Department’s current soil-testing procedure states that, in the absence of public sewer, Harford County Code Chapter 216 and COMAR 26.04.02 require soil percolation testing as part of septic site review. An owner seeking a new system or repair/replacement must first obtain the required sanitary construction permit from the Health Department.

Perc applications require a scaled site plan and documented nearby features

For non-repair percolation testing, Harford requires a site plan drawn to an accepted scale and showing property lines or easements, structures, driveways, the proposed or existing septic area, and wells, septic systems, or septic reserve areas within 200 feet. The applicant must also provide prior soil-test or relevant environmental-assessment information when available.

Published 2025 septic fees are unusually specific

Harford County Health Department’s fee schedule effective January 1, 2025 lists $250 for a conventional soil percolation test per lot for up to five evaluations, $300 for a non-conventional or single-ring test for up to five evaluations, $400 for new sanitary construction, $210 for an upgrade to a septic system, $100 for correction to a septic tank or disposal area, $50 for correction to a sewer line or distribution box, and $25 for septic sizing including engineering-plan submissions. Applicants should confirm that the schedule remains current when filing.

Septic review is integrated with new-home permitting

Harford County’s current new-home guidance is specifically for homes on lots served by a private well and/or onsite sewage disposal system and directs septic matters to the Bureau of Environmental Health. The Health Department also reviews subdivision and site plans for property served by onsite wells and septic systems.

County has septic-specific local trade credentials

Harford County Government’s licensing information lists Journey Septic and Septic Certificate credentials among the regulated plumbing/septic categories. Property owners should verify that contractors performing regulated work hold the credentials required for the work being performed.

Repairs and failing systems receive site-specific evaluation

Harford’s soil-testing program states that testing is also performed to establish criteria for design and repair of failing onsite sewage disposal systems. Its Bay Restoration Fund program may provide qualifying financial assistance for repair of failing systems through best-available-technology septic tanks or connection to public sewer when available.

Official sources

• Maryland Department of the Environment — Onsite Systems Division
• Maryland State Board of On-Site Wastewater Professionals
• Harford County Health Department — 2025 Land & Water Resources & Permits Fee Schedule
• Harford County Health Department — Soil Percolation Test Application Procedure
• Harford County Health Department — New Home Construction: Building with a Well and Septic System
• Harford County Government — Building Inspections
• Harford County Government — Plumbing/Mechanical Services and septic credentials

SepticScope summarizes public-agency information for planning purposes. The permitting agency's current instructions control if they differ from this guide.