Septic companies in Maryland

Who Regulates Septic Systems in Maryland

Sources: Maryland Department of the Environment. Checked 2026-09-18.

Maryland's septic permit is a state permit, signed at a county desk. That distinction sounds academic and it is not, because it explains why your county applies rules it did not write, and why two counties can run the same rulebook from different departments.

The rule names the authority in a way worth reading twice. Approving Authority means the Secretary of the Department of the Environment or the Secretary's designee opens in a new tab, and your county is that designee. MDE's Onsite Systems Division provides technical assistance and direction to county health departments and local approving authorities opens in a new tab.

The dividing line between a septic system and a treatment plant is a number. Small systems with a flow of less than 5,000 gallons per day are permitted by local health departments and generally classified as septic systems opens in a new tab. A house sits far below that.

One warning before you go looking for your office. Not every approving authority in Maryland is a health department: in several counties the work sits with environmental protection, land use, or environmental programmes instead. The table at the foot of this page names the office for each county rather than assuming.

Licenses and What to Check Before You Hire

Sources: Maryland Department of the Environment. Checked 2026-09-18.

Maryland is mid-transition here, and knowing that saves confusion when a contractor's paperwork says one thing and the statute says another. The law creates a licence, the licence is not yet being issued, and a registration is standing in for it.

The statute says an individual shall be licensed by the Board before the individual may provide on-site wastewater services in the State opens in a new tab, and on-site wastewater services means any activity associated with the design, installation, operation and maintenance, pumping, repair or property transfer inspection opens in a new tab. That definition is broad on purpose.

Until the Board implements its new licensing requirements and procedures, section 9-11A-15 requires any individual providing those services to register opens in a new tab, and that registration covers any septic installer, septic pumper, septic hauler, septic designer, property transfer inspector, plumber, and operation and maintenance provider opens in a new tab. So the word on a current card is registration, not licence.

The Department maintains a list of individuals who are registered to perform on-site wastewater disposal services, which local permitting authorities use opens in a new tab. Asking whether a contractor is on it is a fair question, and it is the same check your county will make.

On top of the registration, some work needs a certificate for that specific technology. MDE offers training through the Onsite Systems Division for individuals to gain certifications to install sand mound and other system types opens in a new tab. If you are being sold a sand mound or a best available technology unit, ask which certification the installer holds for it.

Two more instruments sit outside the Board. Every person in the business of removing and disposing of the contents of on-site sewage disposal systems shall obtain an annual permit from the Approving Authority opens in a new tab, which is a county permit rather than a state one. And a 2021 Act created new licensing requirements for people providing property transfer inspections opens in a new tab.

The soil work is not a private credential in Maryland at all. Site evaluations including percolation tests shall be conducted under the supervision of the Approving Authority opens in a new tab, and for the design the applicant arranges a professional engineer, an Environmental Health Specialist, or other qualified consultant as determined by that authority opens in a new tab. We hold no Maryland register of our own, so no listing here carries a verified credential for this state.

Permits, Inspections and Selling a Home

Sources: Maryland Department of the Environment; University of Maryland Extension. Checked 2026-09-18.

A person may not construct or attempt to construct an on-site sewage disposal system without first receiving a permit from the Approving Authority opens in a new tab, and no part of a system may be covered or used until it has been inspected and approved by that authority or by an approved third party opens in a new tab. Covered means backfilled, so that inspection is the last moment anyone can see the work.

On selling, we found no Maryland rule requiring a septic inspection at transfer. What the state regulates is who may perform one if it happens, which is a different thing. The 2021 legislation created licensing requirements for people providing those property transfer inspections opens in a new tab.

In practice the requirement usually comes from the lender rather than the law. Lenders may require a septic system inspection when you sell or refinance your home, and the seller is usually responsible for repair of a failing system opens in a new tab. Budget for that possibility rather than for a statutory duty.

Keeping a System Working

Sources: Maryland Department of the Environment; University of Maryland Extension; U.S. Environmental Protection Agency. Checked 2026-09-18.

Maryland binds the schedule only for the advanced units: the owner shall ensure a BAT system is inspected and has necessary operation and maintenance performed at a minimum of once per year opens in a new tab, and every BAT system sold in the State includes a two year operation and maintenance contract and a two year warranty opens in a new tab. For a conventional tank there is no mandatory interval: the permit carries MDE's recommendation that tanks be pumped at a frequency adequate to keep solids out of the drainfield opens in a new tab, and the extension service's figure is every three to five years opens in a new tab, in line with the EPA's three year inspection interval opens in a new tab.

Help Paying for Repairs

Sources: Maryland Department of the Environment; Bay Restoration Fund Advisory Committee; Maryland Department of Housing and Community Development; U.S. Environmental Protection Agency. Checked 2026-09-18.

Maryland has the strongest household septic money in this part of the country, and you are already paying into it. A $60 annual fee is collected from each user served by an onsite system, with total estimated programme income of $27 million per year opens in a new tab. That is the Bay Restoration Fund.

Who may apply is drawn wide, and it includes ordinary homeowners. Maryland residents, non-profits and business owners paying into the Bay Restoration Fund may be eligible for funding through the BRF septic system upgrade programme opens in a new tab. If you pay the fee, you are in the eligible group.

The queue is ordered, and the top of it is worth knowing. Priority is given to failing septic systems in Critical Areas, and funds can be provided for upgrades of existing systems to best available technology for nitrogen removal, or for the marginal cost of using it instead of conventional technology opens in a new tab.

Drainfields were brought in recently and the tiers are by income. Low income recipients may qualify for up to 100% funding and moderate income recipients up to $5,000 of eligible project costs opens in a new tab, and a low income owner is also eligible for a 50% grant toward the annual operation and maintenance cost beyond the initial period opens in a new tab.

Apply through your county, not to the state, and expect the money never to touch your bank account. The county or its coordinating administrative partner facilitates the grant process with the property owner for the installation opens in a new tab. As of 30 June 2025 the fund had paid for 17,184 best available technology upgrades across Maryland, 10,550 of them inside the Critical Areas opens in a new tab, so this is a programme with a long record rather than a pilot.

Two further routes are worth a call if the fund does not fit. Maryland Housing Rehabilitation Program loans are originated, packaged and closed by the Department of Housing and Community Development and its local partners opens in a new tab, and federal grant funds can help a nonprofit run a revolving loan fund for owner occupiers in an eligible rural area opens in a new tab.

Find Your Local Approving Authority

Maryland septic permits are issued by the local approving authority for your county, acting as the state's designee. Not all of them are health departments. Each entry below names the office for that county. Checked 2026-09-18.

Questions People Ask