Short answer
EPA does not regulate single family home septic systems. States, tribes and local governments do, and the county or local health department often issues the actual permit. The table below links to the official state agency page for 29 states that we opened and checked. Always confirm with your county health department, because pages and rules change.
If you searched for septic regulations by state, you probably want one thing: the government office that decides what you can build, repair and maintain on your property. This page is a directory of official state septic department pages, with an honest list of the states we could not check. It does not summarize the rules, because they differ by state and often by county, and they change.
Use it as a starting point, then call your county or local health department. That office usually knows what applies to your address. If you are looking for a company to do the work instead, see our guide to septic contractors near me.
Who regulates septic systems?
Many people assume a federal agency sets septic rules. EPA's "Frequent Questions on Septic Systems" page answers this directly. It says EPA does not regulate single family home septic systems, and that individual onsite systems are regulated by states, tribes and local governments, not the federal government. It also says local health agencies generally approve installation and operation under state public health laws.
In practice that means three layers can matter to you:
- The state. A state health department, environmental agency or another department usually sets the framework. Which agency it is varies. The table below shows the name each state uses on its own page.
- The county or local health department. In many places this office reviews applications, inspects work and issues the permit. Some states handle some or all of it centrally instead.
- A city, town or special district. Some add their own requirements, or handle sewer connection questions.
Because of this, "who regulates septic systems" has no single answer for the whole country. It depends on your address.
State septic department directory
EPA publishes a page called "State Septic System Program Contacts" that lists the state agency named for each state's septic program. We started there. We then tried to open each state's own official page, and a row appears below only if the page loaded for us on 13 October 2026. The agency or program name is the one shown on that page.
| State | Agency or program | Official page |
|---|---|---|
| Alabama | Alabama Department of Public Health (ADPH): Soil and Onsite Sewage | Alabama official page |
| Arkansas | Arkansas Department of Health: Onsite Wastewater | Arkansas official page |
| Colorado | Colorado Department of Public Health and Environment: Clean water: On-site wastewater treatment systems | Colorado official page |
| Connecticut | Connecticut Department of Public Health: Subsurface Sewage Disposal Systems | Connecticut official page |
| Delaware | Delaware DNREC, Division of Water: Groundwater Discharges | Delaware official page |
| Florida | Florida Department of Environmental Protection: Onsite Sewage Program | Florida official page |
| Georgia | Georgia Department of Public Health: Onsite Sewage | Georgia official page |
| Idaho | Idaho Department of Environmental Quality: Septic and Septage | Idaho official page |
| Illinois | Illinois Department of Public Health: Private Sewage Disposal | Illinois official page |
| Iowa | Iowa Department of Natural Resources: Private Sewage Disposal and Septage | Iowa official page |
| Louisiana | Louisiana Department of Health: Onsite Wastewater Program | Louisiana official page |
| Maine | Maine Center for Disease Control & Prevention: Hydrology and Wastewater | Maine official page |
| Minnesota | Minnesota Pollution Control Agency: Septic systems | Minnesota official page |
| Mississippi | Mississippi State Department of Health: On-Site Wastewater | Mississippi official page |
| Nebraska | Nebraska Department of Water, Energy, and Environment: Onsite Wastewater Program | Nebraska official page |
| New Mexico | State onsite wastewater (septic) page | New Mexico official page |
| New York | New York State Department of Health: Septic System Operation and Maintenance (publication page) | New York official page |
| North Carolina | North Carolina Division of Public Health: On-Site Water Protection Branch | North Carolina official page |
| North Dakota | North Dakota Department of Environmental Quality: On-Site Wastewater Treatment Systems | North Dakota official page |
| Oklahoma | Oklahoma Department of Environmental Quality: On-Site Sewage Treatment | Oklahoma official page |
| Oregon | Oregon Department of Environmental Quality: Housing and Onsite Wastewater Management | Oregon official page |
| Pennsylvania | Pennsylvania Department of Environmental Protection: Act 537 Sewage Facilities Program | Pennsylvania official page |
| South Dakota | State on-site wastewater systems page | South Dakota official page |
| Tennessee | State subsurface sewage disposal (SSDS) FAQ page | Tennessee official page |
| Texas | Texas Commission on Environmental Quality: On-Site Sewage Facilities (Including Septic Systems) | Texas official page |
| Vermont | Vermont Department of Environmental Conservation: Wastewater System and Potable Water Supply Program | Vermont official page |
| Virginia | Virginia Department of Health: Division of Onsite Water and Wastewater Services | Virginia official page |
| Washington | Washington State Department of Health: Septic Systems | Washington official page |
| Wyoming | Wyoming Department of Environmental Quality: Small Wastewater Systems | Wyoming official page |
We could not verify an official page for: Alaska, Arizona, California, District of Columbia, Hawaii, Indiana, Kansas, Kentucky, Maryland, Massachusetts, Michigan, Missouri, Montana, Nevada, New Hampshire, New Jersey, Ohio, Rhode Island, South Carolina, Utah, West Virginia and Wisconsin. For these, start with your county health department or EPA's septic resources, which includes the state contacts page. "Could not verify" means our checks did not load a suitable page, not that the state has no program. Several of these state sites block automated access, and some pages had moved.
How to read the table
The table is a map of where to look, not a rulebook. A few points help.
- The agency name differs by state. It might be a department of health, an environmental quality agency, a natural resources department or another body. Do not assume it is the same type of office as in the state where you used to live.
- The page may be a program page or a narrower page. Some states describe a whole program. Others had a frequently asked questions page or a single topic page that loaded. Each is official, but you may need to click through to find forms, contacts or a county list.
- The state page is not always the permit office. Many state pages say that local offices handle permits, and some name the counties that do. Treat the state page as the place to find out who your local office is.
- Pages move. State websites are reorganized, and links break. If a link fails for you, search the state agency name plus "septic" or "onsite wastewater".
- Nothing here states a requirement. We deliberately do not list inspection rules, setbacks, pumping schedules or fees for any state. Read them on the official page for your state and county.
Our guides to the types of septic systems and how often to pump a septic tank explain the general background. What your own area requires comes from your own regulator.
What to ask your county health department
Whether you own a home with a septic system, plan to repair one or are buying, a short phone call to the local office usually answers more than hours of searching. Write your questions down first. Good ones include:
- Which office handles septic permits and inspections for my address, and is it the county, a city or the state?
- Do you have a permit file for this property? How do I request a copy, and is there a fee?
- Is there an as-built drawing or a record showing where the tank and drainfield are?
- What type of system is on record: conventional, or one with pumps or mechanical parts?
- Does my permit or local rule require a maintenance contract, an operating permit or periodic reports?
- Do I need a permit before a repair, a replacement, an addition or a bedroom change? What does the process involve?
- Are installers, pumpers or inspectors required to be licensed or certified here, and where can I check a name?
- Is there a list of approved companies, or a way to check complaints about one?
- Are there repair loans, grants or other assistance programs for homeowners in this area?
- Who do I call if I see sewage on the ground or backing up inside the house?
Take notes, including the name of the person and the date. If an answer matters later, ask for it in writing. Rules are interpreted by people, and a written answer helps if there is a disagreement.
What documents to request: the permit file and as-built drawing
Records are the most valuable thing a local office can give you. Ask for the full file for your address, not just one form. The items below are the usual ones to ask about. Not every office has all of them, and older systems may have very little on file.
| Document | Why it helps |
|---|---|
| Installation permit | Shows when the system was approved and what type it is. |
| As-built drawing | Shows where the tank, pipes and drainfield sit. It saves guesswork when you need to find the tank or plan work. See how to find your septic tank. |
| Site and soil evaluation | Explains why this type of system was chosen for the lot. |
| Repair and replacement permits | Shows past problems and what was changed. |
| Inspection reports | Records what an inspector found and when. |
| Pumping and service records | Shows how the system has been maintained. Ask the seller or past pumper too. See the septic pump frequency calculator. |
| Operation and maintenance manual, plus any service contract | Matters most for systems with pumps, alarms or aerobic units. |
| Bedroom count or design capacity on record | Helps you judge whether an addition or a bigger household fits the system. |
Keep a copy with your home documents. If the office has no drawing, a licensed professional may be able to locate and map the system. Ask the local office who is allowed to do that work in your area.
Using this directory when you buy a home
If the home you are buying has a septic system, treat the system as part of the inspection, not an afterthought. A few steps use this page directly.
- Find the right office. Use the table to identify the state agency, then confirm which county or local office covers the property.
- Ask about inspection requirements in your area. Some places require an inspection or other step when a property is sold, and some do not. We do not state what applies where. Ask the local office, and ask your agent and your attorney.
- Request the permit file and as-built drawing before closing if you can, and compare them with what you can see on the property.
- Hire an independent inspector. Ask the local office what qualifications they expect. Do not rely only on a seller's report.
- Check for signs of trouble. Our guide to the signs your septic system is failing lists what to notice during a visit.
- Budget for ownership. Pumping and repairs are ongoing costs. See septic tank pumping cost for what drives the price.
Ask a lawyer how the findings should be handled in your contract. This page is not legal advice.
Septic permit by state: what to expect from the process
Searches for a septic permit by state lead to very different pages, because the process is not the same everywhere. We do not describe any state's steps here. What is true in general is that a permit or approval is usually sought before building or changing a system, that the local office or state agency decides who may apply, and that a qualified professional is often involved. Whether you can do the work yourself, what a site evaluation involves and what it costs are questions for your own office.
If you already have a problem, such as sewage backing up or wet ground over the drainfield, do not wait on paperwork. Read what to do about a sewage backup and call your local health department or utility for emergencies.
Hiring help once you know your regulator
Once you know which office regulates your system, you can check the people you hire against it. Ask the office whether installers and pumpers need a license or certification in your area, and where you can verify one. Then compare written quotes from at least three companies, as described in our guides to choosing a septic installer and septic maintenance near me. Check Google Business Profile reviews for recent, specific feedback, and make sure the company will pull any permit that is needed.
Note for Canadian readers. Provinces and territories regulate onsite wastewater, often with municipalities or regional health units. Our guide to septic regulators by province is the Canadian equivalent of this page. Check the current rules for your province.
For septic, plumbing and drain company owners
This is the kind of question your future customers type into Google before they call anyone. Pages that answer it clearly are how local companies earn trust and visits. See the septic business marketing system and the guide to near me searches for plumbers and septic companies, or book a free call.
