Sourced from Pennsylvania DEP’s Act 537 Sewage Facilities Program documentation and 25 Pa. Code Chapters 71–73 — last checked July 2026.
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Who Is My Sewage Enforcement Officer?
Pennsylvania doesn’t run septic permitting through county health departments the way most states do. Under Act 537 it runs through local agencies, and the person who actually approves your permit is a Sewage Enforcement Officer, or SEO. Most homeowners have never heard the term until they need one.
An Act 537 local agency can be an individual municipality, a group of municipalities working together (a joint local agency), or a county health department acting as the local agency. Because the arrangement varies, your municipal office is always the right first call.
Why Pennsylvania Works Differently
In Georgia, Florida, Tennessee and most other states, septic permits come from a county health department. Pennsylvania built a different system in 1966 with the Pennsylvania Sewage Facilities Act, better known as Act 537.
Act 537 pushed responsibility down to the municipal level. Every municipality must maintain a DEP-approved Official Sewage Facilities Plan covering both current and future sewage needs, and each local agency employs the SEO who handles individual permits.
DEP’s role is oversight. It reviews and approves municipal plans, sets the technical standards through the Environmental Quality Board, and provides grants and reimbursements to local agencies. It does not issue your permit.
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What “Local Agency” Actually Means
This is where most explanations get it wrong, including several other septic sites. People say “your township handles it.” That is often true but not always.
Per DEP, the program is administered by individual municipalities, groups of municipalities, local agencies including county health departments, and groups of local agencies known as joint local agencies.
| Arrangement | What It Means for You |
|---|---|
| Individual municipality | Your township, borough or city employs its own SEO. Call the municipal office directly. |
| Joint local agency | Several municipalities share one agency and often one SEO. Common in rural PA where individual townships are too small to staff the role. |
| County health department | In some parts of the state a county health department acts as the local agency, which looks more like how other states operate. |
Because the arrangement varies, your municipal office is always the correct first call. If they don’t handle it, they’ll tell you who does. That redirection is normal.
What the SEO Actually Does
The SEO is not an administrator who stamps paperwork. They are the technical decision-maker on your project.
They conduct or review the soil testing and site evaluation that determines what your property can support. They approve the system design against the standards in 25 Pa. Code Chapter 73. They issue the permit. And they inspect the installation before it is covered.
Practically, this means the SEO is your first call on any septic project — before you hire a designer, before you get quotes, before you commit to anything. The site evaluation determines what is even possible on your lot, and everything downstream depends on it.
One detail worth knowing: every local agency must employ both a primary and an alternate SEO. If your primary is unavailable, someone else is covering. You should never be told there is nobody to help you.
Homeowners Can Install Their Own Systems — With a Catch
Unlike Georgia and Florida, which prohibit homeowner self-installation outright, Pennsylvania permits it. The SEO must still approve the design and inspect the work.
Whether that is a good idea is a different question. A failed installation means starting over, and the SEO will not sign off on work that does not meet Chapter 73 standards. DEP also maintains a list of individuals who have completed a DEP-approved installer course, which is worth asking about when comparing contractors.
If You’re Subdividing or Building
New land development usually requires a planning module — a formal update to the municipality’s Official Plan — before a subdivision can be created. This is a separate process from an individual permit, and it takes considerably longer.
Industry sources put DEP planning module review at 60 to 120 days under standard procedures, longer for complex or environmentally sensitive sites. If you are working to a construction timeline, that is the number to plan around.
Certain subdivisions are exempt from the planning module process under 25 Pa. Code § 71.51(b). Your SEO or municipal office can tell you whether an exemption applies.
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Frequently Asked Questions
Who issues septic permits in Pennsylvania?
Your local agency under Act 537, through its Sewage Enforcement Officer. That local agency may be your municipality, a joint agency covering several municipalities, or in some areas a county health department. DEP provides oversight but does not issue permits.
What does a Sewage Enforcement Officer do?
The SEO conducts or reviews soil testing and the site evaluation, approves the system design against 25 Pa. Code Chapter 73, issues the permit, and inspects the installation before it is covered.
How do I find my SEO?
Call your township, borough or city office and ask for the Sewage Enforcement Officer for your local agency. If they do not handle permitting directly they will tell you which joint agency or county health department does.
Can I install my own septic system in Pennsylvania?
Yes. Unlike Georgia and Florida, Pennsylvania permits homeowner self-installation. The SEO must still approve the design and inspect the work, so the standards do not change.
What is a planning module?
A formal update to a municipality’s Act 537 Official Plan, generally required before a subdivision or new land development. DEP review commonly runs 60 to 120 days. Some subdivisions are exempt under 25 Pa. Code section 71.51(b).