Sourced from the Clarendon County Unified Development Code (2022), Clarendon County Water and Sewer, Clarendon County Planning and Zoning, and R.61-56 — last checked August 2026.
Who Issues Clarendon County Septic Permits
This is the part that surprises people moving to South Carolina from almost anywhere else: Clarendon County does not issue septic permits, and neither does any other South Carolina county. Onsite wastewater permitting is a state function.
The agency is the South Carolina Department of Environmental Services (SCDES), created on July 1, 2024 when Act 60 of 2023 split the old DHEC into SCDES for environmental programs and SC DPH for public health. Septic sits in SCDES’s Bureau of Regional and Laboratory Services.
Where the application goes: ATTN: OSWW, SCDES, 2600 Bull Street, Columbia, SC 29201
Statewide phone: 1-855-731-2504 (Onsite Wastewater Customer Service Center)
Online: epermitting.des.sc.gov
Form: D-1740, revision 07/2026
The Fee Is the Same in Every County: $150
Because permitting is centralized, there is one fee statewide. R.61-56 § 102.2: the Department “shall charge a fee of one hundred and fifty dollars ($150.00) to evaluate the site of a proposed onsite wastewater system.” That section was amended effective May 27, 2022. Payment is by check or money order to SCDES, and there is a $150 re-application fee if the application instructions are not followed.
There is a second route worth knowing about. You may hire a Professional Soil Classifier to do the evaluation privately, and the rules cap what they may charge at “no more than three (3) times SCDES’s fee” — so up to $450 (form DES 25-0011, dated 07/2025). People use it to skip the queue, and the queue is real: SCDES reported a 700-permit backlog in April 2023, and coastal counties have run six to fourteen weeks behind.
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The 200-Foot Rule
From the Clarendon County Unified Development Code, Article V, § 50.03(e): “All projects shall connect to a public sewer system when the transmission lines are accessible within 200 feet of any portion of the site and capacity is available.” Section 50.03(d) applies the same 200-foot trigger to public water.
Note the two conditions. The lines must be within 200 feet and capacity must be available — so a nearby line that is already at capacity does not compel connection. That second condition is worth asking about specifically, because it is the one a homeowner would never think to raise.
Note also “any portion of the site.” The measurement is not from your house or your proposed drainfield — it is from the nearest part of the parcel.
Lot Size Scales With What You Have
This is the more useful rule for anyone buying land, and it is unusually clearly written. Under § 50.02(b), minimum lot size for a single-family detached home in the SFR district depends entirely on infrastructure:
- 10,000 sq ft — public water and public sewer
- 20,000 sq ft — public water with private septic, or public sewer with a private well
- 30,000 sq ft — private septic and a private well
The logic is the 75-foot separation between drainfield and well: put both on one lot and the lot has to be big enough to hold them apart. The practical consequence is that county water at the road is worth 10,000 square feet of land in Clarendon County — which is real money before you have spent anything on soil work.
The Manufactured Home Sequence
§ 54.02(k): manufactured home installation permits are issued only after approval of the potable water system and the sewage effluent system by the state. So the septic permit is not a parallel task — it comes first, and the installation permit waits on it.
The Rule That Costs the Most Money: Six Inches
South Carolina requires a minimum vertical separation of six inches between the deepest point of effluent application and the zone of saturation — the level groundwater reaches — for systems under 1,500 gallons per day (R.61-56 § 200.3).
Six inches is remarkably little, and the comparison is the fastest way to understand it:
- South Carolina — 6 inches
- North Carolina — 18 inches on the coast, 12 inches inland
- Georgia — 24 inches
- Alabama — 24 inches
South Carolina permits systems on ground its neighbors would refuse. That is legal, and it is also why Clarendon borders Lake Marion, so wet-season groundwater is the figure that decides a lakeside lot.
The Repair Area Nobody Tells You About
Under R.61-56 § 200.7, a new system must reserve “a usable repair or replacement area equivalent to at least fifty (50) percent of the size of the original system” — 100 percent for community systems.
Read that as a land requirement, because that is what it is. Your lot has to hold the tank, the drainfield, and half a drainfield again in reserve, while still meeting every setback. On a tight lot that reserve area is what fails, not the drainfield itself. On a 30,000 square foot well-and-septic lot in Clarendon there is usually room; on an older, smaller platted lot there may not be.
Setbacks and Sizing in Clarendon County
These come from R.61-56 and apply identically statewide:
- 75 feet from a private well · 100 feet from a public well
- 75 feet from the mean high water line of a stream, canal or retention pond, and from a delineated critical area line (tidal waters and tidelands)
- 25 feet from a drainage ditch · 25 feet upslope of a basement
- 5 feet from a property line · 5 feet from a building
- Rock or a restrictive horizon must sit more than 12 inches below the deepest point of effluent application
There is no state minimum lot size for a septic lot. R.61-56 requires only that the lot be large enough to hold the system, the reserve area and the setbacks. Clarendon does set minimums, and they scale with infrastructure. From the Unified Development Code § 50.02(b), single-family detached in the SFR district: 10,000 square feet with public water and sewer; 20,000 square feet with public water plus private septic, or public sewer plus a well; and 30,000 square feet for private septic plus a private well. That last tier is three times the serviced minimum, and it is the one that applies to most rural building. We could not confirm whether these minimums extend beyond the SFR district.
When Sewer Blocks a Septic Permit
R.61-56 § 300 is blunt: “Permits for new onsite wastewater systems shall not be issued where a wastewater treatment facility is accessible for connection,” and the same bar applies to repairing or replacing a failing system.
But the state sets no distance. “Accessible” is defined only negatively — “where annexation or easements to cross adjacent property are required to connect… the wastewater treatment facility shall not be considered accessible.” So if connecting would require you to be annexed, or to cross a neighbor’s land, sewer is not accessible and your septic permit stands.
Clarendon County runs its own Water & Sewer department — 411 Sunset Drive, Manning, (803) 433-3255, with an after-hours line at (803) 553-5939. No customer counts are published, so we cannot tell you how much of the county is actually sewered. Planning and Zoning is at (803) 435-8672, Monday to Friday 8:30 to 5:00, and processes permits in 24 to 48 hours through CloudPermit — genuinely fast by the standards of this research.
What We Could Not Confirm
Article XVI, the Sewer Use Ordinance. This is the single most important document we could not read — it is a scanned image with no text layer, as are Article I and Article XIV (Potable Water). The Sewer Use Ordinance is the most likely place a second connection rule lives, so treat the 200-foot figure above as the rule we can verify rather than necessarily the only one.
The exact adoption date and ordinance number of the Unified Development Code. The county labels it “(2022)” and we could not do better than that.
Water and sewer customer counts, and any septic count or percentage. The “Clarendon Tomorrow: 2018–2028” comprehensive plan contains Table 2, “Permitted Wastewater Entities” and maps of the sewer and water systems — the most promising source we located and could not reach.
Where Clarendon County Sits
Manning anchors a county built around Lake Marion, with the interstate running through it and a great deal of rural land in between. Clarendon is unusual in this state for writing down the numbers other counties leave to the state — which makes it one of the easier places to work out, before you buy, whether a lot will actually take a system.
Nearby counties we cover: Kershaw County · Marion County. All of them run through the same state permit and the same $150 fee — what differs is the local ordinance layer, which is compared on our South Carolina septic permits by county page.
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