New Septic Systems for Selma Properties
Whether you are building a new home in Selma or replacing a system that has reached the end of its life, septic installation is a project that starts with the soil. The right system depends on your lot, your soil and the size of your household.
Request a call and a local septic company that installs systems in Selma and Pine Level, Smithfield, Wilson's Mills will explain the process from site evaluation to final inspection.
How septic installation works
Most projects follow the same steps. First comes a site evaluation and soil test, then a system design sized for the home and a permit application. After that the tank and drain field are installed, followed by a final inspection before the system is covered. Your installer coordinates much of this, but timelines depend on local review and weather.
Septic system types and when they fit
A conventional gravity system works where soil drains well and there is room for a field. Where soil is shallow, wet or slow, designers turn to pressure distribution, mound systems, chamber systems, drip dispersal or aerobic treatment units. The soil test, not preference, usually decides which one a lot needs.
What the permit process involves
Most permit processes include a site and soil evaluation, a system design, plan approval and final inspection. Fees and timelines vary. Starting the process early, especially for new construction, keeps the project on schedule.
Why installation prices vary
Soil and site conditions drive most of the difference. A flat lot with deep, well-drained soil is simpler than a sloped lot with clay or high groundwater. Access for equipment and the distance from the house also matter.
After installation
Ask your installer for records, maintenance instructions and warranty details. Mark the tank and field location so they are not damaged by future projects. Some systems require a service contract, so confirm what applies to yours.
Before you sign
Make sure the contract lists the system type, the scope of work, permit responsibilities, the timeline, cleanup and warranty. Ask how weather or unexpected site conditions will be handled.
How long the whole project takes
The digging and installation often take days, but the full project in Selma can take several weeks once testing, design and permit review are included. Ask your installer for a realistic timeline for your county and what could change it, such as wet weather or a busy review office.
Mistakes to avoid on a Selma installation
The most expensive mistakes happen before the digging starts. Skipping the soil evaluation, choosing a system on price alone, or placing the drain field where future driveways, pools or additions will go all lead to trouble later. Undersizing the tank for the number of bedrooms is another common one. Ask your Selma installer to walk you through the site plan and explain why each part sits where it does.
New septic systems in Johnston County
New and replacement systems in Johnston County go through the Johnston County health department, which reviews designs and inspects the work. Soil conditions change from one part of the county to another, so a design that suits a lot in Selma may differ from one in Pine Level, Smithfield, Wilson's Mills. A local installer knows those differences.
What Selma's soil means for a new system
The USDA soil survey rates most mapped soils near Selma as very limited for septic absorption fields. New systems here often need a mound, pressure distribution or another engineered design, which your soil test will confirm. With about 49 inches of precipitation a year, designers here account for high water tables and runoff when sizing and placing a system.
Local conditions in Selma that affect septic installation
Among the mapped soils within about two miles of central Selma, the USDA soil survey rates 64% as very limited for septic absorption fields, 36% as somewhat limited and 0% as not limited. The most common drainage class is well drained. Soils like these often call for careful system design, such as a larger drain field, a mound or another engineered system, and a site evaluation before any new installation or replacement.
Selma averages about 49 inches of precipitation a year, and August is usually the wettest month. January is the coldest month at about 40°F on average, so freezing is rarely the main concern here. Heavy rain and saturated ground are the bigger factors for drain fields.
Sources: USDA NRCS Soil Survey (SSURGO), Soil Data Access; NASA POWER long-term climatology. Soil ratings describe mapped soil types near the city center and do not replace a site evaluation of your property.
What the soil around Selma means for septic installation
By drainage class, the USDA soil survey maps the land around Selma as 51% well drained, 21% poorly drained, 15% moderately well drained, 12% somewhat poorly drained. With 33% of the soil poorly drained, a new or replacement field here is often larger or raised, and a soil test comes before any design.
Source: USDA NRCS Soil Survey (SSURGO), Soil Data Access
Septic companies near Selma
These are the septic companies in our directory closest to Selma, with straight-line distance. Call any of them directly, or send one request and we will pass it to the best match.
- Phillips Backhoe Service, Clayton, NC, 7.1 mi
- Neuse River Septic LLC, Clayton, NC, 10.0 mi
- C's Septic Tank & Pumping LLC, Four Oaks, NC, 11.0 mi
- Creech's Septic Tank-Grease, Kenly, NC, 12.5 mi
- Johnsons Septic Service, Clayton, NC, 13.6 mi
- B & R Septic LLC, Pikeville, NC, 14.7 mi
Septic Installation in nearby towns
We also cover septic installation in these towns near Selma:
- Pine Level, 3.5 mi
- Smithfield, 3.6 mi
- Wilson's Mills, 5.1 mi
- Princeton, 8.9 mi
- Four Oaks, 9.6 mi
- Kenly, 10.1 mi
About Selma, NC
Selma is in Johnston County, North Carolina. About 7,012 people live there, across 5.4 square miles of land (about 1,297 per square mile).
Septic Installation questions in Selma
- How long does septic installation take?
- Installation itself often takes a few days to two weeks. Soil testing, design and permit review can add several weeks, so plan ahead.
- What is a mound system?
- A mound system raises the drain field above the natural soil using sand and fill. It is used where the soil is too shallow, too wet or too slow draining for a conventional field.
- Can a replacement system go in the same place?
- Sometimes. It depends on the condition of the soil in the old field and local rules. Many replacements use a new area of the yard.
- Is SepticTank.com the installer?
- No. SepticTank.com connects you with an independent local septic company that serves Selma. That company designs, installs and prices the system.