Septic System Installation in New London, CT
Replacing a failed system or installing one for a new build in New London involves more than digging a hole for a tank. Soil testing, system design, permits and inspections all shape the final result.
A local installer can tell you which system types are likely to work on your lot and what the process looks like.
The steps of a new septic installation
Expect five stages: site and soil evaluation, system design, permit approval, construction, and inspection before the trenches are covered. Weather and permit review times affect the schedule more than the digging itself, which often takes only a few days once everything is approved.
Choosing a system for your lot
Your lot decides more than your budget does. Good, deep soil allows a conventional tank and field. Tight lots, high water tables and clay often call for an engineered option such as a mound, pressure dosed field or aerobic unit. A designer explains which systems are allowed on your property.
The permit process for a new system
Installing or replacing a septic system almost always needs approval from the Southeastern Connecticut Planning Region health department or the state agency that oversees septic systems. The usual steps are a soil evaluation, a stamped design, plan review and one or more inspections during construction. Starting without a permit can mean digging it all up again.
Why installation prices vary
Installation price depends on the system type the soil allows, the size of the house, the distance from the house to the field, how easy the site is to reach with equipment, and design and permit fees. Engineered systems such as mounds and aerobic units cost more to build and maintain.
The first years with a new system
Keep the design drawing and the final inspection report somewhere safe. Pump on the schedule your installer recommends, use water steadily rather than all at once, and keep vehicles and new structures off the tank and field. Let grass establish over the field before heavy use of the yard.
Questions to ask an installer
Ask who performs the soil evaluation and design, whether they handle permits, what system types they recommend and why, and how long the project will take. Ask about warranty terms and what maintenance the system will need.
How long a new system takes near New London
Soil testing, design and permit review usually take longer than construction. In Southeastern Connecticut Planning Region, wet seasons and frozen ground can delay soil evaluations, and review times vary through the year. Once the permit is in hand, most installations take a few days to a couple of weeks.
Mistakes to avoid on a New London 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 New London installer to walk you through the site plan and explain why each part sits where it does.
Planning a new system near New London
A new septic system near New London starts with a site visit and a soil evaluation. Those results decide the system type, the tank size and where the drain field can go. Southeastern Connecticut Planning Region reviews the design before work begins and inspects it before it is covered. Planning early keeps the project from holding up a closing or a build.
What New London's soil means for a new system
The USDA soil survey rates most mapped soils near New London 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 46 inches of precipitation a year, designers here account for high water tables and runoff when sizing and placing a system. About 2 months below freezing mean pipes and components must sit deep enough or be insulated, and installation is usually easiest outside winter.
Local conditions in New London that affect septic installation
Among the mapped soils within about two miles of central New London, the USDA soil survey rates 92% as very limited for septic absorption fields, 8% 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.
New London averages about 46 inches of precipitation a year, and October is usually the wettest month. Average temperatures stay below freezing for about 2 months a year, with January averaging 29°F, so tank lids and shallow lines benefit from a layer of snow or mulch rather than being cleared bare.
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 New London means for septic installation
By drainage class, the USDA soil survey maps the land around New London as 49% well drained, 23% moderately well drained, 16% very poorly drained, 4% poorly drained, 4% excessively drained, 3% somewhat excessively drained. With 20% 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 New London
These are the septic companies in our directory closest to New London, with straight-line distance. Call any of them directly, or send one request and we will pass it to the best match.
- Lyon Pools, Groton, CT, 2.5 mi
- Buttermore's LLC, Gales Ferry, CT, 7.7 mi
- New London County Septic Service, Ledyard, CT, 8.3 mi
- Bennet Excavating, Ledyard, CT, 8.5 mi
- P & H Septic Service LLC, Uncasville, CT, 8.7 mi
- Shoreline Sanitation, Old Lyme, CT, 9.2 mi
Septic Installation in nearby towns
We also cover septic installation in these towns near New London:
About New London, CT
New London is in Southeastern Connecticut Planning Region, Connecticut. About 27,560 people live there, across 5.6 square miles of land (about 4,915 per square mile).
Septic Installation questions in New London
- Can I install a septic system myself?
- Most areas require licensed designers or installers and inspections. Check with the Southeastern Connecticut Planning Region health department before planning any work yourself.
- How big does my septic tank need to be?
- Tank size is usually based on the number of bedrooms and local code. Your designer will size the tank and field for your home.
- 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 New London. That company designs, installs and prices the system.