Drain Field Repair & Replacement · Snellville, GA
Drain field repair in Snellville, where fields laid in the 1980s and 1990s in Gwinnett's clay-rich soils are reaching the end of their working life.
- Georgia DPH-certified installer & pumper
- Residential & commercial
- Local shop in Oxford, GA
Get a free estimate
or call (678) 863-5620The short answer
How is a failing drain field repaired in Snellville, GA?
Drain field repair in Snellville needs a GNR Gwinnett repair permit, and GNR requires a Level 3 soil report before issuing it. Depending on what the soil and the old trenches show, the fix may be line cleaning, added trenches, or a full replacement field in a new spot. Everything is inspected by GNR before the trenches are covered.↗↗
Reviewed by Atlanta Water & Sewage Solutions · Last updated
The Snellville story
A generation of Snellville fields is wearing out at once
Half of Snellville's homes were built before 1991, the city's median year. The drain fields laid behind many of those houses are now thirty or more years old, and a field doesn't fail like a pipe breaks. It slows. Under each trench a biological mat forms in the top few inches of soil; fed by solids from an under-pumped tank, it thickens until the trench holds water instead of passing it.↗↗
Snellville's ground makes that slowdown matter. Clay-heavy, slowly permeable soils need more trench length than sandy ones to absorb the same flow, so a field that was barely adequate in 1990 has little margin once it starts to seal. Water that surfaces here heads downhill toward the Big Haynes Creek watershed, which drains 17.3 square miles above the Lenora Road gauge.↗↗
Half of Snellville's homes were built before 1991, the city's median year.
Soil & terrain
Soils a classifier is likely to log under Snellville fields
The Level 3 report decides how long and how deep new trenches can be. Across Gwinnett the survey is dominated by Piedmont soils weathered from gneiss and schist: loamy surfaces over clay subsoil on the uplands, with wet floodplain soils along creeks. Which one sits under your yard is the single biggest factor in what a repair costs.↗↗
Gwinnett series↗
Named for the county; the series was established in Gwinnett County in 1969 and is well drained, formed in saprolite from gneiss and schist.
Wedowee↗
About 15,180 acres in the county survey, one of its larger upland map units.
Madison↗
Two map units totaling roughly 24,440 acres countywide.
- Soil series · USDA NRCS
Local facts
Snellville field facts that shape the repair
Each row links to the agency, code or publisher it comes from. Tap a source to check it yourself.
| Topic | What it says | Source |
|---|---|---|
| Local soil namesake | The Gwinnett soil series was established in Gwinnett County in 1969. | USDA NRCS Official Soil Series Description — Gwinnett Series |
| Wedowee acreage | Wedowee soils cover about 15,180 acres of Gwinnett's survey area. | USDA NRCS Soil Data Access — GA135 (Gwinnett) map units by acreage |
| What the county says to keep off a field | No driving or parking over any part of the system, and no trees planted over the tank or drain field. | Gwinnett County DWR — Septic Tanks |
| Runoff | Gwinnett advises pointing rainfall runoff away from the tank and field. | Gwinnett County DWR — Septic Tanks |
Permits · GNR Public Health — Gwinnett Environmental Health, 455 Grayson Highway, Suite 600, Lawrenceville
Permitting a Snellville field repair
- 01
A Georgia-certified soil classifier prepares the Level 3 report for the repair area.↗
- 02
We lay out new trenches against Georgia's absorption-field setbacks, including 100 feet from any well, spring or sinkhole.↗
- 03
GNR reviews the application and visits the site, typically within about ten working days.↗
- 04
Trenches are dug and set to grade, then inspected open before any backfill.↗
What it costs
Drain field repair costs in the Snellville range
Drain field repair or rejuvenation
$1,000–$5,000
Typical market range — HomeGuide — How Much Does a Leach or Drain Field Replacement Cost? (2026), 2026
Replace leach lines
$20–$45 per linear foot
Typical market range — HomeGuide — How Much Does a Leach or Drain Field Replacement Cost? (2026), 2026
Drain field replacement
$3,000–$15,000
Typical market range — HomeGuide — How Much Does a Leach or Drain Field Replacement Cost? (2026), 2026
Septic field line cleaning
$600–$1,100
Typical market range — Angi — How Much Does It Cost to Clean Septic Field Lines? (updated Jul 9, 2026), 2026
What moves the price
These are third-party typical market ranges, not our prices. Every job is quoted after we see it — estimates are free.
Free estimate: (678) 863-5620- 01How much clay the classifier finds and the trench length it forces.
- 02Whether a clean area remains beside the old field.
- 03Mature trees, patios and fences sitting where new lines would go.
- 04Pumping and inspecting the tank so solids stop reaching the new field.
Warning signs
How a Snellville field tells you it's failing
Seeing two or more of these? Call before it gets worse.
- 1. Stripes of greener grass that follow the trench lines.
- 2. Wet, spongy ground over the field days after the last rain.
- 3. A sewage smell in the yard, strongest on humid evenings.
- 4. Drains slowing across the whole house, not one fixture.
- 5. Effluent seeping toward the curb or a neighbor's lower lot.
More about Snellville
House fields and business fields
A home field is sized by bedrooms, so a Snellville house that gained a finished basement or extra occupants may simply have outgrown its trenches. A commercial field is sized by the use, and any change of tenant can overload it; the commercial permit line on GNR's Gwinnett schedule is $600 rather than $275.↗↗
FAQ
Snellville drain field repair questions
Straight answers, with the rule or record behind them. Still unsure? Call and ask the crew that digs.
(678) 863-5620Do I need a permit to repair a drain field in Snellville?
Yes. Georgia requires field repairs to be permitted and inspected, and GNR's Gwinnett office issues the permit.
Source: Georgia DPH Rules Chapter 511-3-1, On-Site Sewage Management Systems (Jan 2016)
Why does the soil report matter so much?
Field size depends on the soil, and clayey, slowly permeable soils need a larger field than sandy ones.
Source: NC State Extension — Septic Systems and Their Maintenance
Can a failing field be cleaned instead of replaced?
Sometimes. Field line cleaning runs about $600 to $1,100 per Angi; a sealed biomat in clay may still need new trenches.
Source: Angi — How Much Does It Cost to Clean Septic Field Lines? (updated Jul 9, 2026)
Can I park a trailer on the drain field while it recovers?
No. Gwinnett advises against driving or parking over any part of a septic system.
What does replacing a whole field cost?
HomeGuide's 2026 range for drain field replacement is $3,000 to $15,000.
Source: HomeGuide — How Much Does a Leach or Drain Field Replacement Cost? (2026)
Will new trees help dry out a wet field?
No. Gwinnett says not to plant trees over the tank or drain field; roots invade the lines.
How long does GNR take to approve a field repair?
About ten working days to review and visit after a complete application.
Source: GNR Residential Septic System Repair Permit Application and Requirements (Rev. 2024-05-03)
Sources
Where these facts come from
Rules, costs and local facts on this page link to the agency, code or publisher that states them. Cost figures are third-party market ranges, not our prices — estimates are free.
Reviewed by Atlanta Water & Sewage Solutions · Last updated
- 1GNR Public Health — Septic Systems
- 2GNR Residential Septic System Repair Permit Application and Requirements (Rev. 2024-05-03)
- 3Census Reporter: Snellville, GA (ACS 2024 5-year)
- 4NC State Extension — Septic Systems and Their Maintenance
- 5USGS — Big Haynes Creek at Lenora Road, near Snellville, GA
- 6USDA NRCS Soil Data Access — GA135 (Gwinnett) map units by acreage
- 7USDA NRCS Official Soil Series Description — Gwinnett Series
- 8Gwinnett County DWR — Septic Tanks
- 9Georgia DPH Rules Chapter 511-3-1, On-Site Sewage Management Systems (Jan 2016)
- 10GNR Environmental Health Fee Schedule — Gwinnett County (effective Jan 1, 2026)
- 11HomeGuide — How Much Does a Leach or Drain Field Replacement Cost? (2026)
- 12Angi — How Much Does It Cost to Clean Septic Field Lines? (updated Jul 9, 2026)
Ready when you are
Soggy stripes across a Snellville yard? The field is talking.
We'll check the tank, probe the trenches and walk you through the soil report and GNR permit, with a free on-site estimate.
(678) 863-5620- Georgia DPH-certified installer & pumper
- Residential & commercial
- Oxford, GA
Free estimate
or call (678) 863-5620