Septic Systems in Carroll County, IN

Regulations, costs, soil data & local providers

Pop. 20,306 ~33.6% on septic ~2,729 septic homes Well drained soil

Septic pumping in Carroll County, Indiana costs $250-$500 (avg $350). A new septic system installation costs $4,750-$9,500. USDA soil data rates 0% of county soils as suitable for septic absorption fields. Approximately 2,729 homes in this county use septic systems.

Septic System Costs in Carroll County

ServiceLowAverageHigh
Pumping / Cleaning$250$350$500
Routine Inspection$200$250$350
Real Estate Inspection$300$450$650
Minor Repair$600$850$4,200
Conventional Installation$4,750$6,800$9,500
Aerobic System Installation$8,900$12,750$17,850
Drainfield Replacement$4,750$6,800$9,500
Perc Test$700$1,000$1,400

Cost estimates based on regional market data for Carroll County, Indiana. Actual costs depend on system type, site conditions, and provider.

Soil & Septic Suitability in Carroll County

Drainage Class
Well drained
Hydrologic Group
B/D
Unique Soil Types
68
Avg Bedrock Depth
3.1 ft

Dominant Soil Types

Soil SeriesCoverageDrainageHydro Group
Ockley 376 Well drained B
Miami 335 Moderately well drained C
Sloan 303 Very poorly drained B/D
Milford 300 Very poorly drained C/D
Mahalasville 276 Poorly drained B/D

Septic Tank Absorption Field Suitability

USDA NRCS rates soil suitability for septic absorption fields across this county:

Not Limited (Good)0%
Somewhat Limited3.2%
Very Limited96.8%

Overall rating: Very limited

Source: USDA NRCS Soil Survey Geographic Database (SSURGO)

Groundwater & Water Table in Carroll County

Monitoring Wells
2
Avg Depth to Water
99.6 ft
Median Depth
117.5 ft
Shallowest Recorded
29.2 ft

Water table depths in this county are generally favorable for conventional septic systems.

Source: USGS National Water Information System. Based on 23 measurements from monitoring wells.

Septic Regulations & Permits in Carroll County

State Regulatory Body
Indiana Department of Health/Environment
Inspection Required for Home Sale
No / Varies
Nitrogen Reduction Areas
No
Advanced Treatment Required
No

Contact county health department for specific requirements.

Contact the Carroll County health department for current permit requirements, fees, and approved system types.

Septic System FAQ for Carroll County

How much does septic pumping cost in Carroll County?
Septic pumping in Carroll County, Indiana typically costs between $250 and $500, with an average of $350. Costs vary by tank size (1,000-1,500 gallons is typical), ease of access, distance from the pumping company, and how full the tank is. Most homeowners should pump their tank every 3-5 years.
How much does a new septic system cost in Carroll County?
A conventional septic system installation in Carroll County typically costs $4,750-$9,500. An aerobic treatment unit (ATU) costs $8,900-$17,850. Given the predominantly well drained soils in this area, some sites may require alternative system types. Costs include the tank, drainfield, permits, and labor.
Do I need a permit for a septic system in Carroll County?
Yes. Virtually all counties in Indiana require a permit before installing, repairing, or replacing a septic system. The permit process typically involves a soil evaluation or percolation test, system design by a licensed professional, application to the county health department, and one or more inspections during installation. Contact the Carroll County health department for current requirements and fees.
What soil types are in Carroll County and how do they affect septic systems?
Carroll County has predominantly Ockley, Miami, Sloan soils. The dominant drainage class is Well drained with hydrologic group B/D. The USDA rates 0% of surveyed soils as "Not Limited" for septic absorption fields, 3.2% as "Somewhat Limited", and 96.8% as "Very Limited".
How often should I pump my septic tank in Carroll County?
The EPA recommends pumping your septic tank every 3-5 years for a typical household. The exact frequency depends on tank size, household size, and water usage. A 1,000-gallon tank serving a family of 4 should generally be pumped every 3 years. Some counties in Indiana have mandatory pumping schedules — check with your local health department.
Can I install a conventional septic system in Carroll County?
It depends on your specific site. USDA soil data shows that 96.8% of soils in Carroll County are rated "Very Limited" for septic absorption fields, while only 0% are "Not Limited." This means many properties will require alternative systems such as mound systems, pressure distribution systems, or aerobic treatment units. A percolation test ($700-$1400) and soil evaluation are required before the county will approve a system design.
How long does a septic system last in Carroll County?
A well-maintained septic system in Carroll County typically lasts 25-30 years, though some components may need attention sooner. The concrete septic tank itself can last 40+ years, while the drainfield — the most critical and expensive component — usually lasts 15-25 years depending on soil conditions (Carroll County has predominantly well drained soils). Regular pumping every 3-5 years and avoiding excess water usage are the two most effective ways to extend system life.

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Quick Facts

Population20,306
Est. Septic Homes2,729
Avg Pumping Cost$350
Drainage ClassWell drained
Septic SuitabilityVery limited

Common Septic Services

Pumping: $250-$500
Inspection: $200-$350
Repair: $600-$4,200
Installation: $4,750-$9,500

Data last updated: 2026-04-13