Septic pumping in Macon County, Missouri 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 1,825 homes in this county use septic systems.
Septic System Costs in Macon County
| Service | Low | Average | High |
|---|---|---|---|
| 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 Macon County, Missouri. Actual costs depend on system type, site conditions, and provider.
Soil & Septic Suitability in Macon County
Drainage Class
Moderately well drained
Hydrologic Group
D
Unique Soil Types
59
Avg Bedrock Depth
2.8 ft
Dominant Soil Types
| Soil Series | Coverage | Drainage | Hydro Group |
|---|---|---|---|
| Winnegan | 599 | Moderately well drained | D |
| Purdin | 550 | Moderately well drained | D |
| Armstrong | 494 | Somewhat poorly drained | C/D |
| Keswick | 490 | Moderately well drained | D |
| Dockery | 406 | Somewhat poorly drained | B/D |
Septic Tank Absorption Field Suitability
USDA NRCS rates soil suitability for septic absorption fields across this county:
Overall rating: Very limited
Groundwater & Water Table in Macon County
Monitoring Wells
1
Avg Depth to Water
2.4 ft
Median Depth
2 ft
Shallowest Recorded
1.6 ft Shallow Risk
Shallow water table detected. Mound systems or aerobic treatment units may be required.
Source: USGS National Water Information System. Based on 8 measurements from monitoring wells.
Septic Regulations & Permits in Macon County
State Regulatory Body
Missouri 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 Macon County health department for current permit requirements, fees, and approved system types.
Septic System FAQ for Macon County
How much does septic pumping cost in Macon County?
Septic pumping in Macon County, Missouri 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 Macon County?
A conventional septic system installation in Macon County typically costs $4,750-$9,500. An aerobic treatment unit (ATU) costs $8,900-$17,850. Given the predominantly moderately 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 Macon County?
Yes. Virtually all counties in Missouri 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 Macon County health department for current requirements and fees.
What soil types are in Macon County and how do they affect septic systems?
Macon County has predominantly Winnegan, Purdin, Armstrong soils. The dominant drainage class is Moderately well drained with hydrologic group D. The USDA rates 0% of surveyed soils as "Not Limited" for septic absorption fields, 0% as "Somewhat Limited", and 100% as "Very Limited".
How often should I pump my septic tank in Macon 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 Missouri have mandatory pumping schedules — check with your local health department.
Does the water table in Macon County affect septic systems?
Yes. The average groundwater depth in Macon County is approximately 2.4 feet, based on USGS monitoring data from 1 wells. This shallow water table means conventional gravity-fed septic systems may not be suitable for many sites. Mound systems or aerobic treatment units are commonly required to maintain adequate separation between the drainfield and groundwater.
Can I install a conventional septic system in Macon County?
It depends on your specific site. USDA soil data shows that 100% of soils in Macon 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 Macon County?
A well-maintained septic system in Macon 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 (Macon County has predominantly moderately well drained soils). Regular pumping every 3-5 years and avoiding excess water usage are the two most effective ways to extend system life.
Data last updated: 2026-04-13