SepticRecord

Preble County

Septic services in Eldorado, Ohio

Operators based within 12 miles of Eldorado

Listed by where the business is, not by who it says it serves. Every operator here was on the ODH 2026 sewage treatment system bond lists on the date its record shows, and the address it is placed by comes from that same list, so this is a checkable claim rather than a service-area promise. An Ohio bond covers work in any health district in the state, though each district registers its contractors separately, so operators further out can work here too; these are simply the ones closest to you.

Crowell Plumbing

On the state bond list for 2026

Septic Tank Pumping · Septic System Repair · Septic Installation

Website
none

Marcus Excavation

On the state bond list for 2026

Septic System Repair · Septic Installation

Phone
not on file
Website
none

Soil and septic suitability around Eldorado

The USDA has already rated this ground for exactly one use: a septic tank absorption field. Within 4 miles of Eldorado — 32,040 acres across 76 soil map units — it rates 98.2% of the land very limited for that use and 0.1% somewhat limited, and almost none with no limitation at all.

What the limitation actually is

A rating on its own tells you nothing you can act on. The reasons do, and around Eldorado the leading one is depth to saturated zone on 97.4% of the mapped area, followed by slow water movement on 86.7%. In full:

Limiting featureShare of areaWhat it means on site
Depth to saturated zone97.4%A seasonal water table sits too close to the surface
Slow water movement86.7%Water moves through the soil too slowly for a drain field to keep up
Ponding31.7%Water stands on the surface
Seepage, bottom layer4.2%The layer beneath the trench is porous enough that effluent could reach groundwater without being filtered
Flooding2.2%The site floods often enough to matter

Shares overlap: most soils here are limited for more than one reason at once, so these do not sum to 98.3%.

The soils themselves

The named soils and land types that make up most of the ground around Eldorado. Crosby alone accounts for 26.6% of it.

Soil or land typeShareDrainageSlopeDepth to bedrockSeptic rating
Crosby26.6% Somewhat poorly drained 0 to 6% None in profile Very limited
Kokomo21.7% Very poorly drained 0 to 2% None in profile Very limited
Celina21.6% Moderately well drained 0 to 6% None in profile Very limited
Brookston8.3% Poorly drained 0 to 2% None in profile Very limited
Miamian8.1% Well drained 1 to 50% None in profile Very limited

“None in profile” means SSURGO records no bedrock or other restrictive layer within the depth it describes, not that none exists.

Area of interest: a 4-mile radius around the USGS Geographic Names centre point for Eldorado (GNIS 2398796, 39.9043, -84.6753), chosen because five of this state's communities are unincorporated and have no boundary to use, and because the lots that need a septic permit are in the ring around a town rather than inside it. Soil from USDA-NRCS Soil Data Access, SSURGO interpretation “ENG - Septic Tank Absorption Fields”, area-weighted by mapped acreage and by each component's share of its map unit. Survey areas: Darke County, Ohio (2025-08-27), Preble County, Ohio (2025-09-03). Retrieved 2026-09-18.

This is a survey, not an evaluation of your lot. The permit decision rests on the site evaluation ODH carries out for the specific parcel.

By service

Permitting in Preble County

In Preble County a septic (sewage treatment system) permit is issued by the local board of health, not by the state. The Ohio Department of Health writes the rules; the health district applies them and registers the contractors who work in it. See the Preble County detail →