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Polkoski Soil 2 Septic

Serving Bayfield, Douglas, an Ashland counties in Wisconsin.  We are the Northland's premier Septic System Design and Installation experts.


Certified Soil Testing - What is a Soil Test?

Certified soil testing for Private Onsite Wastewater Treatment Systems (POWTS), aka Septic Systems, is mandatory in WI and must be completed before POWTS design begins. Soil is tested by excavating test pits, which provides a clear view of the soil horizons/layers. Each horizon is documented by depth, boundary type, Munsell color, redoximorphic features, texture class (percent of sand, silt, and clay based on the USDA soil classification system), sand particle size, rock fragments (size and quantity), ped structure (grade, size, and shape), consistence (crushing force), and root content.


Soil Test Pit Excavation


Conventional Septic System Logical View

WIESER Septic Tanks

Wieser concrete tank installation for residential POWTS Herbster, WI. We use Wieser tanks exclusively for all POWTS and commercial installations. They are the best in the business since 1965.

Wieser Concrete


Wieser Concrete Tank Installation

Infiltrator Chambers

Gravity fed Infiltrator Water Technologies Leachfield Chambers installed as the final treatment and dispersal component after the Wieser septic tank initial separation and treatment.  


Infiltrator Chamber Cell Backfill

Conventional System

Conventional gravity flow installation.


Ready for WI DSPS - County Zoning Inspection

Job complete

Job finished with KY Bluegrass mix seed and covered with straw shredded by our Goossen Bale Chopper/Blower.  Lake Superior in Port Wing, WI  

Our Services

WI DSPS Certified Soil Testing

Septic System Design & Installation

High-Strength Pretreatment Systems  

RTK GNSS Site Planning & Mapping

Residential and Commercial Services

WI Sanitary Permits

About Polkoski Soil 2 Septic

Established in 1976 with over 50 years of combined experience in soil testing and septic system installations. We’re dedicated to delivering the highest quality service in Wisconsin. We are certified professionals, ensuring that your systems are installed safely, effectively, and legally for your peace of mind.