Petersen Onsite

Petersen Onsite Petersen Onsite provides products, services, consulting, & management for onsite wastewater treatment

Labor Day is a time to recognize and appreciate the hard work and dedication of American workers. Petersen employees, co...
09/07/2026

Labor Day is a time to recognize and appreciate the hard work and dedication of American workers. Petersen employees, colleagues, and partners have created a work environment of determination and dedication that we are proud to be a part of!

We thank all the hardworking men and women out there!
Happy Labor Day from Petersen Onsite!

Concrete riser installation on a concrete septic tank provides convenient access for inspection, maintenance, and servic...
09/04/2026

Concrete riser installation on a concrete septic tank provides convenient access for inspection, maintenance, and servicing of the tank. A properly fitted riser creates a durable, secure connection while keeping the tank access at a practical level. Quality workmanship is part of every wastewater treatment system installation.

A look at a FAST wastewater treatment system installation.
08/21/2026

A look at a FAST wastewater treatment system installation.

08/17/2026

A FAST wastewater treatment system doesn’t need to stand out to get the job done. The septic risers, blower box, and con...
08/14/2026

A FAST wastewater treatment system doesn’t need to stand out to get the job done. The septic risers, blower box, and control panel provide the access and components needed for reliable operation and maintenance.

Located at the inlet and outlet of the tank, septic baffles help control the flow of wastewater and prevent solids and f...
08/11/2026

Located at the inlet and outlet of the tank, septic baffles help control the flow of wastewater and prevent solids and floating scum from leaving the tank too soon.

The inlet baffle directs incoming wastewater into the tank to reduce disturbance, while the outlet baffle helps keep solids in the tank and allows properly settled effluent to move on to the next stage of treatment.

Small components like baffles make a big difference in protecting the performance and longevity of a septic system.

08/09/2026
A FAST wastewater treatment system surrounded by the trees.Once everything is in place, only the essential components re...
08/07/2026

A FAST wastewater treatment system surrounded by the trees.
Once everything is in place, only the essential components remain visible. Noticable in the photo, the access covers, control panel, and aerator pump are all easily accessible for future maintenance.

Onsite wastewater treatment systems start with solid site preparation.These photos show the excavation completed for a F...
08/05/2026

Onsite wastewater treatment systems start with solid site preparation.
These photos show the excavation completed for a FAST wastewater treatment system installation. FAST systems use fixed-film technology to provide efficient, reliable wastewater treatment in a compact design.
A well-prepared site helps to set up for a successful installation.

You can have a beautiful yard and an accessible septic system. Decorative rocks, mulch, ornamental grasses, or removable...
07/31/2026

You can have a beautiful yard and an accessible septic system. Decorative rocks, mulch, ornamental grasses, or removable planters are great ways to help risers blend into your landscape without blocking access! The right landscaping can create a clean, attractive look while keeping the system easy to service for years to come.

Address

Fredonia, WI
53021

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