Onsite Wastewater 2024 Fall Update

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September 13, 2024

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Welcome to the St. Louis County Onsite Wastewater news. You are receiving this message because you have signed up for updates with the St. Louis County Planning and Zoning Department. This resource will keep you updated with information about Onsite Wastewater news.

Permit Activity Update

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The On-Site Wastewater Division has seen very steady and consistent permit numbers again this construction season. To date for the 2024 season, the division has received and processed 586 septic permits to construct, 635 compliance inspections, and 296 operating permits and operating permit renewals. We strive to continue to provide excellent customer service and issuing permits within a timely manner. Environmental Specialists continue to conduct final inspections as septic system installations are completed throughout the season. As a reminder, please contact the division 48 hours in advance during normal business hours to schedule a final inspection. 


Winter Installs: Soil Verification

With the fall season upon us, we encourage designers and installers to get soil verifications completed now before it becomes too difficult to do so. Soil verifications become increasingly difficult to complete with confidence due to sun angles lowering and the possibility of frost/freezing conditions. Contractors intending to install a system during the onset of the winter months should contact the On-Site Wastewater Division as soon as possible regarding soil verifications and proactively navigating the SLC Frozen Ground Installation Policy.  


The University of Minnesota to Host a Free Septic Training Focused Toward Homeowner Education

The University of Minnesota Onsite Sewage Treatment Program will offer a free training opportunity on ‘Being Septic Smart’ in September to celebrate SepticSmart Week (September 16-20, 2024).

An online webinar will be held on Tuesday, September 17, from 7 to 9 p.m. The ‘Being Septic Smart’ webinar teaches property owners the basics about how their septic systems work, including how to care for and maintain a septic system so it can function during or beyond its design lifetime.

Septic systems are designed to last 20-30 years but can last longer depending on use, care, and maintenance. Being Septic Smart provides information that enables property owners to maximize their septic investment so their system can function during and beyond its design lifetime, with information that includes:

  • How a septic system works
  • The purpose of the septic tank and drain field or mound
  • How a properly operating septic system protects ground and surface water
  • How often the septic tank should be pumped
  • Whether additives are a good idea
  • How to prevent winter freeze-ups, and much more

While the webinar is free, participants must register to obtain the webinar link for the event.

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Point of Sale Requirements During the Winter Season

Please be mindful that frozen ground conditions enact the winter season point of sale requirements. As a friendly reminder, if a system is over 10 years old and hasn't had a compliance inspection in the last three years, the following are required for point of sale transactions: 

  • Completed Transfer Agreement Form 3030
  • Estimate from a licensed and certified installer for the replacement of the system
  • Escrowing 100% of said estimate at the time of closing until conditions allow for a compliance inspection 

IMPORTANT NOTE: If any questions arise regarding this process, we highly encourage you to contact the Onsite Wastewater Division to confirm the proper steps are being followed. This quick verification can prevent major issues for sellers, buyers, realtors, and closing agencies alike in the future. 


County Forms and Submittal Requirements

To better serve you in a timely manner with increased consistency and efficiency, Onsite Wastewater will require the use of our most up-to-date forms, such as the SSTS application and design summary, St. Louis County compliance inspection report and MPCA compliance inspection report, and operating permit renewal, etc. All of the updated forms have been uploaded onto the Onsite Wastewater website for septic professionals to download. Additionally, Onsite Wastewater will require installer documents, such as as-built drawings, abandonments, and pressure tests, during the final inspection within the required time frames.

Below are a couple important requirement reminders for installation contractors:

  • Ensure all work is done according to the approved design report.

St. Louis County understands that during the construction of a septic system, issues can arise that may require an alteration of the approved design. When this occurs, the County and the designer need to be notified before the alteration occurs so design changes and permit approvals can be made. Communication with the County and the designer will go a long way in preventing undesirable situations.

  • Provide as-built drawings, in addition to other installer documents, if necessary, to the owner and local unit of government per required time frames.

As-builts are required to be submitted to St. Louis County. If you have any questions regarding this process, please call the County offices for clarification.

IMPORTANT NOTE: Separate checks or fee payment required per application. Onsite Wastewater is no longer accepting single check payments for multiple applications. 


Contact Us

Onsite Wastewater

If you have any questions about Onsite Wastewater or septic systems, please contact us:

(218) 471-7103
Email: oswinfo@stlouiscountymn.gov