Septic Systems (On-site Wastewater Treatment Systems)

The most reliable and cost-effective means of disposing of domestic sewage is an adequate public sewer system. It is the policy of the Weld County Board of Public Health and the Board of Weld County Commissioners to require the use of public sewer systems where and whenever feasible and to limit the installation of on-site wastewater treatment systems (OWTS) to areas that are not feasible for public sewers. Because many areas of Weld County are too sparsely populated to be economically served by public sewers, on-site wastewater treatment systems have become a common method of domestic sewage disposal. To preserve the environment and protect the public health, the Weld County Board of Public Health and the  Board of Weld County Commissioners have adopted regulations setting minimum standards for the design and construction of on-site wastewater treatment systems.


The Weld County Department of Public Health and Environment offers the following services relating to septic system installation, use, and abandonment:

  • Reviews of engineer reports for before and after installation
  • Loan approval inspections for sale or re-finance
  • Evaluations of existing systems for changes in use (home remodel, medical hardships, etc).
  • Complaint investigations
  • Licensure of septic system installers and cleaners
  • Reviews of land use applications for planning-related issues (subdivisions, special use permits)

Please submit all paperwork to the Environmental Health Services Office in person during regular business hours.