Commission adds 500‑foot setback and effluent limit to wastewater ordinance; tables broader amendments

Garfield County planning commissioners voted to add a provision to the county's underground-wastewater‑disposal ordinance requiring any on‑site wastewater system installed within 500 feet of waters of the state to meet a total nitrogen effluent limit of no more than 30 milligrams per liter. The commission also agreed to postpone consideration of the broader set of proposed amendments for further study.

Caden, the county staff member who presented the item, framed the proposed changes as aimed at ‘‘groundwater protection’’ and told commissioners and the public that the language needed to explicitly require level‑3 or equivalent treatment within 500 feet of the Sevier River, Mammoth Creek and other mapped waters. He described one approach that adds a density control tied to minimum lot sizes (for example, permitting one septic per 10 acres in certain areas) to limit cumulative nitrogen loading.

Commissioners and dozens of members of the public debated technical and policy details for more than an hour. Speakers included residents with property in Pine Lake and Panguitch Lake areas, a representative of a local special service district who described the district’s approach to density and deed restrictions, and individuals who presented test data for alternative treatment systems. One commenter summarized testing that showed a suite of passive and alternative systems reducing nitrogen concentrations over time and urged the commission to adopt an effluent‑based standard and to write the ordinance to allow innovative systems that demonstrate results.

Public commenters raised concerns about the county’s most sensitive groundwater areas, including Panguitch Lake and Johns Valley, and urged the highest protection standard for areas mapped as pristine. Others representing property owners said the cost and regulatory hurdles for advanced systems or centralized sewer could be prohibitive and urged the commission to consider practical options such as shared sewer lagoons or alternative passive systems with documented nitrogen reductions.

After public testimony and questions, a commissioner moved to add a new Section 4 to the existing ordinance that would require any underground wastewater disposal system located within 500 feet of waters of the state to meet a total nitrogen effluent limit of 30 mg/L. The motion passed on a voice vote. Commissioners also agreed to hold the remainder of the proposed amendments for further drafting and stakeholder consultation and targeted a future meeting for additional review.

Staff told commissioners the amendments will be refined in consultation with the local health department, engineers, the state, and interested local districts; several speakers urged that the health department adopt clear testing pathways so systems that demonstrate results can be considered without years of uncertain review.

Commissioners said they expect revised language and additional technical analysis to return to a future meeting; staff mentioned aiming for the March meeting schedule but said timing will depend on staff workload and external reviews.