Wastewater treatment systems – Environmental Health
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Onsite wastewater treatment systems (OWTS)

(Historically known as ‘septic systems’)

All new, repaired, and altered wastewater treatment systems in Garfield County need to be designed and installed based on the current Garfield County OWTS regulations. The new regulation is in effect on May 28, 2026.

New OWTS regulation,
effective May 28, 2026

On April 13, 2026, the Garfield County Board of Health adopted new OWTS regulations. Learn more about these changes.



OWTS permit and application

When altering, repairing or installing an OWTS, you will need to submit an Onsite Wastewater Treatment System application, along with a completed site and soil evaluation, system design, and site plan.

Submit an application

Permit applications may be submitted by email or in person to:
Garfield County Public Health
2014 Blake Ave.
Glenwood Springs, CO 81601
970-625-5200, ext. 8150
Email

Permit applications may also be picked up and turned in to:
Garfield County Community Development
108 8th St., Suite 401
Glenwood Springs, CO 81601
970-945-8212

OWTS rules and regulations

The Colorado Department of Public Health and Environmental (CDPHE), through the authority of the Onsite Wastewater Treatment Systems Act, oversees the adoption and enforcement of the OWTS rules and regulations.
Rulemaking process and CDPHE oversight