Boulder County
Public Health
3450 Broadway
Boulder, CO 80304
(303) 441-1100

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OWS Regulations

• Regulation of onsite wastewater is done at the local level. Boulder County Public Health regulations govern all OWS in Boulder County. These regulations incorporate the guidelines established by the Colorado Department of Public Health and Environment (CDPHE); however, they are more stringent in some areas.
• Boulder County Regulations (PDF 976 KB)
• Colorado Regulations (PDF 422 KB)
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• Fees

• OWS Fees
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• Guidelines

• National Onsite Wastewater Recycling Association, Inc. (NOWRA) Model Code
• EPA Guidelines and General Guidance
• CDPHE Recommendations of the Individual Sewage Disposal System Steering Committee [February 14, 2002] (PDF 210 KB)
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• Licensed OWS Professionals

• Engineer List (PDF 52 KB)
• Installers List (PDF 60 KB)
• Cleaners List (PDF 38 KB)
• Inspectors List (PDF 42KB)
• Information for Professionals

Forms

OWS forms

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Please Note: This information is intended to provide a better understanding of the functions of onsite wastewater treatment and the need for proper design, installation, and maintenance. Always consult a licensed professional or public health official with questions regarding engineering, installation, and servicing of onsite wastewater systems.