Level 2 Fire Restrictions in effect for western/mountain areas of Boulder County. No fireworks, fires, open flame, or shooting (see map and flyer).

Many County services are being offered online. Additionally, a variety of resources are available for those impacted by COVID-19.

Septic Regulations, Fees, & Forms
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Onsite Wastewater Treatment Systems: Regulations, Fees, & Forms


Regulation of onsite wastewater is done at the local level. Boulder County Public Health (BCPH) 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.



Licensed OWS Professionals


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.

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SepticSmart Program

Main: 303-441-1564
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Hours: 8 a.m. - 4:30 p.m. M-F