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SepticSmart Program

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Onsite Wastewater Treatment System Regulation Changes

Regulation changes take effect June 1, 2014.

If your system has been impacted by the flood, please call 303-441-1564 to discuss any concerns you may have and to learn more about the repair permit process. Water quality specialists may also be available to visit your site to provide further guidance. You may also contact the Boulder County Flood Rebuilding and Permit Information Center at 303-441-1705 or

Groundwater Contamination

Septic systems are the second most frequently cited source of groundwater contamination in our country. Unapproved, aging, and failing septic systems have a large impact on the quality and safety of our water supply.

Find out more about the problem and strategies to protect our waters and the health of the community.

Septic System Approval

The deadline for approval of septic systems is December 31, 2023. Boulder County Public Health anticipates that most residents will have received approval of their system  before this deadline in order to ensure protection of our waters.

Property Transfer

After researching nationally how the issue of unapproved septic systems is being addressed, Boulder County Public Health discovered one common strategy was to require inspection of a property’s septic system at the time of property sale or transfer.

The Boulder County Board of Health adopted a property transfer regulation in 2008 to ensure that any issues with the septic system are disclosed to the new buyer, and that the existing owner or new buyer will make the repairs within one year of the closing date.

Risk Factors

There are many factors that put some areas with septic systems at greater risk than others. Boulder County Public Health has worked with experts to determine the areas in Boulder County that are at greater risk.

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