landscape with septicsmart logo 

SepticSmart Program

Check Septic Records

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.

Risk Factors

Many factors put some areas with septic systems at greater risk than others, including the age of the system, how many other systems are nearby, the type of soil and slope of the ground the system is on, and the distance of the system from drinking or ground water.

Septic System Approval

All septic systems in Boulder County must be reviewed and approved by Boulder County Public Health water quality staff to ensure they are properly constructed and in good working order. The deadline for systems not currently approved to receive approval is December 31, 2023. The deadline may be sooner for septic systems in areas at greater risk of contamination to water supplies.

The process for septic system final approval requires applying for a permit, soil analysis, and a site inspection.


Boulder County onsite wastewater treatment system regulations changed on June 1, 2014. The updates clarify and provide specificity to the regulations.

Property Transfer

Requiring an inspection of a property’s septic system at the time of property sale or transfer is one of the best strategies to assure systems are working properly and safely. 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.

2013 Flood Damage

Residents whose septic systems were impacted by the flood, can call 303-441-1564 to discuss any concerns and to learn more about the repair permit process. Water quality specialists may also be available to visit sites to provide further guidance. Residents may also contact the Boulder County Flood Rebuilding and Permit Information Center at 303-441-1705 or

 Related Links


SepticSmart Program

Submit a question


3450 Broadway
Map & Directions
Hours: 8 a.m.-4:30 p.m. M-F