Septic System Service in Boulder, CO
Sullivan Septic & Excavating offers complete septic system service in Boulder, CO, from routine tank pumping and cleaning to full inspections, repairs, and new installations. Whether you are a homeowner in Niwot, a rural property owner near Lyons, or a business in Erie or Longmont, the team brings more than 30 years of hands-on experience to every job. Call (303) 772-4019 today to schedule service and protect your property.

What Septic Services Does Sullivan Septic & Excavating Offer in Boulder?
Sullivan Septic & Excavating provides a full range of septic services for Boulder County residential and commercial customers, handling everything from routine maintenance to complex excavating projects.
Services available include:
▸Septic tank pumping and cleaning to remove buildup and prevent costly backups.
▸Septic system inspections for real estate transactions, routine checkups, and Boulder County compliance reporting.
▸Septic system repairs and installation covering leach field issues, tank replacements, and new system builds.
▸Boulder County OWTS inspections aligned with the SepticSmart program's property transfer requirements.
▸Drain cleaning and hydro-jetting sewer line services<https://www.sullivanseptic.net/hydro-jetting-sewer-line-services> for stubborn blockages.
▸Sewer camera scoping to identify root intrusion, cracks, and line failures without guesswork.
▸Grease trap service for commercial accounts throughout Boulder County.
One call can cover pumping, inspection, and minor repairs in a single visit. Contact Sullivan Septic & Excavating at
(303) 772-4019 to find out which septic system service your property needs.
Is Boulder County Septic Compliance Required for Property Sales?
Yes. Boulder County Public Health governs all onsite wastewater treatment systems (OWTS) under rules that are often more stringent than the Colorado state baseline under CDPHE Regulation 43. When you sell or transfer property, an approved and adequately operating septic system must be confirmed at closing, or the buyer must sign a written agreement to complete repairs within one year.
Sullivan Septic & Excavating is licensed under the Boulder County SepticSmart program and familiar with the Property Transfer Certificate process. The team can perform your inspection, document findings, and help submit the required report to Boulder County Public Health at 3450 Broadway, Boulder, CO 80304. Getting ahead of this requirement before listing can save time and avoid closing delays.
How Boulder County Terrain Affects Your Septic System
Boulder County's varied terrain creates unique challenges for septic systems. Foothills properties near Lyons and along the St. Vrain Canyon corridor often sit on rocky, shallow soils that limit leach field depth. Lower-elevation areas around Erie and Niwot can have seasonally high groundwater tables, a condition for which Boulder County sets special OWTS permit requirements. Clay-heavy soils common on the plains can slow drainage and strain older systems. These local conditions make regular inspections and professional pumping especially important, and they are a key reason why scheduling septic system service in Boulder with a locally experienced team matters.
How the Service Process Works
Getting started with septic system service in Boulder, CO, is straightforward:
1. Call (303) 772-4019 or use the contact form to describe your system and schedule a visit.
2. A licensed technician arrives to assess your system, locate the tank, and identify visible issues.
3. The team performs the requested service using modern equipment.
4. You receive a clear summary of findings and any follow-up recommendations, including compliance documentation if required by Boulder County.
5. For ongoing maintenance, the team can set up a regular pumping schedule to keep your system healthy year-round.
Licensed, Certified, and Locally Trusted
Sullivan Septic & Excavating is a family-owned business serving Boulder and the surrounding region since 1994. The company holds active licenses from Boulder County Public Health for OWTS installation, inspection, and cleaning, as well as licenses through Larimer County Environmental Health Services and Weld County Public Health. Technicians hold NAWT certification and CPOW credentials, ensuring every job meets current county and state standards.
The business serves residential and commercial customers across Boulder, Longmont, Lyons, Erie, Niwot, and communities throughout Boulder, Larimer, and Weld counties. Read reviews at
Sullivan Septic & Excavating on Google.
Frequently Asked Questions
How Often Should a Septic Tank Be Pumped in Boulder County?
Most residential septic tanks in Boulder County need pumping every three to five years, though frequency depends on household size and system capacity. Larger households or properties with heavy use may need more frequent service.
What Is the Boulder County SepticSmart Program?
SepticSmart is Boulder County Public Health's licensing and inspection framework for all OWTS in the county. It governs who can legally inspect, install, and clean septic systems and requires a Property Transfer Certificate for most real estate transactions involving a septic system.
Do I Need a Permit to Repair My Septic System in Boulder, CO?
Many septic repairs require a permit from Boulder County Public Health, particularly for component replacements or work that changes system capacity. Sullivan Septic & Excavating can help determine which permit applies before work begins.
What Should I Do if My Septic System Is Backing Up?
A backed-up system may need immediate pumping, drain cleaning, or a thorough inspection to rule out leach field failure. Call (303) 772-4019 right away so a licensed technician can assess the situation.
Does Sullivan Septic Serve Areas Outside Boulder City Limits?
Yes. Sullivan Septic & Excavating serves customers throughout Boulder County and beyond, including Longmont, Lyons, Erie, Niwot, and communities in Larimer and Weld counties.
Schedule Your Septic System Service in Boulder Today
From routine
septic system maintenance to urgent repairs, Sullivan Septic & Excavating brings decades of local experience to every call. Reach out at
(303) 772-4019, visit the
contact page, or explore
residential services to learn more. Service is available Monday through Friday, 8:00 AM to 5:00 PM.



