Restaurants in Old Town and near Colorado State University often run older interceptors that sit under concrete slabs or in tight mechanical rooms. When these units overflow, grease and wastewater can back up into floor drains and reach the public right-of-way along College Avenue or Mountain Avenue. Our crews contain the spill first, then pump the interceptor using equipment sized for the 500- to 2,000-gallon units common in Larimer County kitchens. We track local health-department notification rules so the restaurant can reopen without extended closure.
Semi-arid summers dry out vent lines while cold winter nights drop temperatures below freezing, causing grease to set hard in laterals that run under Prospect Park and Harmony neighborhoods. This combination creates sudden overflows after a busy Friday night service. We use heated hoses and enzyme treatments formulated for the region’s hard water to break down the solidified layer without damaging older clay or cast-iron piping found in buildings near Old Town Square.
Horsetooth Reservoir and the surrounding foothills create elevation changes that affect how quickly backups travel. A spill on a slight downhill grade can reach storm drains faster than crews expect. We carry absorbent booms and wet-vac units rated for commercial volumes and always verify that recovered material is hauled to approved Larimer County disposal sites. Every job ends with a written report that the restaurant can forward to the health inspector.
Technician insight
In Fort Collins the thing that catches most people out with grease interceptor overflow cleanup is how our cold winters make grease set up solid in the laterals under older Old Town buildings; once it freezes the backup travels farther and faster than crews expect, especially on the slight grades near Horsetooth Reservoir.
Saturday Night Backup at a Harmony Restaurant
A kitchen on Harmony Road experienced a sudden backup during peak service. We found the 1,000-gallon interceptor full and grease had migrated into two floor drains. Our crew pumped the unit, cleared the lines with heated equipment, sanitized the area, and supplied the required report for the health department before the next lunch shift.
Grease Interceptor Overflow Cleanup Services We Offer
✓Emergency Overflow Response
On-site containment and pumping within hours for restaurants in Old Town and Downtown experiencing sudden interceptor backups during service hours.
✓Post-Overflow Interceptor Pumping
Complete removal of grease, solids and wastewater from 500- to 2,000-gallon units common in Fort Collins commercial kitchens after an overflow event.
✓Floor Drain Remediation
Clearing and sanitizing connected floor drains and laterals in Prospect Park and Harmony properties where overflow has migrated beyond the interceptor.
✓Health Department Compliance Cleanup
Documentation and cleaning that meets Larimer County requirements for restaurants near Colorado State University and Old Town Square after an overflow incident.
✓Winter Freeze-Related Overflow Service
Specialized pumping and line thawing for interceptors affected by cold-weather grease solidification in buildings across Fort Collins and nearby Windsor.
Grease Interceptor Overflow Cleanup Cost in Fort Collins, CO
| Service | Typical Range | What Affects It |
|---|---|---|
| Standard Overflow Pumping | $450–$850 | Typical 500–1,000 gallon unit in accessible location |
| Emergency After-Hours Response | $650–$1,100 | Calls outside Mon–Fri 8–6 or Sat 9–2 |
| Floor Drain and Lateral Clearing | $300–$600 | Additional per line when overflow has migrated |
| Winter Freeze Thaw Add-On | $200–$400 | Heated equipment for solidified grease in cold weather |
Ranges are typical for Fort Collins, CO and confirmed with an exact written quote before any work starts.
How it works
- 1
Site Assessment
We inspect the interceptor, connected drains and surrounding floor areas to determine the extent of the overflow and any impact on nearby storm drains.
- 2
Containment and Safety Setup
Absorbent barriers and traffic cones are placed to protect staff and customers while we isolate the affected drains in the kitchen or service area.
- 3
Pumping and Removal
The interceptor is pumped using truck-mounted equipment sized for local commercial units, with all material taken to approved Larimer County disposal facilities.
- 4
Final Cleaning and Documentation
Drains and surfaces are sanitized and a written report is provided for the restaurant’s health-department records.
Pricing
Pricing depends on interceptor size, volume of material, and access conditions; we provide an upfront quote after the initial assessment.