New London County CT Rat & Mouse Activity Report – 2026
Over the past several years, rodent activity has increased noticeably throughout southeastern Connecticut. In 2026, Floyd’s Pest & Wildlife Control continues seeing growing mouse and rat problems across both urban and rural sections of New London County.
What was once primarily a seasonal mouse issue has become a year-round rodent problem in many Connecticut communities.
Rodent infestations are no longer limited to older city buildings or commercial areas. Mice and rats are now being found regularly in suburban neighborhoods, shoreline communities, rural residential properties, garages, crawlspaces, barns, sheds, attics, and multifamily housing throughout New London County.
For broader regional service coverage, visit our New London County wildlife removal page.
Towns Seeing Increasing Rodent Activity
Floyd’s Pest & Wildlife Control continues seeing rodent pressure increase throughout multiple parts of the county, including:
- New London CT – older buildings, dense housing, restaurants, basements, and shoreline infrastructure create ideal rat and mouse habitat.
- Norwich CT – multifamily housing, older neighborhoods, crawlspaces, commercial corridors, and aging foundations support long-term rodent activity.
- Groton CT – shoreline development, military housing areas, restaurants, dumpsters, and dense residential neighborhoods contribute to increasing rodent pressure.
- Montville CT – wooded residential development, crawlspaces, garages, and mixed suburban/rural properties allow rodents to move easily between habitat and homes.
- Colchester CT – rural residential properties, barns, sheds, garages, and wooded areas continue to create ideal rodent nesting conditions.
Rodent pressure is also increasing in many smaller towns throughout the county as development expands into wooded areas and rodents adapt to residential environments.
Rats Are Becoming More Common Across Connecticut
One of the biggest changes seen throughout Connecticut is the increase in rat activity outside traditional urban environments.
Historically, most homeowners in smaller towns primarily dealt with mice. Today, rats are becoming increasingly common in suburban and even rural sections of Connecticut.
Floyd’s Pest & Wildlife Control is seeing more rat activity involving:
- Crawlspaces
- Detached garages
- Barns and sheds
- Dumpster areas
- Shoreline neighborhoods
- Commercial buildings
- Multifamily housing
- Storage areas
- Older foundations
- Exterior food sources
Warmer winters, expanding residential development, outdoor feeding sources, cluttered storage areas, and aging infrastructure all contribute to growing rodent populations.
Why Rodent Problems Are Increasing
Several factors are contributing to increasing rodent activity across New London County:
Older Structures
Older homes and buildings commonly develop:
- Foundation gaps
- Utility penetrations
- Crawlspace openings
- Basement entry points
- Garage gaps
- Roofline vulnerabilities
Mice can enter structures through extremely small openings, allowing infestations to spread quickly once activity begins.
Expanding Development
As residential development expands into wooded habitat, rodents and wildlife are pushed closer to homes and structures.
Food Sources
Bird feeders, garbage, pet food, compost piles, dumpsters, livestock feed, and cluttered storage areas all attract rodents.
Mild Winters
Warmer winter conditions in recent years have allowed rodents to remain active for longer periods throughout the year.
Rodent Contamination & Health Concerns
Rodent infestations create more than just nuisance problems.
Mice and rats constantly leave droppings and urine throughout attics, crawlspaces, basements, insulation, garages, wall voids, and storage spaces.
Large infestations can create:
- Strong odor problems
- Insulation contamination
- Air quality concerns
- Bacteria exposure
- Food contamination
- Structural damage
- Attraction for insects and other pests
Recent news coverage surrounding hantavirus concerns has increased public awareness about the health risks associated with rodent infestations.
Rodents can carry hantavirus, which is associated with exposure to contaminated rodent droppings, urine, and nesting materials — particularly in enclosed areas with poor ventilation.
While hantavirus cases remain relatively rare, rodent contamination inside homes, garages, sheds, crawlspaces, attics, and storage buildings should always be taken seriously.
This is one reason professional cleanup, sanitization, and proper protective procedures are important after large infestations.
Common Signs of Rodent Activity
Many homeowners do not realize how extensive a rodent infestation has become until contamination and odor problems are already widespread.
Common signs include:
- Mouse or rat droppings
- Scratching noises inside walls or ceilings
- Strong ammonia-like odor
- Chewed wiring or insulation
- Nesting material inside attics or storage areas
- Grease marks along walls
- Rodents seen during daytime hours
- Food contamination
- Damage around entry points
Why Exterior Baiting & Exclusion Matter
Long-term rodent control usually requires more than trapping alone.
Exterior baiting programs help reduce rodent populations around the structure before mice and rats move inside.
Exclusion work is also critical because rodents can continue re-entering through small structural gaps if entry points are not corrected.
Common exclusion areas include:
- Foundation gaps
- Crawlspace vents
- Garage corners
- Utility penetrations
- Roofline openings
- Basement gaps
- Siding gaps
Without exclusion work, many infestations eventually return.
Rodent Control Services in New London County CT
Floyd’s Pest & Wildlife Control provides:
- Mouse control
- Rat control
- Rodent inspections
- Exterior baiting programs
- Wildlife exclusion
- Entry-point sealing
- Attic cleanup
- Sanitization
- Odor control
- Insulation removal and replacement
- Crawlspace cleanup
We provide rodent control and wildlife services throughout New London County and surrounding southeastern Connecticut communities.
If you are hearing scratching noises, finding droppings, smelling strong odors, or seeing signs of rodent activity around the property, early intervention can help prevent a much larger infestation later.
