Case Studies and News Stories of Rats in Plumbing in the US
Rats Invading Plumbing Systems: U.S. Case Studies
Urban legends about rats emerging from toilets are real, backed by documented U.S. cases. Below are examples from homes, apartments, and sewer systems. Each shows how rats entered plumbing, how infestations were discovered, and how experts resolved them. Common patterns include heavy rain, drought, or aging infrastructure. All cases are drawn from verified news, pest control, or official sources.
Portsmouth, NH (Single-Family Home, 2013–2014)
Location/Date:
A single-family home in Portsmouth, New Hampshire. The issue unfolded over winter 2013–2014 (colonialpest.com).
Intrusion Method:
A Norway rat likely entered through a hole beneath the porch foundation. It moved into wall cavities and plumbing spaces, drawn by dog feces in the yard (colonialpest.com). The rat didn’t use sewer lines but damaged indoor plumbing by chewing through plastic pipes.
Discovery:
Homeowners first noticed water leaks in the basement. A plumber found chew marks on heating pipes and droppings nearby (colonialpest.com). More leaks appeared nightly, and ceiling panels revealed nests and more pipe damage—confirming an active rat problem.
Damage:
The rat repeatedly gnawed through pipes, flooding the basement and walls. Repairs and ceiling removals totaled about $10,000 in damage, earning it the nickname “the $10,000 rat” (colonialpest.com). Experts noted the risk extended to wiring and insulation as well.
Response:
Two pest firms tried trapping and baiting, but the rat avoided them. Sealed inside during repairs, it survived weeks before a specialist placed bait directly in wall routes (colonialpest.com). Nine days later, the noises and leaks stopped—the rat had died. The homeowners then sealed all entry points and cleaned up attractants.
Notable:
Even one rat can cause major damage once inside a home’s structure. The case highlights how small entry holes and outdoor waste can invite costly infestations. Unlike “toilet rats,” this one chewed its way in and nested around plumbing lines (colonialpest.com).
Portland, OR (Residential Sewer/Toilet Incident, 2014)
Location/Date:
A private home in Portland, Oregon; incident occurred March 2014 (columbian.com).
Intrusion Method:
A sewer rat swam through flooded pipes into a toilet. Heavy rain likely overflowed Portland’s aging sewers, forcing rats into lateral lines connected to homes (columbian.com).
Discovery:
At 2 A.M., homeowner Daniel Powers heard scratching in his bathroom. Lifting the lid, he found a live rat staring back with “beady eyes” (columbian.com). He slammed the lid shut before it escaped.
Damage:
The rat caused no injuries or property damage but left a lasting fright. Powers weighted the toilet lid with books overnight. By morning, the rat had vanished—likely retreating or drowning (columbian.com).
Response:
A pest control expert confirmed the likely cause: storm-flooded sewers pushing rats upward. Local officials said they receive 20–30 reports of rats surfacing in toilets each year (expressnews.com). Standard advice is simple—keep the lid closed, flush, or call professionals if the rat remains (patch.com).
Notable:
This case shows how heavy rain can drive sewer rats into homes through toilets, not kitchen pipes. While rare, it’s a recurring issue in cities with old sewer systems (columbian.com).
Unnamed Hotel (United States, 2015)
Location/Date:
A U.S. hotel (location undisclosed) experienced a shocking rat incident in October 2015 (fox10phoenix.com).
Intrusion Method:
A large sewer rat swam through the hotel’s plumbing and became trapped upside down inside a toilet’s S-bend. Its legs and tail were visible from below. The animal had likely tried to squeeze through a narrow section and got stuck.
Discovery:
A hotel guest heard scratching in the bathroom and called staff. When maintenance checked, they found the rat wedged in the toilet trap. A viral photo showed the overturned toilet with the rat’s hindquarters protruding (fox10phoenix.com).
Damage/Disruption:
The toilet had to be removed and the plumbing disassembled to extract the rat. The incident caused no injuries but serious disgust. The hotel faced embarrassment after the story spread online.
Response:
Hotel staff removed the rat and likely hired pest professionals for cleanup. The guest was relocated, and management probably inspected and upgraded the sewer lines afterward (fox10phoenix.com).
Notable:
This case shows that even modern hotels can suffer sewer rat intrusions. The viral image became a warning to travelers about unseen plumbing entry points. It also suggests the rat was unusually large—too big to pass the toilet trap—an unsettling sign of how adaptable urban rats have become.
Unnamed Hotel (United States, 2015)
Location/Date:
A U.S. hotel (location undisclosed) experienced a shocking rat incident in October 2015 (fox10phoenix.com).
Intrusion Method:
A large sewer rat swam through the hotel’s plumbing and became trapped upside down inside a toilet’s S-bend. Its legs and tail were visible from below. The animal had likely tried to squeeze through a narrow section and got stuck.
Discovery:
A hotel guest heard scratching in the bathroom and called staff. When maintenance checked, they found the rat wedged in the toilet trap. A viral photo showed the overturned toilet with the rat’s hindquarters protruding (fox10phoenix.com).
Damage/Disruption:
The toilet had to be removed and the plumbing disassembled to extract the rat. The incident caused no injuries but serious disgust. The hotel faced embarrassment after the story spread online.
Response:
Hotel staff removed the rat and likely hired pest professionals for cleanup. The guest was relocated, and management probably inspected and upgraded the sewer lines afterward (fox10phoenix.com).
Notable:
This case shows that even modern hotels can suffer sewer rat intrusions. The viral image became a warning to travelers about unseen plumbing entry points. It also suggests the rat was unusually large—too big to pass the toilet trap—an unsettling sign of how adaptable urban rats have become.
Municipal Sewer System Responses
Seattle, WA (City Sewer “Rat Baiting” Program, Ongoing)
Seattle faces recurring “sewer rat” issues, with about 50 reports of rats in toilets each year (publichealthinsider.com). That’s small compared to 2.5 million toilets citywide, but still dozens of startled residents. Most complaints occur during wet weather, when rats flee flooded burrows.
Sewer Baiting Program:
Seattle Public Utilities and Public Health run a joint baiting program (kingcounty.gov). When a report comes in, they inspect nearby sewer lines, repair breaks, and deploy rodenticides. They treat the sewers like a managed pest zone, focusing on areas with repeat incidents. Crews even perform dye tests to find leaks linking burrows to homes (seattlepi.com).
Public Guidance:
Seattle warns that heavy rain can push rats into old side-sewer pipes (patch.com). Officials urge residents to keep lids closed and avoid flushing food or grease (publichealthinsider.com). The city even published a comic guide, “What to Do If You Have a Rat in Your Toilet,” underscoring that it’s an occasional but real problem.
Case Example:
One homeowner found a large rat clinging under the toilet rim. When a health worker tried plunging it, the rat leapt out and ran around the bathroom (seattleweekly.com). Incidents like this prompted Seattle to expand its formal response, focusing now on prevention and resident support rather than in-home removals.
Notable:
Seattle’s system-wide approach treats rats in plumbing as a sewer infrastructure issue, not just a household one. It’s proven effective, cutting repeat complaints (columbian.com). Similar programs exist in Portland and New York, showing cities are now tackling rats “below the streets” as part of public health strategy.
Sources:
- Curbed NY – first-person account of Brooklyn apartment rat infestation via plumbing curbed.com
- Colonial Pest Control – case study “The $10,000 Rat” in Portsmouth, NH (extensive plumbing damage by a rat) colonialpest.com
- The Columbian (AP News) – report on Portland man finds rat in toilet (sewer backflow after heavy rain) columbian.com
- Patch Somerville – article on Somerville, MA residents finding rats in toilets (via city sewer) patch.com
- Fox10 Phoenix – news story on rat lodged in hotel toilet pipes (guest encounter, 2015) fox10phoenix.com
- King County Public Health – “Keep rats out of your toilet” advisory and Seattle Sewer Baiting Program details kingcounty.gov
- Public Health Insider (Seattle) – blog with stats on Seattle’s 50 rat-in-toilet complaints/year and prevention tipspublichealthinsider.com
- Seattle Weekly – “The Rat Patrol” article (2006) with an anecdote of a public health worker responding to a toilet rat incident seattleweekly.com
- “News of the Weird” syndicated column – note on Portland official getting 20–30 toilet rat calls yearly expressnews.com
- Scottish Plumber (Chicago) – discussion of rats using broken sewers as highways into homes scottishplumber.com (context on infrastructure).
