Why is there mold inside my toilet tank?

Thursday, June 21, 2018

We see this problem more often in homes that have been empty and closed up for a months waiting for a buyer, or bathrooms that are rarely used. Mold requires three things to start growing: warmth, moisture, and organic material. An empty house, with the air conditioner turned off or set at 80º F in the summer, will provide the heat. 

    Next, the chlorination in the water—that would ordinarily discourage mold growth—will dissipate because the toilet is not being flushed regularly, and dust floating into the tank will attach to the moist walls. So you have all three requirements for mold growth and, the longer the toilet sits unused, the uglier it gets.

    Also see our blog posts Are drop-in toilet bowl cleaner tablets safe? and Does a home inspector check toilets?


• • • • • • • • • • • • • • • • • • • • • • • • • • • • 

Here’s links to a collection of our other blog posts about “TOILETS”: 

Why is there sand in the bottom of my toilet tank?  

What are the pros and cons of a wall-mounted toilet?

What are the minimum clearances around a toilet? 

What is the little tank on top of the water heater for? 

What is that big thing in the toilet tank? 

What is the white plastic tank inside my toilet tank?

• Can I install a commercial (wall-mounted flushometer) toilet in my home? 

Does a home inspector check toilets?

• What is the code required minimum height above a toilet? 

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •

Here’s links to a collection of our other blog posts about MOLD, LEAD AND OTHER CONTAMINANTS:

Should I buy a house with mold?  

Why do new homes have more moisture and mold problems than older houses?

Can infrared thermal imaging find mold behind a wall? 

What is the right humidity level in a mobile home?

Who can clean up mold found during a home inspection in Florida?

How do I look for and find mold in my mobile home? 

Does bleach kill mold?

Why is there mold around the air conditioning vents? 

What can I do to prevent mold problems in my home?

Why is there a lead paint disclaimer in my real estate sales contract? 

How can I tell if there is asbestos in a house?

How can I prevent mold in my Florida winter home when I'm gone for the summer? 

Should I use bleach to clean up mold? 

What are those powdery white areas on my brick walls?

• What should I do if mold is found during a home inspection?

    Visit our PLUMBING and MOLD pages for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.

Water Heaters

Water Heater Age

Wells

Septic Tank Systems

Structure and Rooms

Plumbing Pipes

Termites, Wood Rot

& Pests

Sinkholes

Stairs

When It First

Became Code

"Should I Buy A..."

Park Model Homes

Site

Shingle Roofs

Safety

Stucco

Remodeling

Wind Mitigation Form

Roof and Attic

"Does A Home

Inspector...?"

Pool and Spa

"What Is The Difference Between..."

Radon

Brick

Plumbing

Concrete and

Concrete Block

Metal Roofs

Foundations

Modular Homes

Rain Gutters

Mold, Lead & Other Contaminants

Condominiums

Older and

Historic Houses

Crawl Spaces

Mobile/Manufactured Homes

Building Permits

Life Expectancy

Clay Soil

Insurance

Floors

Insulation

Toilets

Exterior Walls & Structures

Generators

Common Problems

HUD-Code for

Mobile Homes

Garages and Carports

Flat (Low Slope) Roofs

Electrical Panels

Sprinkler Systems

Electrical Receptacle Outlets

4-Point Inspections

Hurricane Resistance

Frequently Asked Questions (FAQ)

Home Inspection

Heating and Air Conditioning

Building Codes

Fireplaces and Chimneys

Inspector Licensing

& Standards

Energy Efficiency

Washers and Dryers

Electrical

Kitchens

Doors and Windows

(placeholder)

Cracks

Electrical Wiring

Click Below  

for Links

to Collections

of Blog Posts

by Subject

Plumbing Drains

and Traps

Appliances

Smoke & CO Alarms

Aging in Place

Top 5 results given instantly.

Click on magnifying glass

for all search results.

Bathrooms

Lighting

AFCI, CAFCI,

DFCI, & GFCI

Sinks

Air Conditioner & Furnace Age/Size

Attics

Electrical Switches

Siding

Search

This

Site

Water Intrusion

Electrical - Old

and Obsolete

(placeholder)

Foundation Certifications

Tiny Houses

How To Look At A House

McGarry and Madsen's home inspection blog for buyers of  

site-built, mobile/manfuactured and modular homes

About Us