Is Mold Making Us Sick? What a Test Can and Can't Tell You
Start with the honest limit: a mold test cannot tell you whether mold is making someone sick. That is a medical question, and your doctor is the one to answer it. What a test does is replace a guess with a measurement, which spore types are in your air and at what concentration against the outdoor baseline. This guide covers what testing answers, what it doesn't, and which public agencies in Pennsylvania will and will not help. Bob personally collects every sample, PRO-LAB certified, results in 2-3 days, from $290. Owner-operated, 4.9★ across 169 Google reviews, and All Seasons never performs remediation, so no one here profits from finding a problem.
Inspections typically scheduled within the week. Bob returns every call within 24 hours.
The Honest Limit
Can a mold test tell you if mold is making you sick?
No. A mold test measures the air in your home: which spore types are present, at what concentration, and how that compares to the outdoor baseline on the same day. Connecting a measurement to a person's symptoms is a medical judgment, and only a physician can make it. What testing gives your doctor is a documented number instead of a guess about the house.
✓ What a mold test answers
- Which mold species are airborne inside your home
- Whether indoor spore counts are elevated against the outdoor baseline
- Which room or level carries the highest concentration
- Whether there is active growth behind a wall you cannot see
- Whether a past remediation actually cleared
- A lab-certified record your doctor, insurer, or attorney can use
○ What a mold test does not answer
- Whether mold is the cause of anyone's symptoms
- Whether a person has been medically affected by exposure
- What treatment anyone needs
- What a "safe" spore count is for a specific person, because sensitivity differs from person to person
Those four belong to your doctor. Bob inspects buildings, not people, and will say so on the phone. Anyone in this trade who offers to diagnose a health condition from an air sample is selling you something.
Public Agencies
Who in Pennsylvania will come test your home for mold?
No public agency will. Indoor mold is not regulated at the state level, and the Pennsylvania Department of Environmental Protection states the limit of its own authority directly: "The PA DEP has no authority over indoor air quality. It cannot address black mold or other issues in homes or apartments." County health departments across the Philadelphia suburbs run habitability and nuisance complaint programs, which are aimed at rental housing, and none of them perform air testing for a homeowner.
That is worth knowing before you spend a week on hold. Here is what each county in the All Seasons service area actually does, with links so you can confirm it yourself.
| County | What they do about residential mold |
|---|---|
| Pennsylvania (state) | No authority over indoor air quality and no mold regulation. DEP refers residents to the EPA. PA DEP complaint page |
| Montgomery County | Runs an Office of Public Health but publishes no residential mold or indoor air quality program. General public health contact only. Office of Public Health |
| Bucks County | Housing Hygiene & Sanitation covers rental units only, by written complaint (form SA-2). Owner-occupied homes fall outside it. The county also hosts the EPA's mold and moisture guide. Housing Hygiene & Sanitation |
| Chester County | Accepts voluntary health complaints through its Housing and Vector Concerns program and points renters to local building code enforcement. No homeowner air testing. Housing & Vector Concerns |
| Delaware County | Its Division of Environmental Health coordinates responses to public health complaints. Complaint intake, not air sampling. Division of Environmental Health |
| Philadelphia | No city mold regulation. Licenses & Inspections responds through 311 to the conditions that cause mold, such as leaks and structural defects, rather than to mold itself. Lead & Healthy Homes Program |
Agency programs change. Every row above links to the county's own page so you can check the current position before you rely on it.
Read The Source
What do the health authorities actually say about mold?
Read them directly rather than taking any inspector's word for it, Bob's included. Pennsylvania's own DEP refers residents to the EPA instead of publishing state guidance, and the EPA and CDC agree on the points that matter most to a homeowner: mold needs moisture to grow, individual sensitivity differs, and fixing the water problem matters more than identifying the species.
EPA — Mold
The agency PA DEP refers residents to. Covers health effects, cleanup, and when to hire a professional.
epa.gov/mold →A Brief Guide to Mold, Moisture & Your Home
The EPA handbook Bucks County distributes to its own residents. The most useful single document on this topic.
Read the guide →CDC — Mold and Your Health
What is established about mold and health, and what is not. Written for the public, not for contractors.
cdc.gov →EPA — Indoor Air Quality
Broader than mold. Useful when symptoms persist and mold turns out not to be the story.
epa.gov →What to Expect
What does a mold air test actually measure?
An Air-O-Cell spore trap pulls a measured volume of air across a sticky slide, which a laboratory then reads under a microscope to count and identify spores. The number on its own means little. The comparison is what counts: indoor concentration against an outdoor sample taken the same day, at the same property. Bob performs all inspections to InterNACHI Standards of Practice.
The Indoor Sample
Taken in the rooms where people spend time or where symptoms are worst, plus any area with a musty smell or a moisture history.
The Outdoor Baseline
Every home has spores in the air. The outdoor control is what makes an indoor count meaningful, and a test without one tells you almost nothing.
The Lab Result
PRO-LAB certified analysis returns in 2-3 business days with species and concentration named, in a document your doctor or insurer can read.
The Moisture Read
Bob also traces where water is getting in, because a spore count without a moisture source leaves you with a number and no fix.
More detail on how the sampling works and how to read a report: how air testing reads mold and a real sample report.
First Steps
What should you do first when someone at home keeps getting sick?
See a doctor first, before you call any inspector. A physician can rule in or out the causes that have nothing to do with your house, and can tell you whether an environmental question is worth pursuing at all. If it is, the order below keeps you from spending money in the wrong sequence.
1. Start with the doctor, not the house
Symptoms have many causes. A physician is the only one who can connect a person's health to an exposure, and a good one will tell you whether testing the home is worth doing.
2. Write down the pattern
Note which rooms, which times of day, and whether symptoms ease when the person is away from the house for a few days. That pattern is the single most useful thing you can bring to both your doctor and your inspector.
3. Look for the water
Mold needs moisture. A past flood, a slow roof leak, a damp basement, condensation on windows, or a bathroom with no working fan all point at where to sample.
4. Read the EPA guide before you buy anything
Ten minutes with the EPA's brief guide will save you from half the products and services marketed at worried homeowners.
5. Test when you need a measurement, not a reassurance
If there is a musty smell with no visible source, a moisture history, or a symptom pattern tied to the building, a test turns the question into a number. If you can see the mold and know what caused it, clean it and fix the water instead. Bob will tell you that for free on the phone.
6. Keep the remediation decision separate
Whoever tests your air should not be the company that profits from remediating it. All Seasons does not perform remediation, which is why the recommendation you get carries no incentive.
Why Choose Bob
Why do Philadelphia-area homeowners choose All Seasons for mold testing?
You Always Get Bob
Bob personally collects every sample, start to finish. No corporate dispatch, no rotating technicians. You know exactly who is testing your home.
No Conflict of Interest
All Seasons tests and reports, and never performs remediation. There is no incentive to find a problem that is not there, and none to overstate one that is.
Results in 2-3 Days
PRO-LAB certified lab analysis returned fast, with a written interpretation Bob walks you through in plain English. No jargon, no scare tactics.
Buildings, Not Diagnoses
Bob reports what is in your air and where the water is coming from. He leaves the health questions to your doctor, and says so plainly.
Service Area
Where does All Seasons test for mold and air quality?
Bob covers the Pennsylvania suburbs and Philadelphia from a base in Wyncote, which puts most of Montgomery County within a short drive. Homes in Abington, Elkins Park, Jenkintown and Glenside get same-week scheduling most of the year. In Bucks County the moisture calls cluster around Doylestown and Warminster, in Chester County around West Chester and Malvern, and in Delaware County around Media, Springfield and Havertown, where stone foundations and finished basements do most of the damage.
Full county coverage: Montgomery County, Bucks County, Chester County, Delaware County and Philadelphia.
Go Deeper
Related mold and air quality guides
If you have decided the house is worth looking at, these go deeper on where mold hides, what the lab report says, and whether a test is worth the money in your situation.
Do You Need a Mold Test?
The decision guide, with a free printable checklist. When testing is worth it and when it is not.
Read More →Signs You Need Mold Testing
Every warning sign in the house and what each one actually means.
Read More →How Air Testing Reads Mold
How spore-trap sampling works and how to read the numbers on the report.
Read More →Home Air Quality Testing
What an indoor air quality test covers beyond mold alone.
Read More →What Basement Mold Looks Like
A visual guide to spotting basement growth before it spreads.
Read More →Apartment Mold: What to Know
Tenant and landlord responsibilities, and the signs renters miss.
Read More →Talk It Through
Ask Bob before you spend anything
Tell him what you are seeing, smelling, and where. He will tell you honestly whether a test would answer your question, or whether you would be better off spending the money on the leak. No pressure, no upsell.