You need contractors pollution liability with mold and bacteria covered, because mold is the whole job and your general liability policy is written to exclude it. Most mold remediation companies also add professional liability for their inspection and clearance work, plus general liability, workers comp, auto, and equipment coverage. Who this is for: owners of mold inspection, testing, and remediation companies.
The short version
- Your general liability policy has a separate page that removes mold and bacteria claims. That page, not the pollution exclusion, is what decides mold.
- Contractors pollution liability is the policy that pays mold claims. Check the mold cap closely, since some policies pay far less for mold than for other pollution claims.
- If you test air quality or sign off that a home is clear, add professional liability. Being wrong about a clearance reading is a mistake in your professional judgment, not a pollution release.
- Commercial customers and property managers often require $1,000,000 to $2,000,000 of pollution coverage with no low mold cap.
- You also need general liability, workers comp for your crew, commercial auto, and coverage for your air scrubbers and negative air machines.
Why doesn't general liability cover mold remediation?
Because mold is exactly what a general liability policy is built to exclude. Most policies carry a separate fungi or bacteria exclusion page. It removes payment for mold and bacteria claims outright, whether the mold came from your work or someone else's. Since mold is your entire business, this exclusion matters more to you than to almost any other trade.
| Where it is | What it means in plain English |
|---|---|
| Fungi or bacteria exclusion (CG 21 67), a separate page | No payment for mold or bacteria claims. This is the page that decides mold, not the pollution exclusion. |
| Professional services exclusion, standard on most general liability policies | No payment for a mistake in judgment, like a clearance test that missed hidden mold. That is a professional liability claim, not a general liability one. |
What does contractors pollution liability cover for a mold company?
Contractors pollution liability is coverage for fumes, dust, spills, or mold caused by your work. For a mold remediation company it usually pays for:
- Mold and bacteria claims, including mold that regrows after you leave a job you called finished.
- Bodily injury to a tenant, homeowner, or worker who has a health reaction tied to mold exposure.
- Property damage, including the tear-out and rebuild after a remediation job goes wrong.
- Legal defense. On most pollution policies, defense comes out of the limit rather than on top of it the way general liability defense does. Ask which way your quote is written.
Watch the mold sublimit closely. A sublimit is a lower cap inside the main limit. A policy can advertise a $1,000,000 limit and still cap mold claims at $100,000 or $250,000 unless you ask for the mold cap raised to match the full limit.
Do I need professional liability if I already have pollution coverage?
Usually yes, if you test, inspect, or sign clearance paperwork. A remediation crew that scrubs mold off drywall is doing pollution work. An inspector who takes air samples, reads them, and tells a buyer or landlord the space has "passed" is doing professional work. If that clearance turns out wrong and someone gets sick or a sale falls through, the claim is about a mistake in professional judgment, not a pollution release, and general liability and even contractors pollution liability can both deny it. Professional liability is the policy built for that gap.
| Situation | Which policy usually pays |
|---|---|
| Your crew's remediation work leaves mold behind or spreads it | Contractors pollution liability |
| Your clearance test or inspection report was wrong | Professional liability |
| A worker is hurt handling equipment on the job | Workers comp |
| A visitor slips on a wet floor at the job site | General liability |
See contractors pollution liability versus professional liability for remediation for more on how the two work together.
Do commercial contracts and property managers require pollution coverage?
More every year, especially from property managers, schools, and hospitals. Typical asks:
- $1,000,000 to $2,000,000 of contractors pollution liability, sometimes $5,000,000 on larger commercial or institutional work.
- No mold sublimit below the main limit, or one raised to at least $250,000.
- Your customer added to your policy, so they can use it if they get sued because of your work.
- A policy that covers work performed while it is active, even if the claim shows up later. Most trade pollution policies work that way.
If a contract asks for more than you carry, see how to get a $5,000,000 pollution requirement met.
What other insurance does a mold remediation company need?
| Policy | What it does for you |
|---|---|
| General liability | Covers everyday claims like a customer slipping at the job, separate from mold and professional mistakes. |
| Workers comp | Pays medical bills and lost wages when a technician is hurt, and covers respiratory claims tied to mold exposure on the job. |
| Commercial auto | Covers your vans and trucks and the equipment mounted in them. |
| Equipment coverage | Covers air scrubbers, negative air machines, and moisture meters at a job, in transit, or stolen from a truck. |
How much does insurance cost for a mold remediation company?
These numbers are illustrative. Your revenue, state, whether you also inspect, and your claims history set the real price.
| Business | Illustrative annual pollution cost, $1,000,000 limit |
|---|---|
| Owner plus 1 to 4 techs, remediation only | $2,500 to $4,500 |
| 5 to 15 techs, remediation and testing | $4,000 to $7,000 |
| 15 or more techs, remediation, testing, and clearance sign-off | $6,000 to $11,000 |
See how to find cheaper pollution coverage.
What this looks like in real life
Illustrative example. It is typical of what we see and is not a promise of how any specific situation would be handled.
The setup: A mold remediation company in California with six technicians clears a crawl space and signs a report calling the home clear. They carry general liability and workers comp, but no pollution coverage and no professional liability.
What went wrong: Two months later the homeowner finds mold growing behind a bathroom wall the crew never opened. The buyer who relied on the clearance report backs out of a home sale and sues both the homeowner and the remediation company.
What it cost: The claim runs to about $71,000 between the regrowth cleanup and the lost sale. The general liability insurer denies the mold claim under the fungi and bacteria exclusion and denies the clearance report claim as a professional services matter. With no pollution or professional liability policy in place, the owner pays roughly $71,000 himself.
The fix: For mold companies, the remediation work and the clearance sign-off are two separate claims that fall outside general liability. Price both pollution coverage and professional liability before a bad reading finds you.
Frequently asked questions
Q: What insurance does a mold remediation company need?
Contractors pollution liability with mold and bacteria covered, because that is the claim general liability denies. Most mold companies also add professional liability if they test or clear jobs, plus general liability, workers comp, auto, and equipment coverage.
Q: Why does my general liability policy exclude mold if I only do water drying?
Because the fungi and bacteria exclusion applies to any mold claim, not just remediation work. A slow leak you dry can still grow mold behind a wall later, and that claim is excluded no matter how the mold started.
Q: What is a lower mold cap and why does it matter?
Some pollution policies pay a smaller amount for mold claims than the main limit on the rest of the policy. A policy can advertise $1,000,000 of coverage and still pay only $100,000 for mold unless you ask for that cap raised or removed.
Q: Do I need professional liability if my crew never tests or inspects?
Probably not, if you only remediate and never sign off that a space is clear. Once you take air samples, read them, or issue a clearance letter, you are giving a professional opinion, and professional liability is the policy that responds if that opinion turns out wrong.
Q: How much pollution coverage do commercial customers usually require?
Most commercial contracts and property managers ask for $1,000,000 to $2,000,000, and some hospital or school work asks for $5,000,000. Many also want the mold sublimit raised to match the main limit instead of left at a lower cap.
Q: Does workers comp cover a technician who gets sick from mold exposure?
Usually yes, if the illness is tied to the job and meets your state's rules for an occupational disease. Workers comp pays medical bills and lost wages for the employee, separate from any claim a customer brings against your business.
Q: Can I bundle pollution coverage with my general liability policy?
Sometimes. Some insurers sell a package to remediation and restoration trades that includes both, while others require a stand-alone pollution policy from a specialty insurance company. Ask at your next renewal which fits your business.
How Morrow helps
Morrow is a licensed independent commercial insurance brokerage that works with contractors and trades every day. Pricing pollution coverage with mold covered, alongside professional liability for testing and clearance work, is a routine part of what we do for mold remediation companies.
- Free contract review. Send us the contract or bid documents and we mark up the insurance section in plain English, whether or not you buy anything from us.
- Free, instant certificates. Clients issue their own certificates of insurance online in about a minute, any hour, any day, at no charge.
- Markets you cannot reach online. One application, shopped across many insurance companies for general liability, workers comp, auto, umbrella, and pollution coverage.
One more thing. This article is general information and is not legal advice or a statement of coverage. Your contract and your policy wording control in every case. Requirements vary by customer, by state, and by insurance company, so have a licensed advisor review your own contract and your own policy before relying on any of it.
Last updated: Reviewed by the Morrow commercial lines team. Last updated September 2026.