You reach $5,000,000 by stacking two policies, not by buying one bigger one. A remediation firm typically buys a primary contractors pollution liability policy at $1,000,000 or $2,000,000, then adds a pollution excess layer on top to reach the full $5,000,000. Who this is for: remediation and environmental contractors whose contract lists a pollution limit of $5,000,000 or higher.
The short version
- A single contractors pollution liability policy rarely goes all the way to $5,000,000 on its own, so most firms stack a primary policy with a second layer.
- The second layer is a pollution excess policy, which sits on top of the primary and pays after the primary limit is used up.
- A standard commercial umbrella will not do this job because most umbrellas exclude pollution entirely, so it cannot add pollution limit at any price.
- Plan on more lead time than a single policy takes, because the excess insurer has to review the primary policy's terms before it will quote on top of it.
- Illustrative cost to reach $5,000,000 in stacked pollution limits for a mid-size remediation firm is about $12,000 to $35,000 a year, on top of the primary policy.
Why can't I just buy one $5 million pollution policy?
Some insurers will write one policy at $5,000,000. Most will not, especially for remediation work, since insurers see it as higher risk than general contracting. Contractors pollution liability is coverage for fumes, dust, spills, or mold caused by your work. Each insurer sets its own maximum limit per account. For remediation firms that maximum is often $1,000,000 to $2,000,000. To get past it, you stack a second policy on top of the first.
How does stacking actually reach $5 million?
The bottom policy is the primary layer. It pays first, up to its own limit, and it handles and defends most claims. The layer above it is called excess. It pays only after the primary limit is used up. Layers are named by where they sit, not just by their own size.
| Layer | What it covers | Example limit |
|---|---|---|
| Primary contractors pollution liability | The first dollars of any pollution claim, plus most of the claim handling and defense work | $1,000,000 or $2,000,000 |
| First excess pollution layer | Claim amounts above the primary limit, up to this layer's own limit | $2,000,000 excess of $1,000,000 |
| Second excess pollution layer | Amounts above the first excess layer | $2,000,000 excess of $3,000,000 |
| Total available | Combined limit your certificate can show | $5,000,000 |
Your broker sends the same project details to the primary insurer and the excess insurer. The excess insurer prices its layer partly on how strong the primary policy's own wording is. A weak primary policy can make the top layer harder or more costly to place.
Can I just add pollution to my commercial umbrella instead?
No. This is the most common mistake on a $5,000,000 pollution requirement. A commercial umbrella, a second layer of coverage that sits above your other liability policies, is built to sit over general liability, auto, and employers liability. It almost always excludes pollution entirely, no matter how high its limit runs. Extra pollution limit has to come from a layer bought over your pollution policy itself, never from a general umbrella. If a broker offers an umbrella to fix a pollution limit shortfall, ask for written confirmation that it does not exclude pollution, because on most forms it does.
Does the top layer pay defense costs the same way?
Usually not the way general liability works. On most contractors pollution liability policies, including the layers stacked above them, legal defense costs come out of the limit rather than sitting on top of it. A long defense can use up part of the $5,000,000 before any settlement is paid. Ask your broker to show you, layer by layer, whether defense erodes the limit, and get it in writing.
What does my broker need to place a stacked $5 million program?
- The exact insurance section of the contract, including whether the limit can be per occurrence, aggregate, or both.
- A full description of the remediation work: contaminants handled, site types, and disposal methods.
- Your revenue, payroll, and how much work you sub out.
- Your claims history report, sometimes called loss runs.
- Whether the primary insurer is already chosen, since some excess insurers only follow specific primary forms.
How long does it take and what does it cost?
Plan on more time than a single policy takes. The top-layer insurer usually will not finalize a quote until it has reviewed the primary policy's actual wording, not just a summary. A simple two-layer program can still close in 5 to 15 business days. Three layers or unusual site work can take longer. The figures below are illustrative only. Your real price depends on your work, your states, your limits, and your claims history.
| Program | Illustrative annual cost |
|---|---|
| Primary $1,000,000 contractors pollution liability | $4,000 to $12,000 |
| $4,000,000 excess pollution layer above it, to reach $5,000,000 total | $8,000 to $23,000 |
| Combined stacked $5,000,000 program | $12,000 to $35,000 |
What should I check before I send the certificate?
Confirm the certificate shows the combined $5,000,000, not just the primary layer's limit. It should list every policy in the stack with its own limit and insurer. If the contract also wants your customer added so they can use your policy if sued because of your work, tell your broker early. That has to be arranged on every layer, not just the primary one. See what to do when requirements exceed your policy if your current limits fall short.
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: An environmental remediation contractor in New Jersey bids a soil and groundwater cleanup for a private developer. The contract requires $5,000,000 in pollution liability, and the contractor's current policy is a $1,000,000 primary contractors pollution liability policy.
What went wrong: He asks his broker to just raise the limit on his current policy, but his primary insurer's maximum for his class of work is $2,000,000. He also asks about adding an umbrella, since he already carries one for general liability.
What it cost: The umbrella quote confirms it excludes pollution entirely, so it cannot help. The broker instead places a $3,000,000 excess pollution layer on top of a $2,000,000 primary, reaching the required $5,000,000. The stacked program runs an illustrative $19,000 a year combined, and placement takes 11 business days because the excess insurer needed the primary policy's full wording before quoting.
The fix: A pollution limit shortfall is fixed with a pollution excess layer priced against the actual primary wording, never with an umbrella, and stacked programs take longer to place than a single policy does.
Frequently asked questions
Q: My contract requires $5 million in pollution coverage. How does a remediation firm get it?
By stacking a primary contractors pollution liability policy, commonly $1,000,000 or $2,000,000, with a pollution excess layer on top that fills the rest of the way to $5,000,000. A broker places both layers together because most single pollution policies do not go all the way to $5,000,000 for remediation work.
Q: Can I use my commercial umbrella to get to $5 million in pollution coverage?
No. Most commercial umbrellas exclude pollution completely, so raising the umbrella limit adds nothing to a pollution claim. Extra pollution limit has to come from a pollution excess layer bought over your pollution policy.
Q: Why won't one insurer just write the whole $5 million?
Most pollution insurers cap the limit they will offer any single account, and for remediation work that cap is often $1,000,000 to $2,000,000. Getting past it means adding a second insurer's excess layer rather than asking the first insurer to go higher.
Q: Does the excess layer pay before or after the primary policy?
After. The primary layer pays first, up to its own limit, and the excess layer pays only once the primary limit is fully used. That is why insurers describe it by where it sits, such as $3,000,000 excess of $2,000,000.
Q: Does legal defense reduce the $5 million?
Usually yes. On most contractors pollution liability policies and their excess layers, defense costs come out of the limit rather than being paid separately. Ask your broker to confirm, layer by layer, whether defense erodes the limit.
Q: How long does it take to place a stacked $5 million pollution program?
Often 5 to 15 business days, longer than a single policy, because the excess insurer usually reviews the primary policy's actual wording before it will quote its layer. Starting the application the day you see the requirement gives the most cushion.
Q: Will the certificate show the full $5 million?
It should, but only if it lists every layer with its own insurer and limit added together. Ask your broker to confirm the certificate reflects the combined program, not just the primary policy's limit.
How Morrow helps
Morrow is a licensed independent commercial insurance brokerage that works with contractors and trades every day. Placing a stacked primary and excess pollution program to reach a $5 million requirement is a routine request for our remediation clients.
- 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.