Environmental Pollution Liability Insurance

Why this exists: the GL pollution exclusion

Nearly every general liability policy written since the 1980s contains a total or absolute pollution exclusion, removing coverage for bodily injury, property damage, or cleanup costs arising from the discharge, dispersal, or release of pollutants, with narrow carve-backs for things like fumes from a hostile fire. That exclusion was written broadly enough that ordinary business activities — a contractor disturbing contaminated soil, a tank leaking at a commercial property, mold growth after a water loss — can fall outside GL coverage entirely. Contractors pollution liability (CPL) and premises pollution liability (PLL) exist specifically to fill that gap.

CPL vs. PLL and what each covers

Contractors pollution liability is typically written on a project or practice basis for contractors whose work creates pollution exposure — excavation, demolition, environmental remediation, underground utility work — covering third-party claims and cleanup costs arising from pollution conditions caused by the contractor's operations. Premises pollution liability is typically written for property owners or tenants, covering pollution conditions on, at, or migrating from a scheduled location, including preexisting contamination discovered during ownership if structured at inception. Some placements combine both on a single form for contractors who also own or lease the sites they work from.

Both forms typically respond to cleanup costs, third-party bodily injury and property damage, and defense costs, and both are typically written on a claims-made basis with a defined pollution condition trigger rather than an occurrence trigger.

What is typically excluded

Known preexisting conditions not disclosed at underwriting, fines and penalties, gradual pollution the insured knew about and failed to address, and pollution from products after they leave the insured's care (typically a products liability question, not a CPL/PLL one) are typically excluded. Asbestos, lead, and mold are frequently sublimited or require separate endorsement rather than being covered at full policy limits by default.

What drives price and how to structure it

Pricing is typically driven by the type of work or occupancy, the pollutants involved, site history and any known contamination, project duration for CPL, and claims history. Contractors typically benefit from practice-level policies covering all projects over a policy period rather than one-off project placements, since continuous coverage avoids gaps between jobs. Structuring the trigger date and retroactive date correctly at renewal is typically the single most important technical point, since a gap in claims-made coverage can leave a pollution condition uncovered even if a policy is in force when the claim is made.