CU 21 27 Fungi Or Bacteria Exclusion

An Insurance Services Office (ISO) standard form. It excludes umbrella liability for injury or damage that would not have occurred but for fungi or bacteria in or on a building, and for costs of testing, cleanup or remediation, except fungi or bacteria in goods meant for consumption.

2 other edition dates appear in one or two filings each, often carrier-specific versions: 04 92, 2104.

• Edition in use: in the past 12 months, 18 companies filed the 12 04 edition.
• CU 21 23 (Nuclear Energy Liability Exclusion Endorsement) is filed alongside it most often, in 55 of the same filings (82%).

Data from admitted P&C filings with state insurance departments, submitted Oct 2021 to Aug 2026, excluding withdrawn and rejected filings. One filing can cover several affiliated companies.

• Chubb Limited GroupFiles its own version: MS-1010830.2 Fungi or Bacteria Exclusion (1 state)
• Travelers GroupFiles its own version: XP 01 7409 24 Fungi Or Bacteria Exclusion (35 states)
• Berkshire Hathaway GroupUses CU 21 27 in 1 filing
• Fairfax Financial GroupUses CU 21 27 in 1 filing

• CU 21 23Nuclear Energy Liability Exclusion Endorsement55 filings
• CU 21 43Exclusion - Designated Products53 filings
• CU 21 00Exclusion - All Hazards in Connection with Designated Premises52 filings
• CU 21 07Contractual Liability Limitation52 filings
• CU 21 16Exclusion - Designated Ongoing Operations52 filings
• CU 21 03Exclusion - Designated Work51 filings
• CU 21 09Exclusion - Explosion, Collapse and Underground Property Damage Hazard (Specified Operations)51 filings
• CU 21 25Total Pollution Exclusion Endorsement51 filings
• CU 21 52Total Pollution Exclusion with a Building Heating, Cooling and Dehumidifying Equipment Exception and a Hostile Fire Exception51 filings
• CU 22 61Exclusion - Damage to Work Performed by Sub-Contractors on Your Behalf - Designated Sites or Operations51 filings