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Water Damage Categories and Drying Classes Explained

Plain-language guidance to contamination categories and the amount of water involved in a restoration project.

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Practical Hartford Guide

Clear steps for property owners, landlords and managers.

Water Categories Describe Contamination

Category language helps communicate the potential level of contamination. Conditions can change over time and as water contacts building materials.

Category 1

Water begins from a sanitary source, such as some supply-line failures. It can deteriorate if it remains in the building or contacts contaminants.

Category 2

Water contains meaningful contamination and may cause illness if ingested or contacted. Some appliance discharges may fall into this range depending on contents and conditions.

Category 3

Grossly contaminated water, including sewage and many outside flood events. Porous-material removal and controlled cleaning are commonly required.

Drying Classes Describe the Amount and Distribution

Classes are used to describe how much material and area are wet and how difficult evaporation may be. They help inform equipment and monitoring, not insurance coverage.

Conditions control the scope: The source name alone does not answer every question. Time, temperature, materials and what the water contacted all matter.
Helpful guidance: For safety and cleanup guidance, consult the U.S. Environmental Protection Agency and Centers for Disease Control and Prevention. For coverage questions, contact your insurer or the Connecticut Insurance Department. Coverage depends on the policy and cause of loss.
How We Apply This Guide

How Water Category Changes the Cleanup Plan

We do not treat every water loss the same. The source and what the water contacted influence protective equipment, containment, cleaning, material removal and disposal. The drying class describes the amount and distribution of moisture, which helps determine equipment and monitoring needs.

When to Request Professional Help

Contact us when water has affected walls, flooring, insulation, cabinets, multiple rooms, a lower level, sewage, electrical areas or materials you cannot inspect. A small surface spill may be manageable, but hidden moisture and contaminated water require a more complete evaluation.

When you submit a request, include photographs when available and describe what is still wet, whether the source is active and what steps have already been taken. We will review the details and explain the next step.

Common Questions

Water Damage Categories and Drying Classes Explained FAQ

Not automatically. Water entering from outdoors can contact roofing, soil, animal waste, chemicals and other contaminants.

Yes. Time, temperature and contact with materials can change conditions.

It generally refers to difficult-to-dry materials or assemblies with low-permeance surfaces, such as dense wood, plaster or concrete.

No. Categories describe restoration conditions. Insurance coverage is determined by the policy and cause of loss.

How We Use This Information

Turning Guidance Into a Clear Restoration Plan

General advice is useful, but every water loss still needs to be applied to the actual source, materials and building. When you contact us, we use the information on this page to ask better questions, identify immediate hazards and determine what should happen first.

We will not ask you to diagnose hidden moisture or decide what materials are contaminated. Tell us what you can see, when it started and what areas are affected. We will help organize the next step.

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When the Situation Is Bigger Than a Small Spill

Contact us when water has entered walls, ceilings, flooring, cabinets, basements or multiple rooms, or when sewage, electricity, mold, commercial operations or structural damage may be involved.

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Need Water Damage Help in Greater Hartford?

Send the property location, source of water, affected areas and timing, and we will review the situation and follow up with the right next step.

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