What Is a Natural Hazard Disclosure (NHD) Report in California?

In every California real estate transaction, buyers receive a series of disclosures about the property. One of the more important — and sometimes overlooked — documents is the Natural Hazard Disclosure (NHD) report.

This report outlines whether a property is located within specific environmental hazard zones identified by the state.

What the Report Covers

The NHD report typically identifies whether a property falls within areas such as:

• flood zones
• fire hazard severity zones
• earthquake fault zones
• seismic hazard zones
• areas of potential landslide risk

These designations are based on official mapping from state and local agencies.

Why It’s Required

California law requires sellers to disclose known hazards that could affect a property.

The NHD report standardizes that process by pulling together multiple hazard designations into one document, allowing buyers to review them clearly during the transaction.

What It Means for Buyers

Being located in a hazard zone doesn’t necessarily mean there is immediate risk. It simply indicates that the property is within an area where certain conditions exist.

For example:

• a fire hazard zone reflects wildfire exposure risk
• a flood zone relates to potential water-related events
• a seismic zone relates to geological movement

Buyers often use this information to better understand the property and, in some cases, to plan for insurance or future mitigation.

How It Fits Into the Process

The NHD report is typically delivered during the disclosure period, along with other documents related to the property.

It’s one of several pieces that help provide a complete picture of the home — not just its condition, but also its surrounding environment.

Natural hazard reports are a standard part of buying real estate in California. They don’t change the property itself, but they do add context — helping buyers understand how a home fits into the broader landscape around it.