Association of American State Geologists

Representing the geological surveys of all 50 states and Puerto Rico, AASG provides trusted geoscience that supports public safety, resource stewardship, and informed decision-making.

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  • About AASG

Representing America’s State Geological Surveys Since 1908

Connecting geoscience to the issues that matter most

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Public Safety & Hazards

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Water & Natural Resources

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Critical Minerals & Energy

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Trusted Scientific Information

Learn About AASG

  • What We Do

Building a Better Understanding of Our Earth

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Geological Mapping & Data

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Water, Energy & Mineral Resources

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Geologic Hazards & Public Safety

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Geoscience Information & Decision Support

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  • Why It Matters

Science That Protects People, Resources, and the Future

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Protects Communities

Provides the geoscience needed to help communities address hazards, manage resources, and plan for the future.

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Drives Better Decisions

Provides the data and expertise needed for informed decisions about land, water, energy, and infrastructure..

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Informing Public Policy

Supports policymakers with objective, nonpartisan geoscience on issues affecting people, resources, and the environment.

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Geologic mapping supports decisions affecting communities, infrastructure, natural resources, and public safety across the nation.

  • The Cost-Benefit Case

Mapping is cheap. Not mapping is expensive.

Every dollar invested in geologic mapping returns approximately $7–10 in economic benefits. Geological maps provide long-term value through avoided losses, smarter development, and better resource decisions.

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7–10x Return on Investment

Geologic mapping generated an estimated $13.9–20.6 billion in benefits from a $1.99 billion investment.

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Long-Term Public Value

More than 7 million maps were downloaded or sold, supporting decisions across many sectors of the economy.

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Avoided Costs & Better Decisions

Geologic information reduces risks, improves planning, and helps avoid costly mistakes in development and resource management.

Download the Report

  • Case Studies

Success Stories: Real Impacts Across the Nation

From critical minerals and hazard mitigation to water resources and infrastructure planning, state geological surveys provide information that protects communities and strengthens economies.

View all state success stories