Stormwater Management

Our Stormwater Management Program protects water quality in 800+ miles of streams. We protect property from flooding through planning, maintenance, water quality assessment, and pollution prevention, reporting and enforcement. Storm drains lead to streams, not a wastewater treatment facility. Your actions impact local watershed health and the Chesapeake Bay.

ON THIS PAGE

Flooding, Storm Drainage, News
Plan, Build, Maintain, Inspect
Environment and Outreach
Maps and Publications
Additional Resources

If you are experiencing a life-threatening emergency, call 911.

For other flood emergencies or non-emergency problems, Report a Problem

Flooding, Storm Drainage, News

Flooding

Neighborhood flooding

Find information on how to protect your property from flooding, what is a floodplain, building around a floodplain, national flood insurance program, the community rating system, and dam safety.

Visit Flood Information

Storm Drainage System

Outfall Restoration at Stone Mill Court

Find out what the storm drainage system is, where to see the public system, who maintains the drainage system, who maintains the easement, where to call to report a problem or get more information, what you can do to help.

Visit Storm Drainage System

News and Video

News, Videos, EnviroPod
Plan, Build, Maintain, Inspect

Watershed Plans and Projects

What is a watershed?

Find Your Watershed

Watershed Management Plans

Improvement Projects and Restorations

Building - Bids, Solicitations, Construction

Watershed Improvement Plans, Projects and Restorations

On My Property

Outfall on Private Property

Storm Drainage Easements

Private Facility Maintenance

Floodplains

Connecting to the Public System

Public Design Standards

Go Green with Hands On Conservation

You Can Help Prevent Pollution

Invasive Species | Trapa bispinosa

Visit On My Property

Maintenance and Inspections

passage under trail

Stormwater Infrastructure Map

Maintenance

Inspections

Business Inspections| Polluted Runoff| Private Stormwater Facilities | Contractors

Facility Fact Sheets | FAQs

Visit Maintenance and Inspections
Environment and Outreach

Stream Quality

Assessing Water Quality

Stream Physical Assessments

Stream Quality Assessment

Stream Critters | Fish | Bacteria and Nutrients | Habitat

Visit Stream Quality Assessment Program

Pollution Prevention and Reporting

oil and water running toward storm drain

Municipal Separate Storm Sewer System (MS4) Permit

Polluted Runoff | Litter

Business Inspections

What's that Stuff in the Stream?

You Can Help Prevent Pollution

Visit You Can Help Prevent Pollution

Education and Outreach

Youth with dirty gardening gloves

What is a watershed?

Educational Programs K-12

Fishes of Fairfax County| A Field Guide to Fairfax County's Plants and Wildlife | Water's Journey

You Can Help Prevent Pollution

Visit Watershed Education and Outreach
Maps and Publications

Maps and Publications

MS4 Program Plan and Annual Report

Maps: View interactive maps for stormwater improvement projects, infrastructure, flood hazard areas, floodplains, and watersheds.

Reports and Publications:

Visit Stormwater Maps, Publications and Reports
Additional Resources

Additional Resources

Flood Awareness Week 2025
Flood Awareness Week 2025 begins with Resiliency Expo for Regional Elected Officials
Fairfax County, Va. – The inaugural Northern Virginia Resiliency Expo will take Fairfax County officials and additional Northern Virginia elected officials, agency directors and other regional leaders to sites in local jurisdictions to tour some flood resiliency projects.
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