Blog · October 14, 2026 · Washington
Grant County Flood Zone Map, Washington
Look up any Grant County address on FEMA's flood map, read the zone, and match it to the parcel record for land around George.
Main page: Grant County, WA GIS & Parcel Viewer (official map link, Grant County facts and neighboring maps).
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Is that lot in Electric City in a flood zone? The Grant County flood zone map answer comes from FEMA, and it is free to look up. You can check it yourself for any Electric City address in a few minutes.
Below are the FEMA links, a plain reading of the zone labels, notes on where water shapes land around Electric City, and short answers to common questions.
How to use the Grant County flood zone map
FEMA's official flood maps for Grant County are free at the FEMA Flood Map Service Center. Download the FIRM panel FEMA lists as effective for that part of Grant County. For an interactive view of the county, try FEMA's National Flood Hazard Layer viewer; zoom to the piece of ground near Ephrata and click. Switch to the Washington Current Parcels layer in ArcGIS Map Viewer and track down the same piece of ground near Ephrata. The Grant County record gives the parcel identifier and legal description that an insurer or lender near Mattawa may ask for.
Opening the Grant County parcel viewer
There's no separate Grant County parcel site to hunt for; the Washington Current Parcels layer in ArcGIS Map Viewer carries the county's parcels along with the rest of Washington. Most people track down their Grant County tract fastest by searching an address in George, then clicking the outline. Our Grant County, WA page keeps the official link and the maps next door to George in one place.
Reading the zones on a Grant County flood map
On the FIRM covering Grant County, zones that start with A or V are Special Flood Hazard Areas, defined by a 1-percent annual chance of being flooded. Where a Grant County tract displays Zone AE, there's a base flood elevation to compare a building against; in Zone A there is not one. Shaded Zone X around Mattawa falls between the base flood and the 500-year flood. Clear, unshaded X near Mattawa is outside the 500-year floodplain.
Unmapped creeks in Grant County
Small streams and ditches near Mattawa may not be studied in detail, so treat an unmapped channel as a reason to ask questions, not proof the ground stays dry.
A short buyer checklist for Ephrata
For a house near Grand Coulee, ask the seller for any elevation certificate on file and the current flood insurance declarations page. An agent working in Grant County can quote flood coverage once you know the zone for the lot near Grand Coulee.
Floodways and restudies near Quincy
When FEMA restudies streams in the county, preliminary maps are posted before they take effect, and a lot near Banks Lake South can move in or out of a zone. A floodway on a county panel marks the part of the floodplain that carries the main flow, and it is treated more strictly than the rest of the zone near Banks Lake South.
When the map affects a deal
Here's why the zone matters at a closing in Mattawa. If a house near Ephrata sits in a Special Flood Hazard Area and is financed by a regulated or federally insured lender, federal rules call for flood insurance, provided the community near Mattawa takes part in the National Flood Insurance Program. Outside the A zones around Ephrata, coverage is optional, though a lender in Washington can still ask for it. If a building near Ephrata sits above the flood line, the owner can ask FEMA for a Letter of Map Amendment (LOMA), supported by elevation data from a professional surveyor. New construction in a Grant County Special Flood Hazard Area has to meet local floodplain rules; the Grant County floodplain administrator can say what applies.
Quick answers for Grant County
Do I need a permit to build in the floodplain near Electric City?
Building in a Special Flood Hazard Area near Electric City usually needs a floodplain permit and may require elevating the structure, so check with the county floodplain administrator.
How do I know if a property in Grant County is in a flood zone?
Look it up at FEMA's Flood Map Service Center, then match the parcel lines in the Washington Current Parcels layer in ArcGIS Map Viewer; for land near Moses Lake, a zone starting with A or V is high risk.
How do I challenge a flood zone for a lot in Electric City?
FEMA reviews requests such as a LOMA for Grant County properties; start with an elevation certificate.
What does BFE mean on the flood map for Electric City?
Near Moses Lake, the BFE is the height floodwater is expected to reach in the 1-percent-annual-chance flood, and a surveyor compares the building near Electric City to it.
Does the Grant County parcel map display flood zones?
Check the layer list in the Washington Current Parcels layer in ArcGIS Map Viewer; if Grant County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Open the official Grant County, WA parcel map Grant County in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.