Ephrata, Washington Flood Zones
Last updated: March 2026
Ephrata faces flash flooding from Rocky Coulee in Grant County. Intense thunderstorms produce rapid runoff through the coulee system that threatens the Columbia Basin community.
Grant County has recorded 17 NFIP flood insurance claims since 1978, totaling $81K in payouts. Explore the full NFIP claims data by state and county to see how this area compares nationally.
FEMA Region
Region 10
NFIP Policies
250
Grant County
Avg. Premium
$876/yr
Grant County
FEMA Flood Risk Profile: Grant County
Based on FEMA's National Risk Index, which evaluates flood risk at the county level using historical loss data, exposure, and vulnerability.
Inland Flood Risk
Relatively ModerateEst. annual loss: $13.8M
Source: FEMA National Risk Index, county-level assessment. Individual property risk may vary.
Federal Flood Disaster History: Grant County
Grant County has been included in 2 federal flood-related disaster declarations.
These declarations affected communities across Grant County, including Ephrata.
Source: OpenFEMA Disaster Declarations Summaries API. Data sourced February 2026.
NFIP Flood Insurance Claims: Grant County
Properties in Grant County have filed 17 NFIP flood insurance claims totaling $81K in payouts since 1978. The average claim payout is $5K.
Highest-Claim Years
1998
4 claims - $7K
2010
3 claims - $0
1979
2 claims - $2K
Claims by Flood Zone
Source: OpenFEMA NFIP Claims API. Data sourced March 2026. See national claims data.
What Your Flood Zone Means in Ephrata
Ephrata is vulnerable to flash flooding, where intense rainfall overwhelms drainage systems and sends water rushing through streets, arroyos, or low-lying areas within minutes. Unlike river flooding, flash floods arrive with little warning and can be deadly in urban areas and desert terrain. The most common FEMA flood zone designations in Ephrata are Zone AE, Zone X. FEMA's National Risk Index estimates the county's annual expected loss from inland flooding at over $13.8M.
Flash flood risk is difficult to predict by zone alone because intense localized rainfall can flood areas outside mapped SFHA boundaries. Under Risk Rating 2.0, FEMA accounts for distance to water, drainage characteristics, and rainfall intensity, not just the flood zone line on a map. If your property is in a Special Flood Hazard Area (SFHA) and you have a federally regulated or government-backed mortgage, federal law generally requires your lender to ensure you carry flood insurance.
Flash flood zone boundaries may shift when FEMA updates its stormwater drainage studies or when new development changes runoff patterns. Urbanization, in particular, increases impervious surface area and can expand flood risk into previously unaffected neighborhoods. Use our free lookup tool to check the current flood zone for any Ephrata address.
Flood Insurance Discount: Ephrata
Ephrata participates in FEMA's Community Rating System (CRS), a voluntary program that rewards communities for flood mitigation efforts beyond minimum NFIP requirements. Residents in the Special Flood Hazard Area may qualify for reduced flood insurance premiums.
CRS Class
Class 8
SFHA Premium Discount
10% off
CRS classes range from 1 (best) to 10 (no discount). Ephrata's Class 8 rating means NFIP policyholders in the SFHA can receive up to a 10% discount on their flood insurance premiums. Properties outside the SFHA may receive a 5% discount.
Source: FEMA Community Rating System, October 2025. Discounts apply to NFIP policies only.
Ephrata, WA Flood Zone FAQ
What flood zones are in Ephrata, WA?
The most common FEMA flood zones in Ephrata are Zone AE, Zone X. Properties in these high-risk zones (SFHA) may require flood insurance with a federally regulated or government-backed mortgage.
Is flood insurance required in Ephrata?
If your Ephrata property is in a Special Flood Hazard Area (SFHA) and you have a federally regulated or government-backed mortgage, federal law generally requires your lender to ensure you carry flood insurance. Properties in Zone X are not federally required to carry flood insurance, though coverage is still recommended since over 40% of all NFIP flood claims come from Zone X properties.
How do I check my flood zone in Ephrata?
Enter your Ephrata address in the search tool above for an instant flood zone determination. Results include your FEMA flood zone, SFHA status, base flood elevation (if available), and FIRM panel information, pulled directly from FEMA's National Flood Hazard Layer.
Does Ephrata offer flood insurance discounts?
Yes. Ephrata participates in FEMA's Community Rating System (CRS) with a Class 8 rating, qualifying residents in the Special Flood Hazard Area for up to a 10% discount on NFIP flood insurance premiums. Properties outside the SFHA may receive a 5% discount.
Has Ephrata experienced major flooding events?
Grant County, where Ephrata is located, has been part of 2 federal disaster declarations for flooding, hurricanes, or severe storms. The most recent was Severe Winter Storms, Flooding, Landslides, Mudslides in 2017. Federal disaster declarations are issued when flooding overwhelms local resources and triggers FEMA assistance programs.
How many flood insurance claims have been filed in Ephrata?
Grant County has recorded 17 NFIP flood insurance claims totaling $81K in payouts since 1978. The year with the most claims was 1998, with 4 claims and $7K in payouts. These figures cover all NFIP claims in the county, including Ephrata.
How many flood insurance policies are active in Ephrata?
Grant County currently has 250 active NFIP flood insurance policies with an average annual premium of $876. The most policies are in Zone AO (200 policies). These figures cover all active NFIP policies in the county.
Can my Ephrata property be removed from a high-risk flood zone?
Yes, if your property's natural ground elevation is above the Base Flood Elevation and FEMA inadvertently mapped it in a high-risk zone, you can apply for a Letter of Map Amendment (LOMA). A successful LOMA removes the property from the Special Flood Hazard Area, generally eliminating the federal mandatory flood insurance requirement. You will need an elevation certificate from a licensed surveyor. If a property was raised above the BFE with fill material, the process is a LOMR-F rather than a LOMA.
What is Base Flood Elevation in Ephrata?
Base Flood Elevation (BFE) is the predicted height of floodwaters during a 1% annual chance (100-year) flood, shown on FEMA maps as an elevation number in feet above sea level. In Ephrata's Zone AE areas, BFE lines appear on the FIRM as wavy contours labeled with elevation values. Properties with a lowest floor at or above the BFE typically qualify for significantly lower NFIP flood insurance premiums.
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Look Up Any Ephrata, WA Address
Enter a Ephrata, WA address to instantly check its FEMA flood zone designation, SFHA status, and insurance requirements.
Disclaimer: Flood risk data on this page is sourced from FEMA datasets including the National Risk Index, NFIP claims and policy records, disaster declarations, and the Community Rating System. These datasets were last extracted on March 2026 and may not reflect the most recent changes. This page is for informational purposes only and is not a certified flood zone determination. Always verify current flood zone status through FEMA or a licensed determination provider before making property, insurance, or lending decisions.