Blog · October 14, 2026 · South Dakota
Reading the Day County Flood Zone Map for a parcel
Flood zones are set by FEMA, and checking one near Enemy Swim takes a few minutes.
Main page: Day County, SD GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before an offer near Webster, look at the Day County flood zone map: a mapped flood zone changes insurance, building rules and resale. What this Day County guide covers: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the District III regional GIS map.
Where the Day County flood zone map lives
The official source is FEMA's Flood Map Service Center: search an address around Andover, then open the map view for that panel. A tract near Butler without an address is still easy to locate: pan from the closest town then click the parcel area.
Opening the official parcel viewer
Lots and tracts near Pierpont appear on the District III regional GIS map, free to use and open without a login. If you're looking near Enemy Swim, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. Out toward Enemy Swim, the parcel card usually lists the owner of record, assessed acreage, a parcel ID and sometimes recent sales.
Reading A, AE and X
Closer to Webster, any A or V zone are Special Flood Hazard Areas, which FEMA defines as a 1% annual chance of flooding. For a tract near Webster, a shaded X area is moderate risk, between the 1% and 0.2% annual chance floods; plain X, or C on older maps, means minimal mapped risk.
A quick look at the area
Webster is the county seat, where most land records are kept. Smaller places on the map include Bristol, Waubay, Andover, and Butler, where town lots give way to larger tracts. Around 5,451 people call Day County home (Census Bureau estimate, 2023) across some 1,028 square miles. The county was formed in 1880, and some chains of title near Pierpont are long. Landmarks such as Waubay National Wildlife Refuge are easy to spot when you zoom out.
Legal descriptions in South Dakota
South Dakota follows the Public Land Survey System, which means a tract near Pierpont is described by section, township and range. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though real sections near Enemy Swim vary in size. Copy the legal description from the record for the parcel near Waubay before you request a deed or survey.
Next door to Day County
Day County touches Brown County, Clark County, Codington County, Grant County, and Marshall County, and each of those keeps its own parcel map. Acreage along the edge near Waubay may show up in two county records, so look at the neighboring map too. For property near Enemy Swim, the Platbookmapper state page links each neighboring county map across South Dakota.
Use the county map alongside FEMA
FEMA doesn't draw property lines, so check the District III regional GIS map too to see exactly which lot near Bristol you're looking at.
A short flood checklist
In and around Andover, request whether the home has flooded before closing; an insurance quote early avoids surprises.
Before you lean on the lines
For a parcel near Lily, the acreage figure is an estimate; just a licensed surveyor sets the real lines on the ground. For land near Lily, owner names and values update on a schedule, so a deed recorded last month may not show yet.
Money questions tied to the zone
For a tract near Crandall, ask for an Elevation Certificate: it compares the building to the BFE. New construction in a floodplain near Waubay often needs a floodplain permit; check with the county or town building office early.
Low spots and local drainage
Small streams around Enemy Swim aren't always studied in detail, so ask neighbors about past flooding. Marshy spots near Butler can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
Using it on a phone
Most viewers work in a phone browser, which helps when you're standing on land near Enemy Swim, though signal can drop in rural spots. A saved image of the lot near Enemy Swim and its lines keeps working without signal.
Offices that can help
Questions about value or the owner field for land near Lily are handled by the Director of Equalization, the office behind the parcel record. Zoning, permits and septic questions near Lily go to planning, building or health offices, town or county, depending on location.
Quick answers
What is a base flood elevation in Day County?
If the land is near Crandall, the BFE is printed in AE zones on FEMA's map; local rules may require building above it.
How do I check the flood zone for an address in Day County?
It depends, but look up the spot near Webster in FEMA's National Flood Hazard Layer viewer; no account is needed.
What is a LOMA near Crandall?
For property near Crandall, a Letter of Map Amendment (LOMA) from FEMA can remove a structure on naturally high ground; a surveyor's elevation data supports it.
Do I need to worry about flooding in Zone X around Bristol?
In most cases, shaded X is moderate risk and unshaded X is minimal risk; many owners near Butler buy coverage anyway.
Is there an app for the parcel map near Waubay National Wildlife Refuge?
In and around Lily, most viewers run in a mobile browser; screenshots help offline.
Open the official Day County, SD parcel map See it 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.