Blog · October 17, 2026 · Illinois
Reading the Colona Flood Zone Map for a parcel
The zone on FEMA's map affects insurance, building and resale near Cleveland.
Main page: Henry County, IL GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Ahead of any purchase around Cambridge, pull up the Colona flood zone map: FEMA's zone label affects insurance, building rules and resale. What this Colona guide covers: the free FEMA tools, what each zone label means, when insurance is required and what a LOMA is.
The Colona flood zone map: start here
Flood zones come from FEMA's Flood Map Service Center: search an address around Coal Valley, then open the map view for that panel. A tract near Andover without an address is still easy to locate: zoom in from Interstate 280 then click the parcel area.
Pulling up a parcel
Parcels around Orion appear on the Henry County WTH GIS map, free to use and open without a login. When a rural tract has no street number, pan along Interstate 280 and select the outline. For acreage around Coal Valley, a pop-up or side panel typically gives the owner of record, acreage on the tax roll, the parcel number and in many cases the last transfer.
Getting answers from the right desk
Questions about value or the owner field for land near Orion go to the Supervisor of Assessments, working with township assessors, since that office keeps the assessment data. Zoning, permits and septic questions near Geneseo are for the local planning and health departments, and the answer depends on jurisdiction.
On site with the map
Most viewers work in a phone browser, which helps when you're standing on land near Cleveland, so load it before you lose signal. A screenshot of the parcel near Coal Valley with its ID helps when you meet an owner or agent.
Places you'll see on the map
Cambridge holds the county offices, which is where the courthouse records live. You'll also find Cleveland, Coal Valley, Orion, and Geneseo, each with its own cluster of lots. Roughly 48,448 people live in Henry County (Census estimate, 2023) spread over about 823 square miles. Henry County dates to 1825, and some chains of title near Cambridge are long.
Beyond the mapped zones
Creeks and ditches near Geneseo aren't always studied in detail, so walk the land after rain. Wet ground around Coal Valley is a separate issue from flood zones; the National Wetlands Inventory mapper shows mapped wetlands.
Colona, IL: the basics
Colona lies within Henry County, Illinois, which means parcel data comes from the county. On ground around Geneseo, city or town hall handles matters such as zoning, permits and utilities inside its limits, while the county keeps the tax map. Lots just outside the city limits toward Orion often falls under county rules rather than the town's.
A short flood checklist
Ask the listing agent about past flood claims for the house near Geneseo; an insurance quote early avoids surprises.
What the zone letters mean
For a home near Orion, zones beginning with A or V mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. With a lot near Cleveland, 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.
What the map can't tell you
Parcel lines are drawn for taxes, not surveyed, so a tree line near Cambridge often sits several feet off the line on screen. For property near Cleveland, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Matching the zone to the lot lines
FEMA doesn't draw property lines, so pair it with the Henry County WTH GIS map to see exactly which lot near Coal Valley you're looking at.
Recorded documents worth pulling
When the details count, pull the recorded deed from the county Recorder of Deeds (in many counties the County Clerk and Recorder); the parcel map near Andover only summarizes it. With a lot near Cambridge, have ready the document number listed on the parcel record so staff can find the deed fast.
Lenders and permits
On ground around Coal Valley, get the Elevation Certificate if one exists: it compares the building to the BFE. Building or adding on near Coal Valley in a mapped zone usually means extra permit review; check with the county or town building office before you plan.
Frequently asked
Is AE a high-risk flood zone around Cleveland?
AE is a Special Flood Hazard Area with a published base flood elevation, which shapes building rules near Cambridge.
Will my lender require flood insurance near Cleveland?
Short answer: for a building near Cleveland in an A or V zone with a federally backed or regulated mortgage, it's generally required; elsewhere it's optional.
Can I see flood zones on the Henry County WTH GIS map?
In most cases, a flood layer may appear in the Henry County WTH GIS map layer list; confirm a lot near Geneseo on FEMA's map either way.
How can I tell if a house near Cleveland is in a flood zone?
Look up the spot near Cambridge in FEMA's National Flood Hazard Layer viewer, and the zone code appears on the map.
Does the parcel map work on a phone for land near Geneseo?
For a home near Geneseo, most viewers run in a mobile browser; screenshots help offline.
Open the official Henry County, IL 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.