Blog · October 14, 2026 · California
Suisun City Flood Zone Map, California: a practical guide
Flood zones are set by FEMA, and checking one near Rio Vista takes a few minutes.
Main page: Solano County, CA GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Dixon? A quick look at the Suisun City flood zone map shows whether it sits in a FEMA flood zone, and it costs nothing to check. Covered here for Suisun City: the free FEMA tools, what each zone label means, when insurance is required and how to challenge a map that looks wrong.
Getting started with the Suisun City flood zone map
The official source is FEMA's Flood Map Service Center: search an address around Vallejo, then open the map view for that panel. Vacant ground around Rio Vista can still be found: pan from the closest town and click inside the land.
Pulling up a parcel
Your first stop is the Solano County parcel viewer; it maps each assessed parcel in the county, Dixon included. In and around Rio Vista, type a street address, an owner's name or a parcel number, and the matching parcel lights up. For a parcel near Rio Vista, the parcel card normally shows the owner of record, assessed acreage, a parcel ID and in many cases the last transfer.
Getting your bearings
Fairfield serves as the county seat, where most land records are kept. You'll also find Vacaville, Benicia, and Vallejo, each with its own cluster of lots. Around 449,218 people live in Solano County (Census estimate, 2023) on about 822 square miles. Features like San Pablo Bay National Wildlife Refuge are easy to spot when you zoom out from Benicia.
Recorded documents worth pulling
The map is an index, not the title: deeds, plats and easements covering ground around Rio Vista are filed with the County Recorder. Long-held tracts around Vacaville can trace back through several deeds, so a title company earns its fee on a real sale.
Suisun City, CA: the basics
Suisun City sits in Solano County, California, so its parcels are on the county's map. Near Vacaville, the municipality handles matters such as zoning, permits and utilities for lots inside the boundary, but the county runs assessment and recording. Land beyond the town limits near Fairfield often follows county rules rather than the town's.
What the zone letters mean
Out toward Rio Vista, any A or V zone are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any year. If you're looking near Rio Vista, minimal risk is not no risk: according to FEMA, many claims come from moderate- and low-risk areas.
Low spots and local drainage
Low-lying fields near Dixon may not have detailed mapping, so look for water marks and debris lines. Wetlands near Dixon can limit building even outside a flood zone; the National Wetlands Inventory mapper shows mapped wetlands.
Reading the legal description
California is laid out under the Public Land Survey System, so deeds around Dixon reference sections and townships. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though sections near Rio Vista can be irregular. Copy the legal description from the record for the parcel near Vacaville when you talk to a surveyor.
Lining it up with the parcel map
FEMA doesn't draw property lines, so pair it with the Solano County parcel viewer to see exactly which lot near Benicia you're looking at.
A short flood checklist
Ask the listing agent whether the home has flooded for the house near Vacaville; an insurance quote early avoids surprises.
When a parcel crosses a boundary
Solano County touches Contra Costa County, Marin County, Napa County, Sacramento County, and Sonoma County, and each of those keeps its own parcel map. A tract near the line by Fairfield may be split in two county records, so check the neighboring map too. On ground around Dixon, the Platbookmapper state page lists each bordering county map for California.
Getting answers from the right desk
Anything recorded against property around Fairfield are with the County Recorder, usually searchable by name or document number. Questions about what you can build around Benicia are for the local planning and health departments, and the answer depends on jurisdiction.
Money questions tied to the zone
For a parcel near Fairfield, get the Elevation Certificate if one exists: it compares the building to the BFE. New construction in a floodplain near Dixon usually means extra permit review; check with the county or town building office early.
Suisun City: common questions
What is a LOMA near Benicia?
Good question; you can ask FEMA for a LOMA if surveyed elevations show the building near Vallejo is above the BFE; it starts with an elevation survey.
When is flood insurance required around Fairfield?
In most cases, for a building near Rio Vista in an A or V zone with a federally backed or regulated mortgage, it's generally required; elsewhere it's optional.
Do I need to worry about flooding in Zone X for land near Vacaville?
In most cases, Zone X near Rio Vista means moderate (shaded) or minimal (unshaded) mapped risk; FEMA notes that a large share of claims come from these areas.
Does the county parcel map show flood zones in Suisun City?
Short answer: a flood layer may appear in the Solano County parcel viewer layer list, but FEMA's own map is the official source.
Can I download parcel lines near Rio Vista?
Use the print button or a screenshot; include the record panel for the lot near Vallejo.
Open the official Solano County, CA 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.