Lake County property record for 510 S Union Ave, Madison, SD 57042
| Property Type | City, Municipal, Town, Village Owned (Exempt) |
|---|---|
| Lot Size | 0.28 acres (12,197 sqft) |
| Owner | Company Name on File |
| Flood Zone | Zone X (moderate risk) |
| APN | 21760-00000-240-20 |
| Primary APN | 21760-00000-240-20 |
|---|
| Lot Area | 12,197 sqft (0.28 acres) |
|---|
| Street Address | 510 S UNION AVE |
|---|---|
| City | MADISON |
| State | SD |
| Zip | 57042 |
| Property Category | Public Works |
| Property Type | Public Works > City, Municipal, Town, Village Owned (Exempt) |
| Legal Description | S50' LOT 24 CO AUD 3RD ADD #2207M CITY FLOOD BUY OUT |
| Legal Subdivision | CO AUD 3RD ADD |
| Legal Lot Number | 24 |
| Jurisdiction | LAKE SD |
| Township / Civil Division | MADISON |
| Census Block Group | 2 |
| Census Block | 2073 |
| Census Tract | 960201 |
510 S Union Ave, a public works property, is owned by a company and is owner-occupied.
Source: Lake County records, as of November 1, 2025
| Owner of Record | Company Name on File |
|---|---|
| Mailing Address | 116 W CENTER ST, MADISON, SD 57042-2833 |
| Occupancy | Owner Occupied |
| Owner Type | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | Name on Deed |
|---|---|
| Record Updated | Jun 8, 2026 |
Source: Lake County assessment roll, as of November 1, 2025
| Type | Name |
|---|---|
| State | South Dakota |
| County | Lake County |
| Municipality | Madison City |
| Unified School District | Madison Central School District 39-2 (KG - 12) |
FEMA maps place 510 S Union Ave in Zone X, an area of moderate flood risk, within 100 ft of a high-risk flood zone.
Source: FEMA National Flood Hazard Layer, effective November 20, 2024 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X moderate risk |
|---|---|
| 500-Year Floodplain | Yes 0.2% annual chance |
| Nearest Special Flood Hazard Area | Zone AE, within 100 ft |
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 8 (10% premium discount) |
| Nearby Flood Policies | 6 in force |
| Nearby Flood Claims | 3 (2019) |
| Most Recent Claim | Sep 2019 · Severe Storms, Tornadoes, And Flooding |
| Claims by Event |
|
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Wildfire risk around 510 S Union Ave is low, with less than a 0.01% annual chance of wildfire.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Low lower than 99.1% of the US · lower than 98% of South Dakota |
|---|---|
| Wildfire Likelihood | Under 0.01% annual chance |
| Exposure | None beyond ember reach |
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | MADISON serves 6,191 people · EPA ID SD4600199 |
|---|---|
| Water Source | Groundwater |
| Last State Inspection | Sep 2024 |
| Lead | 2 ppb (2023) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 157 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Midco Cable | 2,000 / 350 |
| Bluepeak Cable · Fiber in parts of the area | 1,000 / 30 |
May also be available: GigFire, Interlakes Wireless, Verizon.
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