The 2025 property tax bill for 821 Duff Ave was $2,684 with a homeowner's exemption, down 11.1% from the year before.
Source: Story County assessment roll, as of September 30, 2025
Property Jurisdictions
Type
Name
State
Iowa
Municipality
Ames City
County
Story County
Unified School District
Ames Community School District (PK - 12)
Tax Bill & Assessment History
Year
Tax Bill
Assessed Value
Assessed Market Value
2025
$2,684.00 (-11.13%)Homeowner's exemption
$206,000Land $25,800Building $180,200
$206,000Land $25,800Building $180,200
2024
$3,020.00
2023
$226,900Land $25,800Building $201,100
$226,900Land $25,800Building $201,100
2022
$2,690.00
Assessed value and assessed market value are set for property tax purposes and are not market price estimates.
Flood
FEMA maps place 821 Duff Ave in Zone X, an area of minimal flood risk, though there have been 6 flood claims nearby since 1990.
Source: FEMA National Flood Hazard Layer, effective May 25, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
FEMA Flood Zone
Zone X minimal risk
Flood Insurance Requirement
Not required lenders may require it
Nearby Flood Claims
6 (1990–2010)
Most Recent Claim
Aug 2010 · Severe Storms, Flooding, And Tornadoes
Claims by Event
Severe Storms & Flooding, Jul 1993 · 3 claims
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
Wildfire risk around 821 Duff 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 99.8% of the US · lower than 98.1% of Iowa
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.
Drinking Water
Source: EPA Safe Drinking Water Information System, as of September 2026
Water System
AMES WATER TREATMENT PLANT serves 55,177 people · EPA ID IA8503039
Water Source
Groundwater
Last State Inspection
Oct 2023
Lead
Under 1 ppb (2023–2025) action level 15 ppb
Violations Reported to EPA
Water Quality
None last 10 years
Treatment and Procedure
None last 10 years
Monitoring and Reporting
1 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.
Internet Providers
Source: FCC Broadband Data Collection, based on 520 locations within half a mile, as of December 31, 2025
Provider
Max Down / Up (Mbps)
Metronet Fiber
5,120 / 5,120
Mediacom Xtream Cable · Fiber in parts of the area
1,000 / 50
Verizon Fixed Wireless
300 / 20
May also be available: ICS Advanced Technologies, T-Mobile.