COUNTY REPORT SD

Clay County, South Dakota

3 ZIP codes · Avg score 67/100 · Grade C · Updated

ZipCheckup grade for Clay County: C.

A mixed picture - some signals here are worth your attention.

Clay County shows moderate water quality across its 3 ZIP codes - some areas carry violations worth monitoring.

How Clay County Compares

Clay County67/100
South Dakota avg69/100
National avg73/100

How Clay County Compares

C
County Grade
67/100
Avg Safety Score
3
ZIP Codes
3
Water Systems

Clay County scores 2 points below the South Dakota state average (69/100) and 6 points below the national average (73/100).

Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:

C
County Grade
67
Avg Safety Score
3
ZIP Codes
Best ZIP: 57010 (67/100)
Lowest ZIP: 57073 (67/100)
$222K
Median Home Value
$2,100
Avg Remediation (95% of home value)

Key Risk Factors

Health risk index: 10.7 (asthma 10.5%, diabetes 8.1%)

Estimated additional annual cost per homeowner: $1,027, driven primarily by flood

74.3% of homes built before 1978 (lead paint era)

County Health Indicators vs National Average

Asthma 10.5% (national: 8.9%)
Diabetes 8.1% (national: 10.5%)
Obesity 34.7% (national: 32.4%)

Black markers indicate national averages. Source: CDC PLACES, Census ACS.

Infrastructure Overview

1962
Median Build Year
74.3%
Pre-1978 Housing
48/100
Infrastructure Stress Indicator
67%
ZIPs with High Infrastructure Stress
High
Lead Pipe Risk

Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.

Compound Risk Breakdown

Estimated additional annual cost per homeowner: $1,027

Flood $400/yr
Water / Lead $317/yr
Water Infrastructure $233/yr

Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).

Housing Age Distribution

5,856 housing units in Clay County

Pre-1940 20%
1940–1959 9%
1960–1979 26%
1980–1999 24%
2000+ 21%

Source: U.S. Census Bureau ACS B25034 (Year Structure Built).

Water Safety Affordability

How much it costs to fix water issues relative to home values in Clay County

$222K
Median Home Value
$2,100
Est. Remediation Cost
0.9%
of Home Value
Remediation as % of home value low burden

Remediation costs are relatively manageable for most homeowners in Clay County, representing a small fraction of property value.

Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.

Health Outcomes vs National Average

CDC PLACES data for Clay County residents

Asthma 10.5% (US avg: 8.9%)
Diabetes 8.1% (US avg: 11%)
Obesity 34.7% (US avg: 32.4%)

Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.

Water systems serving Clay County

3 community water systems serving Clay County.

All ZIP Codes in Clay County

3 ZIP codes tracked in Clay County.

# ZIP Code City Safety Score Grade Violations Home Value
1 57010 Burbank 67 C 0 $222K
2 57069 Vermillion 67 C 0 $226K
3 57073 Wakonda 67 C 0 $114K

Recommended Buyer Guides for Clay County

Editorial methodology pairs each documented risk in this county with the buyer category that addresses it, drawing on water-quality detections, housing-stock lead exposure, EPA Radon Zone designation, and FEMA flood and wildfire ratings. NSF-certified options surface where applicable, and products that match the specific contaminant take priority.

Overview

Clay County in South Dakota covers 3 tracked ZIP records with an average Home Safety Score of C (67/100) across 3 scored records.

The available EPA record reports 0 violations for 3 ZIP codes with a reported violation count.

← Back to South Dakota Home Safety Profile

Data Sources

Reporting periods vary by source. Missing data is shown as unavailable, not as zero.

Frequently Asked Questions

Is water safe in Clay County?
Clay County receives a grade of C. Some ZIP codes have recorded violations and residents in affected areas may want to test their water.
How many water systems serve Clay County?
Clay County is served by 3 public water systems that supply drinking water to residents across 3 ZIP codes.
What is the biggest environmental risk in Clay County?
The primary environmental risk factor in Clay County is flood. This contributes to an estimated additional annual cost of $1,027 per homeowner.
How old are homes in Clay County?
The median home build year in Clay County is 1962. 74.3% of homes were built before 1978, which means they may contain lead-based paint and older plumbing materials.
How does Clay County compare to South Dakota?
Clay County has an average Home Safety Score of 67/100 under model 4.0.0, which is below the South Dakota state average of 69/100.

How to cite this page

APA ZipCheckup. (2026). Clay County, SD: HSS 67/100; High Radon Risk. https://zipcheckup.com/county/south-dakota/clay/
BibTeX
@misc{zipcheckup-county-south-dakota-clay,
  author = {{ZipCheckup}},
  title  = {{Clay County, SD: HSS 67/100; High Radon Risk}},
  year   = {2026},
  url    = {https://zipcheckup.com/county/south-dakota/clay/}
}

Page version: August 2026.

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