Grundy County, Iowa
10 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-06-03
Recent monitoring in Grundy County's 10 ZIP codes shows middle-tier safety — some systems are clean; others have logged EPA violations.
How Grundy County Compares
How Grundy County Compares
Grundy County scores 1 points below the Iowa state average (59/100) and 10 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Grundy County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.4 (asthma 9.8%, diabetes 11.3%)
Estimated additional annual cost per homeowner: $709, driven primarily by water_lead
Infrastructure: 0.465% avg pipe failure probability, 80% of ZIPs at high risk
78.9% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $709
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
5,119 housing units in Grundy County
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 Grundy County
Remediation costs are relatively manageable for most homeowners in Grundy 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 Grundy County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Grundy County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | REINBECK WATER SUPPLY | 1,662 | 1 |
| 2 | Beaman Water Supply | 161 | 0 |
| 3 | Conrad Water Supply | 1,098 | 0 |
| 4 | Dike Water Supply | 1,306 | 0 |
| 5 | Grundy Center Water Supply | 2,796 | 0 |
8 total water systems serve Grundy County.
All ZIP Codes in Grundy County
10 ZIP codes tracked in Grundy County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 50621 | Conrad | 70 | B | 0 | $185K |
| 2 | 50624 | Dike | 70 | B | 0 | $244K |
| 3 | 50638 | Grundy Center | 70 | B | 0 | $181K |
| 4 | 50642 | Holland | 66 | C | 0 | $181K |
| 5 | 50673 | Stout | 66 | C | 0 | $121K |
| 6 | 50680 | Wellsburg | 66 | C | 0 | $124K |
| 7 | 50609 | Beaman | 55 | C | 0 | $213K |
| 8 | 50652 | Lincoln | 40 | D | 0 | $103K |
| 9 | 50657 | Morrison | 40 | D | 0 | $138K |
| 10 | 50669 | Reinbeck | 34 | F | 1 | $165K |
Recommended Buyer Guides for Grundy County
Retailer arrangements don't shape what appears here — the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Lead Paint Test Kits — 78.9% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Grundy County, Iowa
Overview
Grundy County in Iowa covers 10 ZIP codes with an average Home Safety Score of C (58/100).
1 of 10 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Iowa water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.