Cass County, Iowa
9 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-07-16
ZipCheckup grade for Cass: C.
A mixed picture - some signals here are worth your attention.
Across Cass County, EPA compliance data for 9 ZIP codes sits at a moderate level - not alarming, but not uniformly clean either.
How Cass County Compares
How Cass County Compares
Cass 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: 2026-07-16
ZIP Code Risk Map
Water Quality Map: Cass County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.2 (asthma 10.2%, diabetes 13.8%)
Estimated additional annual cost per homeowner: $1,498, driven primarily by flood
Infrastructure: 0.583% avg pipe failure probability, 56% of ZIPs at high risk
86% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Cass County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 2 violations. Past 5 years: 5 total (5 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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: $1,498
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
6,882 housing units in Cass 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 Cass County
Remediation costs are relatively manageable for most homeowners in Cass 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 Cass County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Cass County
7 community water systems serving Cass County.
- D
- C
- B
- C
- C
- C
Show all 7 water systems
- C
Systems with the most violations in Cass County
5 water systems with recorded EPA violations.
- C
- C
- C
- C
- B
All ZIP Codes in Cass County
9 ZIP codes tracked in Cass County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 50020 | Anita | 70 | B | 1 | $121K |
| 2 | 50843 | Cumberland | 66 | C | 0 | $82K |
| 3 | 50022 | Atlantic | 65 | C | 0 | $146K |
| 4 | 51544 | Lewis | 65 | C | 2 (1 health) | $85K |
| 5 | 51535 | Griswold | 61 | C | 2 | $136K |
| 6 | 50853 | Massena | 60 | C | 11 (2 health) | $211K |
| 7 | 50274 | Wiota | 59 | C | 8 | $127K |
| 8 | 50837 | Bridgewater | 40 | D | 0 | $108K |
| 9 | 51552 | Marne | 40 | D | 0 | $110K |
Recommended Buyer Guides for Cass County
Where county records show a lead exceedance or pre-1978 housing concentration, lead-specific filters and test kits move toward the top of the list.
- Best Lead Paint Test Kits — 86% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for Cass County, Iowa
Overview
Cass County in Iowa covers 9 ZIP codes with an average Home Safety Score of C (58/100).
5 of 9 ZIP codes have recorded EPA violations. 3 health-based violations have been documented.
← 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.