Cass County, Nebraska
14 ZIP codes · Avg score 64/100 · Grade C · Updated 2026-06-03
Cass County's water quality grade reflects a middle-ground assessment — its 14 ZIP codes range from fully compliant to violation-flagged.
How Cass County Compares
How Cass County Compares
Cass County scores 1 points below the Nebraska state average (65/100) and 4 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Cass County, Nebraska
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.8 (asthma 9.2%, diabetes 10.8%)
Estimated additional annual cost per homeowner: $1,266, driven primarily by flood
Infrastructure: 0.376% avg pipe failure probability, 50% of ZIPs at high risk
65.5% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↑ Worsening trendEPA violation counts by year across Cass County water systems. Health-based shown in red, total in blue.
Peak year: 2023 with 2 violations. Past 5 years: 5 total (5 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
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: $1,266
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
11,200 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 with Most Violations
Top 5 systems in Cass County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Otoe Company Rwd #3 - Louisville | 630 | 2 |
| 2 | Cass Company Rwd 2 | 1,860 | 2 |
| 3 | Elmwood, Village of | 698 | 2 |
| 4 | City of Ashland, | 3,086 | 2 |
| 5 | Greenwood, Village of | 600 | 2 |
25 total water systems serve Cass County.
All ZIP Codes in Cass County
14 ZIP codes tracked in Cass County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 68058 | South Bend | 70 | B | 0 | $473K |
| 2 | 68307 | Avoca | 70 | B | 1 | $171K |
| 3 | 68347 | Eagle | 67 | C | 0 | $221K |
| 4 | 68403 | Manley | 66 | C | 1 | $205K |
| 5 | 68407 | Murdock | 66 | C | 0 | $309K |
| 6 | 68409 | Murray | 66 | C | 0 | $223K |
| 7 | 68037 | Louisville | 65 | C | 1 | $254K |
| 8 | 68413 | Nehawka | 65 | C | 0 | $293K |
| 9 | 68349 | Elmwood | 64 | C | 2 (2 health) | $222K |
| 10 | 68463 | Weeping Water | 64 | C | 2 (1 health) | $208K |
| 11 | 68455 | Union | 60 | C | 0 | $309K |
| 12 | 68304 | Alvo | 59 | C | 1 (1 health) | $307K |
| 13 | 68048 | Plattsmouth | 58 | C | 1 | $256K |
| 14 | 68366 | Greenwood | 51 | D | 2 (1 health) | $207K |
Recommended Buyer Guides for Cass County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Lead Paint Test Kits — 65.5% 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, Nebraska
Overview
Cass County in Nebraska covers 14 ZIP codes with an average Home Safety Score of C (64/100).
8 of 14 ZIP codes have recorded EPA violations. 5 health-based violations have been documented.
← Back to Nebraska 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.