Sac County, Iowa
9 ZIP codes · Avg score 63/100 · Grade C · Updated 2026-06-03
Tracking 9 ZIP codes in Sac County reveals a mixed picture — tap water quality varies meaningfully by location.
How Sac County Compares
How Sac County Compares
Sac County scores 4 points above the Iowa state average (59/100) and 5 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Sac County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.5 (asthma 9.9%, diabetes 12.5%)
Estimated additional annual cost per homeowner: $847, driven primarily by energy_code_gap
Infrastructure: 0.517% avg pipe failure probability, 89% of ZIPs at high risk
87.6% of homes built before 1978 (lead paint era)
Violation History (2022–2025)
→ Stable trendEPA violation counts by year across Sac County water systems. Health-based shown in red, total in blue.
Peak year: 2025 with 8 violations. Past 5 years: 11 total (11 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: $847
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
5,169 housing units in Sac 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 Sac County
Remediation costs are relatively manageable for most homeowners in Sac 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 Sac 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 Sac County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Early Municipal Water Supply | 587 | 5 |
| 2 | Lake View Water Supply | 1,133 | 3 |
| 3 | Schaller Water Supply | 729 | 1 |
| 4 | Rockwell City Water Supply | 2,250 | 0 |
| 5 | Sac City Municipal Water Plant | 2,063 | 0 |
10 total water systems serve Sac County.
All ZIP Codes in Sac County
9 ZIP codes tracked in Sac County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 51458 | Odebolt | 70 | B | 0 | $151K |
| 2 | 50561 | Lytton | 66 | C | 0 | $107K |
| 3 | 50583 | Sac City | 66 | C | 0 | $129K |
| 4 | 51433 | Auburn | 66 | C | 0 | $145K |
| 5 | 51466 | Wall Lake | 66 | C | 0 | $193K |
| 6 | 51053 | Schaller | 65 | C | 1 (1 health) | $97K |
| 7 | 51450 | Lake View | 65 | C | 3 | $177K |
| 8 | 50535 | Early | 60 | C | 5 (5 health) | $88K |
| 9 | 50567 | Nemaha | 40 | D | 0 | $169K |
Recommended Buyer Guides for Sac County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best Lead Paint Test Kits — 87.6% 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
Deep Dive Reports
Detailed analysis for Sac County, Iowa
Overview
Sac County in Iowa covers 9 ZIP codes with an average Home Safety Score of C (63/100).
3 of 9 ZIP codes have recorded EPA violations. 6 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.