Fremont County, Iowa
9 ZIP codes · Avg score 60/100 · Grade C · Updated 2026-06-03
Based on current EPA data, Fremont County's 9 ZIP codes reflect fair but mixed water safety.
How Fremont County Compares
How Fremont County Compares
Fremont County scores 1 points above the Iowa state average (59/100) and 8 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Fremont County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.4 (asthma 10%, diabetes 12.7%)
Estimated additional annual cost per homeowner: $1,404, driven primarily by flood
Infrastructure: 0.492% avg pipe failure probability, 89% of ZIPs at high risk
77.4% 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: $1,404
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,138 housing units in Fremont 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 Fremont County
Remediation costs are relatively manageable for most homeowners in Fremont 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 Fremont 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 Fremont County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Sidney Water Supply | 1,077 | 6 |
| 2 | RANDOLPH WATER WORKS | 192 | 3 |
| 3 | THURMAN WATER WORKS | 167 | 3 |
| 4 | Tabor Water Supply | 1,014 | 3 |
| 5 | Riverton Water Works | 250 | 2 |
7 total water systems serve Fremont County.
All ZIP Codes in Fremont County
9 ZIP codes tracked in Fremont County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 51639 | Farragut | 70 | B | 0 | $137K |
| 2 | 51649 | Randolph | 65 | C | 3 | $176K |
| 3 | 51654 | Thurman | 65 | C | 0 | $228K |
| 4 | 51653 | Tabor | 63 | C | 3 | $213K |
| 5 | 51650 | Riverton | 62 | C | 2 | $48K |
| 6 | 51640 | Hamburg | 60 | C | 0 | $120K |
| 7 | 51652 | Sidney | 59 | C | 3 | $141K |
| 8 | 51645 | Imogene | 53 | D | 0 | $118K |
| 9 | 51648 | Percival | 40 | D | 0 | $142K |
Recommended Buyer Guides for Fremont County
Filtered against EPA monitoring data and CDC lead-exposure guidance, the guides below skip the generic catalog and connect directly to the contaminants and hazards on file here.
- Best Lead Paint Test Kits — 77.4% of homes built before 1978
- 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 Fremont County, Iowa
Overview
Fremont County in Iowa covers 9 ZIP codes with an average Home Safety Score of C (60/100).
4 of 9 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.