Humboldt County, Iowa
10 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-03
Safe water is the norm for most of Humboldt County's 10 ZIP codes — but a notable subset have documented violations that push the grade to the middle tier.
How Humboldt County Compares
How Humboldt County Compares
Humboldt County scores 0 points above the Iowa state average (59/100) and 9 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Humboldt County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.9 (asthma 10.1%, diabetes 13.2%)
Estimated additional annual cost per homeowner: $1,010, driven primarily by water_lead
Infrastructure: 0.54% avg pipe failure probability, 90% of ZIPs at high risk
87.2% 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: $1,010
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
4,753 housing units in Humboldt 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 Humboldt County
Remediation costs are relatively manageable for most homeowners in Humboldt 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 Humboldt 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 Humboldt County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Dakota City Water Supply | 769 | 6 |
| 2 | Humboldt Municipal Water Department | 4,792 | 6 |
| 3 | Deer Creek Subdivision (fort Dodge) | 55 | 6 |
| 4 | Becker Drive Road & Well, Llc | 50 | 6 |
| 5 | Gilmore City Waterworks | 487 | 2 |
13 total water systems serve Humboldt County.
All ZIP Codes in Humboldt County
10 ZIP codes tracked in Humboldt County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 50519 | Bode | 66 | C | 0 | $114K |
| 2 | 50529 | Dakota City | 66 | C | 0 | $119K |
| 3 | 50577 | Renwick | 66 | C | 0 | $101K |
| 4 | 50582 | Rutland | 66 | C | 0 | $70K |
| 5 | 50541 | Gilmore City | 65 | C | 2 (1 health) | $98K |
| 6 | 50558 | Livermore | 63 | C | 1 | $110K |
| 7 | 50548 | Humboldt | 62 | C | 6 | $178K |
| 8 | 50591 | Thor | 54 | D | 1 | $170K |
| 9 | 50570 | Ottosen | 43 | D | 0 | $114K |
| 10 | 50545 | Hardy | 40 | D | 0 | — |
Recommended Buyer Guides for Humboldt County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Lead Paint Test Kits — 87.2% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
Deep Dive Reports
Detailed analysis for Humboldt County, Iowa
Overview
Humboldt County in Iowa covers 10 ZIP codes with an average Home Safety Score of C (59/100).
4 of 10 ZIP codes have recorded EPA violations. 1 health-based violation 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.