Marshall County, Iowa
13 ZIP codes · Avg score 57/100 · Grade C · Updated 2026-06-03
Water safety in Marshall County is uneven — some of its 13 ZIP codes meet standards cleanly while others carry documented violations.
How Marshall County Compares
How Marshall County Compares
Marshall County scores 2 points below the Iowa state average (59/100) and 11 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Marshall County, Iowa
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.8 (asthma 9.5%, diabetes 12.7%)
Estimated additional annual cost per homeowner: $785, driven primarily by energy_code_gap
Infrastructure: 0.477% avg pipe failure probability, 85% of ZIPs at high risk
80.2% 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: $785
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
16,689 housing units in Marshall 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 Marshall County
Remediation costs are relatively manageable for most homeowners in Marshall 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 Marshall 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 Marshall County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Marshalltown Water Works | 27,591 | 24 |
| 2 | Ackley Municipal Water Works | 1,599 | 24 |
| 3 | Clarksville Water Supply | 1,254 | 24 |
| 4 | Crescent Water Supply | 778 | 24 |
| 5 | Dumont Water Supply | 635 | 24 |
16 total water systems serve Marshall County.
All ZIP Codes in Marshall County
13 ZIP codes tracked in Marshall County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 50051 | Clemons | 66 | C | 0 | — |
| 2 | 50106 | Gilman | 66 | C | 0 | $112K |
| 3 | 50141 | Laurel | 66 | C | 0 | $139K |
| 4 | 50142 | Le Grand | 66 | C | 0 | $124K |
| 5 | 50234 | Rhodes | 66 | C | 0 | $163K |
| 6 | 50005 | Albion | 64 | C | 1 | $130K |
| 7 | 50162 | Melbourne | 64 | C | 0 | $183K |
| 8 | 50247 | State Center | 59 | C | 5 | $167K |
| 9 | 50148 | Liscomb | 55 | C | 0 | $96K |
| 10 | 50158 | Marshalltown | 47 | D | 24 (6 health) | $131K |
| 11 | 50078 | Ferguson | 40 | D | 0 | $76K |
| 12 | 50120 | Haverhill | 40 | D | 0 | $178K |
| 13 | 50239 | Saint Anthony | 40 | D | 0 | — |
Recommended Buyer Guides for Marshall County
Independent picks. EPA-grounded. Matched here.
- Best Lead Paint Test Kits — 80.2% 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 Marshall County, Iowa
Overview
Marshall County in Iowa covers 13 ZIP codes with an average Home Safety Score of C (57/100).
3 of 13 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.