Webster County, Missouri
5 ZIP codes · Avg score 77/100 · Grade B · Updated 2026-06-03
Webster County earns a high water safety grade — 5 ZIP codes tracked, virtually all compliant.
How Webster County Compares
How Webster County Compares
Webster County scores 8 points above the Missouri state average (69/100) and 9 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Webster County, Missouri
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.7 (asthma 10.8%, diabetes 12.2%)
Estimated additional annual cost per homeowner: $622, driven primarily by wildfire
Infrastructure: 0.326% avg pipe failure probability, 20% of ZIPs at high risk
49.8% 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: $622
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
12,326 housing units in Webster 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 Webster County
Remediation costs are relatively manageable for most homeowners in Webster 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 Webster 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 Webster County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Marshfield Public Water System | 7,425 | 13 |
| 2 | Fountain Plaza Mhp | 186 | 13 |
| 3 | Joyce Rentals | 70 | 13 |
| 4 | Oak Ridge Estates | 25 | 13 |
| 5 | Lazy J Rv Park | 20 | 13 |
14 total water systems serve Webster County.
All ZIP Codes in Webster County
5 ZIP codes tracked in Webster County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 65632 | Conway | 83 | B | 0 | $202K |
| 2 | 65713 | Niangua | 82 | B | 10 (1 health) | $190K |
| 3 | 65746 | Seymour | 79 | B | 0 | $191K |
| 4 | 65636 | Diggins | 70 | B | 2 | — |
| 5 | 65706 | Marshfield | 70 | B | 13 | $234K |
Recommended Buyer Guides for Webster County
Four sources — EPA, NSF, FEMA, CDC — drive the match.
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Webster County, Missouri
Overview
Webster County in Missouri covers 5 ZIP codes with an average Home Safety Score of B (77/100).
3 of 5 ZIP codes have recorded EPA violations. 1 health-based violation have been documented.
← Back to Missouri 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.