Polk County, Missouri
7 ZIP codes · Avg score 76/100 · Grade B · Updated 2026-06-03
Within Polk County, all 7 tracked ZIP codes show above-average drinking water safety — violations are infrequent and typically minor.
How Polk County Compares
How Polk County Compares
Polk County scores 7 points above the Missouri state average (69/100) and 8 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Polk County, Missouri
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.9 (asthma 10.9%, diabetes 13%)
Estimated additional annual cost per homeowner: $240, driven primarily by energy_code_gap
Infrastructure: 0.314% avg pipe failure probability
49.3% 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: $240
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
12,091 housing units in Polk 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 Polk County
Remediation costs are relatively manageable for most homeowners in Polk 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 Polk 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 Polk County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Humansville Public Water System | 1,048 | 4 |
| 2 | Liberty Utilities Bolivar | 11,000 | 3 |
| 3 | Silo Ridge | 400 | 3 |
| 4 | Bolivar Southtown Utilities Company Inc. | 573 | 3 |
| 5 | Lake Meadows Mhp | 100 | 3 |
11 total water systems serve Polk County.
All ZIP Codes in Polk County
7 ZIP codes tracked in Polk County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 65649 | Fair Play | 83 | B | 0 | $286K |
| 2 | 65650 | Flemington | 83 | B | 1 | $97K |
| 3 | 65710 | Morrisville | 83 | B | 0 | $206K |
| 4 | 65613 | Bolivar | 82 | B | 3 | $197K |
| 5 | 65674 | Humansville | 77 | B | 0 | $116K |
| 6 | 65617 | Brighton | 72 | B | 0 | $206K |
| 7 | 65640 | Dunnegan | 53 | D | 0 | $172K |
Recommended Buyer Guides for Polk County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Water Testing Kits — Baseline water quality check for your ZIP
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant peace of mind
Deep Dive Reports
Detailed analysis for Polk County, Missouri
Overview
Polk County in Missouri covers 7 ZIP codes with an average Home Safety Score of B (76/100).
2 of 7 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← 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.