Sumner County, Kansas
10 ZIP codes · Avg score 73/100 · Grade B · Updated 2026-06-03
Across all 10 ZIP codes in Sumner County, tap water consistently meets or exceeds federal safety standards.
How Sumner County Compares
How Sumner County Compares
Sumner County scores 9 points above the Kansas state average (64/100) and 5 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Sumner County, Kansas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14.3 (asthma 10.1%, diabetes 12.4%)
Estimated additional annual cost per homeowner: $983, driven primarily by flood
Infrastructure: 0.447% avg pipe failure probability, 90% of ZIPs at high risk
74.9% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↓ Improving trendEPA violation counts by year across Sumner County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 4 violations. Past 5 years: 14 total (14 health-based). Health-based violations are declining versus the prior 2-year window.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
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: $983
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
9,220 housing units in Sumner 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 Sumner County
Remediation costs are relatively manageable for most homeowners in Sumner 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 Sumner 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 Sumner County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Sumner Company Rwd 5 | 1,429 | 36 |
| 2 | Sumner Company Rwd 2 | 490 | 18 |
| 3 | Sedgwick Company Rwd 3 | 6,045 | 15 |
| 4 | City of Belle Plaine, | 1,468 | 15 |
| 5 | Sumner Company Rwd 6 | 298 | 15 |
17 total water systems serve Sumner County.
All ZIP Codes in Sumner County
10 ZIP codes tracked in Sumner County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 67022 | Caldwell | 83 | B | 0 | $79K |
| 2 | 67004 | Argonia | 82 | B | 3 | $117K |
| 3 | 67103 | Mayfield | 82 | B | 2 | $89K |
| 4 | 67051 | Geuda Springs | 81 | B | 1 | $87K |
| 5 | 67119 | Oxford | 79 | B | 3 | $119K |
| 6 | 67140 | South Haven | 78 | B | 5 | $94K |
| 7 | 67031 | Conway Springs | 76 | B | 6 | $157K |
| 8 | 67152 | Wellington | 66 | C | 12 | $105K |
| 9 | 67105 | Milan | 53 | D | 0 | $75K |
| 10 | 67013 | Belle Plaine | 48 | D | 15 (15 health) | $157K |
Recommended Buyer Guides for Sumner 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 — 74.9% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- 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 Sumner County, Kansas
Overview
Sumner County in Kansas covers 10 ZIP codes with an average Home Safety Score of B (73/100).
8 of 10 ZIP codes have recorded EPA violations. 15 health-based violations have been documented.
← Back to Kansas 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.