Brown County, Kansas
7 ZIP codes · Avg score 61/100 · Grade C · Updated 2026-06-03
Tracking 7 ZIP codes in Brown County reveals a mixed picture — tap water quality varies meaningfully by location.
How Brown County Compares
How Brown County Compares
Brown County scores 3 points below the Kansas state average (64/100) and 7 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Brown County, Kansas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15 (asthma 10.5%, diabetes 13.5%)
Estimated additional annual cost per homeowner: $634, driven primarily by water_lead
Infrastructure: 0.47% avg pipe failure probability, 86% of ZIPs at high risk
78.7% of homes built before 1978 (lead paint era)
Violation History (2024–2025)
→ Stable trendEPA violation counts by year across Brown County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 2 violations. Past 5 years: 4 total (4 health-based).
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: $634
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
4,460 housing units in Brown 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 Brown County
Remediation costs are relatively manageable for most homeowners in Brown 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 Brown 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 Brown County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Brown Company Rwd 2 | 724 | 13 |
| 2 | Brown Company Rwd 1 | 709 | 8 |
| 3 | City of Hiawatha, | 3,246 | 5 |
| 4 | City of Reserve, | 70 | 5 |
| 5 | City of Willis, | 38 | 5 |
12 total water systems serve Brown County.
All ZIP Codes in Brown County
7 ZIP codes tracked in Brown County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 66424 | Everest | 66 | C | 0 | — |
| 2 | 66532 | Robinson | 66 | C | 1 | $158K |
| 3 | 66439 | Horton | 64 | C | 4 | $82K |
| 4 | 66425 | Fairview | 63 | C | 3 | $104K |
| 5 | 66527 | Powhattan | 63 | C | 3 | $64K |
| 6 | 66515 | Morrill | 55 | C | 4 (4 health) | $92K |
| 7 | 66434 | Hiawatha | 47 | D | 5 | $132K |
Recommended Buyer Guides for Brown County
Retailer arrangements don't shape what appears here — the selection logic is independent, filtered against EPA detections and the federal hazard data on file for this county.
- Best Lead Paint Test Kits — 78.7% 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 Brown County, Kansas
Overview
Brown County in Kansas covers 7 ZIP codes with an average Home Safety Score of C (61/100).
6 of 7 ZIP codes have recorded EPA violations. 4 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.