Ottawa County, Kansas
5 ZIP codes · Avg score 58/100 · Grade C · Updated 2026-06-03
Ottawa County shows moderate water quality across its 5 ZIP codes — some areas carry violations worth monitoring.
How Ottawa County Compares
How Ottawa County Compares
Ottawa County scores 6 points below the Kansas state average (64/100) and 10 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Ottawa 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 (asthma 10%, diabetes 12.2%)
Estimated additional annual cost per homeowner: $1,062, driven primarily by flood
Infrastructure: 0.422% avg pipe failure probability, 60% of ZIPs at high risk
71.8% 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: $1,062
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
2,801 housing units in Ottawa 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 Ottawa County
Remediation costs are relatively manageable for most homeowners in Ottawa 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 Ottawa 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 Ottawa County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Ottawa Company Rwd 2 | 1,794 | 48 |
| 2 | Ottawa Company Rwd 1 | 198 | 44 |
| 3 | Ellsworth Company Rwd 1 | 3,128 | 44 |
| 4 | Saline Company Rwd 4 | 768 | 31 |
| 5 | City of Tescott, | 271 | 31 |
11 total water systems serve Ottawa County.
All ZIP Codes in Ottawa County
5 ZIP codes tracked in Ottawa County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 67467 | Minneapolis | 69 | C | 13 (1 health) | $156K |
| 2 | 67436 | Delphos | 64 | C | 1 | $72K |
| 3 | 67422 | Bennington | 62 | C | 3 | $223K |
| 4 | 67484 | Tescott | 51 | D | 31 | $171K |
| 5 | 67470 | New Cambria | 45 | D | 0 | $177K |
Recommended Buyer Guides for Ottawa 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 Lead Paint Test Kits — 71.8% of homes built before 1978
- Best Radon Test Kits — EPA Radon Zone 1 (highest risk) dominant in county
- 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 Ottawa County, Kansas
Overview
Ottawa County in Kansas covers 5 ZIP codes with an average Home Safety Score of C (58/100).
4 of 5 ZIP codes have recorded EPA violations. 1 health-based violation 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.