Kay County, Oklahoma
9 ZIP codes · Avg score 77/100 · Grade B · Updated
ZipCheckup grade for Kay County: B.
This ZIP looks solid, with a few items worth a quick check.
Throughout Kay County, the 9 monitored ZIP codes show low violation rates and healthy safety scores - a pattern that puts the county well above the state baseline for drinking water quality.
How Kay County Compares
How Kay County Compares
Kay County scores 9 points below the Oklahoma state average (86/100) and 4 points above the national average (73/100).
Data: ZipCheckup Home Safety Score model 4.0.0; EPA SDWIS, UCMR 5, EPA radon zones, EPA AirData Last verified:
ZIP Code Risk Map
Water Quality Map: Kay County, Oklahoma
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 15.6 (asthma 11.8%, diabetes 14.1%)
Estimated additional annual cost per homeowner: $2,076, driven primarily by flood
78.9% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Kay County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 30 violations. Past 5 years: 91 total (91 health-based). Health-based violations are rising versus the prior 2-year window - worth closer monitoring.
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
Modeled area-level indicator, not a failure probability. Sources: Census ACS housing age, EPA DWINS infrastructure needs, EPA SDWIS violations, and EPA lead indicators.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $2,076
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
22,178 housing units in Kay 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 Kay County
Remediation costs are relatively manageable for most homeowners in Kay 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 Kay County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Kay County
8 community water systems serving Kay County.
- C
- A
- A
- C
- C
Show all 8 water systems
- A
- C
11 total water systems serve Kay County.
Systems with the most violations in Kay County
5 water systems with recorded EPA violations.
- A
- A
- C
All ZIP Codes in Kay County
9 ZIP codes tracked in Kay County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 74631 | Blackwell | 87 | A | 23 (14 health) | $77K |
| 2 | 74604 | Ponca City | 67 | C | 210 (55 health) | $198K |
| 3 | 74601 | Ponca City | — | — | 30 (22 health) | $95K |
| 4 | 74602 | Ponca City | — | — | — | |
| 5 | 74632 | Braman | — | — | 3 (3 health) | — |
| 6 | 74641 | Kaw City | — | — | 22 (18 health) | $132K |
| 7 | 74646 | Nardin | — | — | 23 (14 health) | — |
| 8 | 74647 | Newkirk | — | — | 146 (21 health) | $110K |
| 9 | 74653 | Tonkawa | — | — | 10 (4 health) | $86K |
Recommended Buyer Guides for Kay 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 — 78.9% 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 Kay County, Oklahoma
Overview
Kay County in Oklahoma covers 9 tracked ZIP records with an average Home Safety Score of B (77/100) across 2 scored records.
8 of 8 ZIP codes with a reported violation count in the available EPA record have recorded EPA violations. 69 health-based violations appear in the available health breakdown.
← Back to Oklahoma Home Safety Profile
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- PFAS screening: EPA UCMR 5
- Radon zones: EPA Map of Radon Zones
- Air quality: EPA AirData annual AQI
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.