McClain County, Oklahoma
7 ZIP codes · Avg score 92/100 · Grade A · Updated 2026-06-03
Recent water monitoring in McClain County shows 7 ZIP codes with consistently safe results.
How McClain County Compares
How McClain County Compares
McClain County scores 13 points above the Oklahoma state average (79/100) and 24 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: McClain County, Oklahoma
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.6 (asthma 11.1%, diabetes 11.3%)
Estimated additional annual cost per homeowner: $664, driven primarily by flood
Infrastructure: 0.346% avg pipe failure probability, 29% of ZIPs at high risk
50% of homes built before 1978 (lead paint era)
Violation History (2022–2024)
→ Stable trendEPA violation counts by year across McClain County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 14 violations. Past 5 years: 30 total (20 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: $664
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
18,018 housing units in McClain 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 McClain County
Remediation costs are relatively manageable for most homeowners in McClain 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 McClain 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 McClain County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Purcell | 6,693 | 35 |
| 2 | Dibble | 550 | 28 |
| 3 | Cole | 473 | 26 |
| 4 | Newcastle | 7,900 | 26 |
| 5 | Washington | 600 | 24 |
18 total water systems serve McClain County.
All ZIP Codes in McClain County
7 ZIP codes tracked in McClain County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 73031 | Dibble | 97 | A | 2 (2 health) | — |
| 2 | 74831 | Byars | 95 | A | 0 | $121K |
| 3 | 73065 | Newcastle | 94 | A | 2 | $240K |
| 4 | 73093 | Washington | 94 | A | 8 (1 health) | $280K |
| 5 | 73095 | Wayne | 91 | A | 11 (1 health) | $154K |
| 6 | 73010 | Blanchard | 90 | A | 13 (2 health) | $242K |
| 7 | 73080 | Purcell | 81 | B | 3 | $207K |
Recommended Buyer Guides for McClain County
Designed to find the guide that fits the county, not the other way around — the system reads EPA detections, FEMA hazard layers, and CDC lead-exposure markers, then outputs the categories that resolve those specific risks for households here, with NSF-certified products surfaced when the matching contaminant appears in the local monitoring data.
- Best Lead Paint Test Kits — 50% 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 McClain County, Oklahoma
Overview
McClain County in Oklahoma covers 7 ZIP codes with an average Home Safety Score of A (92/100).
6 of 7 ZIP codes have recorded EPA violations. 6 health-based violations have been documented.
← Back to Oklahoma 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.