Logan County, Oklahoma
8 ZIP codes · Avg score 86/100 · Grade A · Updated 2026-06-03
Water systems in Logan County serve 8 ZIP codes with few reported safety events.
How Logan County Compares
How Logan County Compares
Logan County scores 7 points above the Oklahoma state average (79/100) and 18 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Logan County, Oklahoma
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 14 (asthma 11.2%, diabetes 12%)
Estimated additional annual cost per homeowner: $1,034, driven primarily by flood
Infrastructure: 0.366% avg pipe failure probability, 25% of ZIPs at high risk
57% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
↓ Improving trendEPA violation counts by year across Logan County water systems. Health-based shown in red, total in blue.
Peak year: 2021 with 13 violations. Past 5 years: 32 total (32 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: $1,034
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
13,728 housing units in Logan 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 Logan County
Remediation costs are relatively manageable for most homeowners in Logan 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 Logan 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 Logan County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Logan Company Rws & Swmd #3 | 1,618 | 37 |
| 2 | Crescent | 1,411 | 30 |
| 3 | Logan Company Rwd #2 | 1,146 | 30 |
| 4 | Guthrie | 9,925 | 22 |
| 5 | Logan Company Rwd #1 | 8,907 | 22 |
16 total water systems serve Logan County.
All ZIP Codes in Logan County
8 ZIP codes tracked in Logan County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 73073 | Orlando | 99 | A | 0 | $306K |
| 2 | 73027 | Coyle | 95 | A | 0 | — |
| 3 | 73063 | Mulhall | 94 | A | 6 (1 health) | $179K |
| 4 | 73028 | Crescent | 88 | A | 2 | $145K |
| 5 | 73050 | Langston | 86 | A | 9 (2 health) | — |
| 6 | 73056 | Marshall | 84 | B | 7 (3 health) | $51K |
| 7 | 73044 | Guthrie | 75 | B | 22 (5 health) | $200K |
| 8 | 73058 | Meridian | 66 | C | 0 | $173K |
Recommended Buyer Guides for Logan County
Strictly editorial — no paid placements influence which guides appear; the selection draws on NSF certifications and EPA detection records for water systems serving this county.
- Best Lead Paint Test Kits — 57% 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 Logan County, Oklahoma
Overview
Logan County in Oklahoma covers 8 ZIP codes with an average Home Safety Score of A (86/100).
5 of 8 ZIP codes have recorded EPA violations. 11 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.