Sequoyah County, Oklahoma
7 ZIP codes · Avg score 64/100 · Grade C · Updated 2026-06-03
Tracking 7 ZIP codes in Sequoyah County reveals a mixed picture — tap water quality varies meaningfully by location.
How Sequoyah County Compares
How Sequoyah County Compares
Sequoyah County scores 15 points below the Oklahoma state average (79/100) and 4 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Sequoyah County, Oklahoma
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 17.5 (asthma 12.8%, diabetes 16.6%)
Estimated additional annual cost per homeowner: $920, driven primarily by flood
Infrastructure: 0.38% avg pipe failure probability, 43% of ZIPs at high risk
53.3% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
→ Stable trendEPA violation counts by year across Sequoyah County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 24 violations. Past 5 years: 59 total (59 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: $920
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
18,380 housing units in Sequoyah 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 Sequoyah County
Remediation costs are relatively manageable for most homeowners in Sequoyah 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 Sequoyah 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 Sequoyah County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | SEQUOYAH CO. RWD #8 | 13,460 | 93 |
| 2 | Gore Pwa | 1,688 | 77 |
| 3 | Sequoyah Company Rwd #5 | 1,075 | 77 |
| 4 | Vian | 1,445 | 43 |
| 5 | Canoe Mountain Water System | 26 | 43 |
18 total water systems serve Sequoyah County.
All ZIP Codes in Sequoyah County
7 ZIP codes tracked in Sequoyah County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 74955 | Sallisaw | 72 | B | 10 (3 health) | $125K |
| 2 | 74936 | Gans | 71 | B | 9 (1 health) | $136K |
| 3 | 74954 | Roland | 70 | B | 1 | $143K |
| 4 | 74962 | Vian | 67 | C | 43 (2 health) | $133K |
| 5 | 74948 | Muldrow | 60 | C | 6 (3 health) | $120K |
| 6 | 74435 | Gore | 58 | C | 24 (13 health) | $134K |
| 7 | 74945 | Marble City | 53 | D | 0 | $78K |
Recommended Buyer Guides for Sequoyah County
Filtered against EPA monitoring data and CDC lead-exposure guidance, the guides below skip the generic catalog and connect directly to the contaminants and hazards on file here.
- Best Lead Paint Test Kits — 53.3% 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 Sequoyah County, Oklahoma
Overview
Sequoyah County in Oklahoma covers 7 ZIP codes with an average Home Safety Score of C (64/100).
6 of 7 ZIP codes have recorded EPA violations. 22 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.