Coal County, Oklahoma
6 ZIP codes · Avg score 87/100 · Grade A · Updated 2026-06-03
In current tracking cycles, Coal County — spanning 6 ZIP codes — records above-average water quality outcomes; the county's compliance history over recent years shows few departures from federal standards.
How Coal County Compares
How Coal County Compares
Coal County scores 8 points above the Oklahoma state average (79/100) and 19 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Coal County, Oklahoma
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 17.6 (asthma 12.8%, diabetes 17.2%)
Estimated additional annual cost per homeowner: $685, driven primarily by wildfire
Infrastructure: 0.383% avg pipe failure probability, 33% of ZIPs at high risk
60.5% of homes built before 1978 (lead paint era)
Violation History (2024–2025)
→ Stable trendEPA violation counts by year across Coal County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 12 violations. Past 5 years: 21 total (21 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: $685
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
2,657 housing units in Coal 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 Coal County
Remediation costs are relatively manageable for most homeowners in Coal 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 Coal 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 Coal County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | TUPELO PWA | 377 | 29 |
| 2 | Coal Company Rw&swmg #6 | 150 | 29 |
| 3 | Clarita-olney Rwd | 360 | 28 |
| 4 | Coal Company Rwd #5 | 366 | 24 |
| 5 | Roundhill Rwd #4 | 219 | 24 |
11 total water systems serve Coal County.
All ZIP Codes in Coal County
6 ZIP codes tracked in Coal County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 74530 | Bromide | 99 | A | 0 | $57K |
| 2 | 74535 | Clarita | 98 | A | 4 (1 health) | $92K |
| 3 | 74572 | Tupelo | 97 | A | 5 (2 health) | $84K |
| 4 | 74556 | Lehigh | 94 | A | 6 (1 health) | $141K |
| 5 | 74534 | Centrahoma | 66 | C | 0 | $86K |
| 6 | 74538 | Coalgate | 65 | C | 24 (11 health) | $94K |
Recommended Buyer Guides for Coal 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 — 60.5% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Coal County, Oklahoma
Overview
Coal County in Oklahoma covers 6 ZIP codes with an average Home Safety Score of A (87/100).
4 of 6 ZIP codes have recorded EPA violations. 15 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.