Custer County, Oklahoma
7 ZIP codes · Avg score 82/100 · Grade B · Updated 2026-06-03
EPA monitoring reports for Custer County cover 7 ZIP codes and tell a largely reassuring story — compliance rates are high and health-based violations are far below the national norm.
How Custer County Compares
How Custer County Compares
Custer County scores 3 points above the Oklahoma state average (79/100) and 14 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Custer County, Oklahoma
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 13.8 (asthma 11.1%, diabetes 12%)
Estimated additional annual cost per homeowner: $690, driven primarily by energy_code_gap
Infrastructure: 0.433% avg pipe failure probability, 86% of ZIPs at high risk
70.4% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Custer County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 14 violations. Past 5 years: 25 total (25 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
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $690
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
12,909 housing units in Custer 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 Custer County
Remediation costs are relatively manageable for most homeowners in Custer 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 Custer 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 Custer County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Custer County Rwd #3 | 960 | 76 |
| 2 | Washita Company Rwd #2 | 1,032 | 48 |
| 3 | Frontier Development Authority | 437 | 42 |
| 4 | Weatherford | 10,833 | 34 |
| 5 | Country East Mhp | 97 | 34 |
12 total water systems serve Custer County.
All ZIP Codes in Custer County
7 ZIP codes tracked in Custer County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 73669 | Thomas | 95 | A | 0 | $147K |
| 2 | 73639 | Custer City | 89 | A | 3 (1 health) | $108K |
| 3 | 73620 | Arapaho | 84 | B | 9 | $161K |
| 4 | 73096 | Weatherford | 83 | B | 34 (1 health) | $243K |
| 5 | 73625 | Butler | 83 | B | 16 (1 health) | $99K |
| 6 | 73601 | Clinton | 75 | B | 14 (5 health) | $118K |
| 7 | 73646 | Fay | 66 | C | 0 | $133K |
Recommended Buyer Guides for Custer County
Methodologically, the recommendation order reflects severity in the federal record: contaminants flagged in EPA detection records for this county outrank generic water concerns, FEMA-confirmed hazard ratings shift emergency-related categories upward, and CDC lead-exposure markers govern when lead-test kits and certified filters appear at the top of the list.
- Best Lead Paint Test Kits — 70.4% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Custer County, Oklahoma
Overview
Custer County in Oklahoma covers 7 ZIP codes with an average Home Safety Score of B (82/100).
5 of 7 ZIP codes have recorded EPA violations. 8 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.