Tillman County, Oklahoma
6 ZIP codes · Avg score 72/100 · Grade B · Updated 2026-07-19
ZipCheckup grade for Tillman: B.
This ZIP looks solid, with a few items worth a quick check.
Tillman County maintains reliable drinking water quality across all 6 of its tracked ZIP codes.
How Tillman County Compares
How Tillman County Compares
Tillman County scores 7 points below the Oklahoma state average (79/100) and 4 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-07-19
ZIP Code Risk Map
Water Quality Map: Tillman County, Oklahoma
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.1 (asthma 11.1%, diabetes 16.2%)
Estimated additional annual cost per homeowner: $1,365, driven primarily by water_infra
Infrastructure: 0.588% avg pipe failure probability, 83% of ZIPs at high risk
87% of homes built before 1978 (lead paint era)
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Tillman County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 27 violations. Past 5 years: 61 total (61 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: $1,365
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,771 housing units in Tillman 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 Tillman County
Remediation costs are relatively manageable for most homeowners in Tillman 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 Tillman County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water systems serving Tillman County
7 community water systems serving Tillman County.
- C
- C
- C
- B
- C
- B
Show all 7 water systems
- A
Systems with the most violations in Tillman County
5 water systems with recorded EPA violations.
- B
- C
- C
- C
- A
All ZIP Codes in Tillman County
6 ZIP codes tracked in Tillman County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 73551 | Hollister | 98 | A | 4 (1 health) | $76K |
| 2 | 73530 | Davidson | 75 | B | 11 (6 health) | $69K |
| 3 | 73570 | Tipton | 70 | B | 49 (30 health) | $77K |
| 4 | 73542 | Frederick | 66 | C | 8 (7 health) | $72K |
| 5 | 73555 | Manitou | 66 | C | 0 | $43K |
| 6 | 73546 | Grandfield | 55 | C | 32 (26 health) | $57K |
Recommended Buyer Guides for Tillman 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 — 87% of homes built before 1978
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for Tillman County, Oklahoma
Overview
Tillman County in Oklahoma covers 6 ZIP codes with an average Home Safety Score of B (72/100).
5 of 6 ZIP codes have recorded EPA violations. 70 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.