Denton County, Texas
30 ZIP codes · Avg score 90/100 · Grade A · Updated 2026-06-03
Within Denton County, all 30 tracked ZIP codes show above-average drinking water safety — violations are infrequent and typically minor.
How Denton County Compares
How Denton County Compares
Denton County scores 8 points above the Texas state average (82/100) and 22 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Denton County, Texas
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 10.6 (asthma 9.3%, diabetes 9.9%)
Estimated additional annual cost per homeowner: $1,063, driven primarily by flood
Infrastructure: 0.257% avg pipe failure probability
27.1% of homes built before 1978 (lead paint era)
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across Denton County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 23 violations. Past 5 years: 25 total (25 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: $1,063
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
324,827 housing units in Denton 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 Denton County
Remediation costs are relatively manageable for most homeowners in Denton 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 Denton 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 Denton County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Denton | 150,037 | 57 |
| 2 | City of Lewisville | 140,880 | 42 |
| 3 | Town of Flower Mound | 80,000 | 41 |
| 4 | South Fork Mobile Home Park | 1,050 | 39 |
| 5 | Beach and Tennis Club Hoa | 25 | 37 |
54 total water systems serve Denton County.
All ZIP Codes in Denton County
30 ZIP codes tracked in Denton County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 75027 | Flower Mound | 98 | A | 5 (1 health) | — |
| 2 | 76203 | Denton | 98 | A | 3 | — |
| 3 | 76206 | Denton | 98 | A | 3 | — |
| 4 | 75010 | Carrollton | 95 | A | 0 | $435K |
| 5 | 75056 | The Colony | 95 | A | 1 | $415K |
| 6 | 76249 | Krum | 95 | A | 1 | $304K |
| 7 | 75029 | Lewisville | 94 | A | 9 (1 health) | — |
| 8 | 75287 | Dallas | 94 | A | 3 | $389K |
| 9 | 76202 | Denton | 94 | A | 3 | — |
| 10 | 76204 | Denton | 94 | A | 3 | — |
| 11 | 76258 | Pilot Point | 94 | A | 4 (1 health) | $320K |
| 12 | 75057 | Lewisville | 91 | A | 9 (1 health) | $209K |
| 13 | 75007 | Carrollton | 90 | A | 0 | $360K |
| 14 | 75022 | Flower Mound | 89 | A | 5 (1 health) | $618K |
| 15 | 75028 | Flower Mound | 89 | A | 5 (1 health) | $458K |
| 16 | 76205 | Denton | 89 | A | 3 | $308K |
| 17 | 76207 | Denton | 89 | A | 3 | $361K |
| 18 | 76208 | Denton | 89 | A | 3 | $358K |
| 19 | 76210 | Denton | 89 | A | 3 | $348K |
| 20 | 76227 | Aubrey | 89 | A | 6 | $376K |
| 21 | 75067 | Lewisville | 86 | A | 9 (1 health) | $321K |
| 22 | 75068 | Little Elm | 86 | A | 7 (1 health) | $386K |
| 23 | 76259 | Ponder | 86 | A | 3 | $357K |
| 24 | 76266 | Sanger | 86 | A | 9 | $316K |
| 25 | 76262 | Roanoke | 85 | A | 0 | $527K |
| 26 | 76201 | Denton | 84 | B | 3 | $250K |
| 27 | 76209 | Denton | 84 | B | 3 | $249K |
| 28 | 76226 | Argyle | 83 | B | 8 | $555K |
| 29 | 76247 | Justin | 82 | B | 5 | $373K |
| 30 | 75077 | Lewisville | 81 | B | 9 (1 health) | $419K |
Recommended Buyer Guides for Denton 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 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 Denton County, Texas
Overview
Denton County in Texas covers 30 ZIP codes with an average Home Safety Score of A (90/100).
27 of 30 ZIP codes have recorded EPA violations. 9 health-based violations have been documented.
← Back to Texas 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.