Duncanville, TX Water Safety: 92/100 (2026)
3 ZIP codes · 2 water systems · Updated 2026-06-04
Residents of Duncanville generally live with tap water that beats the TX safety average on key EPA compliance metrics.
How Duncanville Compares
Data: EPA SDWIS Last verified: 2026-06-04
What You Should Know About Duncanville Water
- Average lead level: 0.0011 mg/L.
- Homes built before 1986: 75% — older plumbing may contain lead solder.
- Estimated remediation: $1,400 per household.
- CDC health risk index: 11.84.
Who Supplies Your Water in Duncanville
2 independent water providers serve Duncanville, TX — 2 systems appear in federal records.
Overview
We track water quality and home safety data for 3 ZIP codes in Duncanville, Texas (population ~39,778), covering 2 community water systems serving approximately 90,317 people region-wide.
No EPA violations recorded across any ZIP codes in Duncanville — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Duncanville: A (92/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Duncanville water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0011 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
- Zone 1 (High): 0 ZIP codes
- Zone 2 (Moderate): 0 ZIP codes
- Zone 3 (Low): 3 ZIP codes
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 75116 | A | City of Duncanville | 39,413 |
| 75137 | A | City of Duncanville | 39,413 |
| 75138 | A | City of Duncanville | 39,413 |
All ZIP Codes in Duncanville
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
Health Outcomes in Duncanville
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
Housing & Infrastructure in Duncanville
With 75% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Heavily weighted toward older construction, Duncanville's housing stock carries a median build year of 1982. That profile puts a majority of homes in the era when lead-soldered copper plumbing was standard practice.
Over half of homes in Duncanville were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Cost Context: What Remediation Means for Duncanville Homeowners
Across Duncanville, the equity share taken up by estimated remediation is small — a favorable ratio for most property owners.
Remediation costs in Duncanville are relatively low compared to home values. The $933–$2,067 estimated range is a small fraction of median property value. Home values are 14% above the Texas average.
Lead Exposure Risk for Children in Duncanville
Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Older stock in Duncanville represents 75% of the inventory, and citywide monitoring runs at or above the federal action level — making an in-home read a standard household-level step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Flood & Climate Risk in Duncanville
Within the NFIP's national dataset, Duncanville falls in moderate-exposure territory — 92 documented incidents spanning multiple decades, with 67% of local ZIP codes sitting inside FEMA flood boundaries. That combination warrants inclusion in any thorough local water quality review.
Duncanville has a moderate flood history with 92 FEMA claims averaging $5,875 per payout. 67% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure. Flood damage can add significantly to the estimated <strong>$1,400</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Duncanville, TX