Thornton, TX: 2 Violations - 87/100 (2026)
1 ZIP code · 3 water systems · Updated 2026-07-19
ZipCheckup grade for Thornton: A.
No federal data flags a major home-safety concern for this ZIP.
Across Thornton, EPA monitoring data shows low violation rates and healthy safety margins - a pattern that places the city well above TX's average for drinking water compliance across recent reporting cycles.
How Thornton Compares
Data: EPA SDWIS Last verified: 2026-07-19
Key Facts for Thornton Residents
- Your city's water systems recorded 2 violations in the past 5 years.
- Homes built before 1986: 43% - older plumbing may contain lead solder.
- CDC health risk index: 15.24 - above typical levels.
Thornton's Water Providers
3 water systems are tracked federally in Thornton, TX. The top 3 providers collectively serve most residential addresses, but because they operate independently, infrastructure maintenance standards and compliance histories differ from one service zone to another.
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Overview
We track water quality and home safety data for 1 ZIP code in Thornton, Texas (population ~1,875), covering 3 community water systems serving approximately 2,842 people region-wide.
1 of 1 ZIP code (100%) have recorded EPA violations. All violations are monitoring/reporting type.
Home Safety Score
Average Home Safety Score for Thornton: A (87/100)
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
Thornton water systems draw from: Groundwater.
Lead & Copper
- Lead data: not yet available for Thornton
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Surface Water Treatment Rule | Treatment Technique | 4 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 76687 | A | 2 | 0 | Slc Water Supply Corporation |
All ZIP Codes in Thornton
- 76687 [A] - 2 violations
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.
Thornton Community Health Snapshot
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
What's in Thornton's Water?
Based on EPA violation records. Check your ZIP code report for system-specific contaminant data.
Thornton Infrastructure Age
With 43% 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
Some cities skew heavily toward one construction era; Thornton does not. The median build year of 1981 reflects a housing stock where older and newer homes share the market in meaningful proportions. That mixed profile means the city carries moderate aggregate plumbing-era risk - with older homes, particularly those built before 1986, representing the portion of the stock where lead-soldered joints may still be present.
Most homes in Thornton were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
Thornton: Lead Risk & Vulnerable Populations
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.
If 43% of the Thornton inventory comes from before the federal ban on lead-bearing solder - and if utility samples sit at or near 0.015 mg/L - the gap between citywide averages and one specific faucet becomes a practical concern rather than a theoretical one. That is why one-home reads exist as a separate measurement. A certified filter through retailer networks addresses confirmed exposure where it appears in a household.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Thornton, TX