Thornton, CO: 8 Violations - Home Safety 47/100
1 ZIP code · 2 water systems · Updated
ZipCheckup grade for Thornton: D.
Federal records show several conditions worth reviewing.
Your top priority: see the breakdown below and consider a certified water filter. NSF certified filters →
If you live in Thornton, CO, the lower-tier grade here is a signal to check the water system that serves your address and, if you have concerns, to test your own tap.
How Thornton Compares
Data: EPA SDWIS
Key Facts for Thornton Residents
- Your city's water systems recorded 8 violations since 2021.
- Average of reported 90th-percentile lead results: 0.0023 mg/L.
- Homes built before 1986: 18% - older plumbing may contain lead solder.
- Estimated remediation: $500 per household.
- Health risk index (ZipCheckup composite of CDC data): 10.98.
Thornton's Water Providers
The 2 largest of 2 systems connected with Thornton, CO are listed below.
- D
- D
Overview
We track home safety data for 1 ZIP code in Thornton, Colorado (population ~33,393), covering 2 community water systems serving approximately 275,392 people region-wide. The EPA snapshots used for this build directly map water systems to 1 of 1 ZIP codes.
1 of 1 ZIP code with a reported violation count in the available EPA record (100%) have recorded EPA violations. The available record reports no health-based violations for this measured scope.
Home Safety Score
Average Home Safety Score for Thornton: D (47/100)
Model 4.0.0 uses four measured components across three equally weighted domains. If a required domain is unavailable, no score is published:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| PFAS MCL Screen | UCMR 5 testing against the covered federal MCLs |
| Radon Risk | EPA radon zone classification |
| Annual AQI | EPA AirData county-year median with at least 90 observed days |
Water Sources
Thornton water systems draw from: Surface water.
Lead & Copper
- Average of reported 90th-percentile lead results: 0.0023 mg/L (EPA action level: 0.015 mg/L)
- 0 of 1 ZIP code with known status exceed the EPA lead action level
Radon Risk
1 of 1 ZIP records with known zones is in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
Top Contaminants
| Contaminant | Category | Violations | ZIPs Affected |
|---|---|---|---|
| Interim Enhanced Surface Water Treatment Rule | Treatment Technique | 8 | 1 |
| Gross Alpha (excl. radon and uranium) | Radionuclides | 2 | 1 |
| Combined Uranium | Radionuclides | 2 | 1 |
| Combined Radium (-226 and -228) | Radionuclides | 2 | 1 |
| Lead and Copper Rule | Treatment Technique | 2 | 1 |
Areas with Most Violations
| ZIP Code | Safety Score | Violations | Health-Based | System |
|---|---|---|---|---|
| 80241 | D | 8 | 0 | City of Thornton |
All ZIP Codes in Thornton
- 80241 [D] - 8 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
Reporting periods vary by source. Missing data is shown as unavailable, not as zero.
Thornton Community Health Snapshot
Source: CDC PLACES (County-level estimates). County health indicators are shown for context only and are not linked to this area's water records.
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
Housing age data helps assess potential lead pipe and infrastructure risks. Newer housing stock generally means lower plumbing-related contamination risk.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
For Thornton, the median build year stands at 1995; the figures below show the share of homes from each era.
Most homes in Thornton were built after 1986; lead exposure at a tap still depends on its service line and plumbing. Older homes should still be tested.
Source: U.S. Census Bureau ACS B25034.
How Remediation Costs Compare in Thornton
Relative to home values, Thornton remediation estimates run low.
Estimated remediation costs in Thornton can be compared with local home values. The $300–$800 estimated range can be set against the median property value; actual costs vary by home. Home values are 11% above the Colorado average.
Thornton: Lead Risk & Vulnerable Populations
Why children are most at risk: The CDC states that no safe blood lead level in children has been identified. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.
Homes built before 1986 are more likely to have lead pipes, fixtures or solder, and census figures put that share of Thornton housing at about 18%. The lead figure used here, an average of ZIP-level 90th-percentile results, sits under 0.010 mg/L. Neither number shows what flows from a particular family's faucet; a test of that faucet is the only direct measure.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Thornton: NFIP Claim Records and Water-Quality Context
Historical NFIP data for Thornton contains 1 flood insurance claim. Among ZIP codes with claim records, 0% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.
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. The $500 remediation estimate shown here excludes flood insurance and is not derived from NFIP claim count.
Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.
Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.
What You Can Do in Thornton
- Test your water at home. City-level data shows averages - your tap may differ. Check the certification, price and turnaround time of any water test kit or lab service.
- Install a certified water filter. For Interim Enhanced Surface Water Treatment Rule, listed in the water-quality records for Thornton: if it is a rule or reporting requirement rather than a contaminant, ask your utility what the record involved; for bacteria, follow any boil-water notice from your utility; for a specific chemical contaminant, check whether a filter is certified to reduce it. Not every contaminant has a consumer filter certification.
- Check your home's plumbing. Homes built before 1986 may have lead solder in pipes. A licensed plumber can assess your risk.
- Review your water system's CCR. If you use a community water system, request its annual Consumer Confidence Report for system-level test results or find it online.
Deep Dive Reports
Detailed analysis for Thornton, CO