Boulder, CO Home Safety by Neighborhood - Water Issues Recorded
16 ZIP codes · 110 EPA violations on record for mapped water systems
Data source: ZipCheckup Home Safety Score registry; EPA SDWIS; EPA radon; EPA AirNow
ZipCheckup compares 16 ZIP codes across Boulder, CO. The area averages a grade C (60/100); water systems associated with 6 ZIP codes have recorded EPA violations.
Home-safety conditions vary across Boulder, CO. We compared 16 ZIP codes using the current versioned Home Safety Score. Water compliance remains one component alongside PFAS screening, radon, and annual air quality.
City Overview: Grade C (60/100)
| Grade | Neighborhoods | % |
|---|---|---|
| A | 0 | 0% |
| B | 0 | 0% |
| C | 4 | 80% |
| D | 1 | 20% |
| F | 0 | 0% |
Neighborhood Rankings
Mapped ZIP codes in Boulder ranked by Home Safety Score:
| Rank | ZIP Code | Score | Grade | Violations | Lead Risk |
|---|---|---|---|---|---|
| 1 | 80302 | 66 | C | 3 | 0.0020 mg/L |
| 2 | 80304 | 66 | C | 3 | 0.0020 mg/L |
| 3 | 80303 | 60 | C | 17 | 0.0020 mg/L |
| 4 | 80305 | 57 | C | 19 | 0.0020 mg/L |
| 5 | 80301 | 50 | D | 82 | 0.0026 mg/L |
| 6 | 80306 | — | — | — | No data |
| 7 | 80307 | — | — | — | No data |
| 8 | 80308 | — | — | — | No data |
| 9 | 80309 | — | — | — | No data |
| 10 | 80310 | — | — | 2 | 0.0020 mg/L |
| 11 | 80314 | — | — | — | No data |
| 12 | 80321 | — | — | — | No data |
| 13 | 80322 | — | — | — | No data |
| 14 | 80323 | — | — | — | No data |
| 15 | 80328 | — | — | — | No data |
| 16 | 80329 | — | — | — | No data |
How Neighborhoods Compare
Each ZIP code compared to county and state averages:
- 3 neighborhoods score better than county average
- 2 neighborhoods score worse than county average
EPA Violations
- 110 total violations since 2021 across the water systems mapped to Boulder ZIP codes (each system counted once; includes small systems beyond the city utility)
- 18 health-based violation records in the available EPA data
- 6 of 6 directly mapped ZIP records are mapped to water systems with recorded violations
- 0 of 6 ZIP records with known lead status are served by a system whose 90th-percentile lead result exceeded the EPA action level
Top Contaminants
| Contaminant | Violations | ZIPs |
|---|---|---|
| Surface Water Treatment Rule | 39 | 6 |
| Interim Enhanced Surface Water Treatment Rule | 24 | 6 |
| Public Notice Rule | 10 | 1 |
| Haloacetic Acids (HAA5) | 7 | 2 |
| Total Trihalomethanes (TTHM) | 7 | 2 |
Frequently Asked Questions
Which ZIP code in Boulder has the highest home safety score?
ZIP code 80302 has the highest safety score among scored ZIP codes in Boulder at 66/100 (grade C). Check the full report for details.
Is Boulder water safe to drink?
The Home Safety Score is not a drinking-water grade. Across 6 directly mapped ZIP records, 110 EPA violations are recorded; 0 of 6 records with known lead status exceed the action level. Check the specific ZIP and serving system before drawing a property-level conclusion.
Related Pages
Data Sources
- EPA SDWIS
- U.S. Census Bureau
Reporting periods vary by source; the page metadata identifies this materialization.