Colorado — 2nd District
119th Congress · 103 ZIP codes · Avg score 59/100 · Grade C · Updated 2026-06-03
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-06-03
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in Colorado's 2nd District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 80483 | Yampa | 83 | B | 0 |
| 2 | 80428 | Clark | 79 | B | 5 |
| 3 | 80027 | Louisville | 70 | B | 0 |
| 4 | 80447 | Grand Lake | 70 | B | 0 |
| 5 | 80466 | Nederland | 70 | B | 1 |
| 6 | 80403 | Golden | 69 | C | 2 |
| 7 | 80442 | Fraser | 69 | C | 3 |
| 8 | 80443 | Frisco | 69 | C | 20 (1 health) |
| 9 | 80482 | Winter Park | 69 | C | 21 (1 health) |
| 10 | 81639 | Hayden | 69 | C | 381 |
| 11 | 80424 | Breckenridge | 68 | C | 14 (2 health) |
| 12 | 80436 | Dumont | 68 | C | 5 |
| 13 | 80467 | Oak Creek | 68 | C | 40 (12 health) |
| 14 | 80306 | Boulder | 67 | C | 17 (3 health) |
| 15 | 80308 | Boulder | 67 | C | 17 (3 health) |
| 16 | 80444 | Georgetown | 67 | C | 2 |
| 17 | 80476 | Silver Plume | 67 | C | 9 (3 health) |
| 18 | 80028 | Louisville | 66 | C | 0 |
| 19 | 80422 | Black Hawk | 66 | C | 1 |
| 20 | 80477 | Steamboat Springs | 66 | C | 141 (14 health) |
| 21 | 80478 | Tabernash | 66 | C | 0 |
| 22 | 80480 | Walden | 66 | C | 0 |
| 23 | 80544 | Niwot | 66 | C | 0 |
| 24 | 80632 | Greeley | 66 | C | 1 |
| 25 | 80633 | Greeley | 66 | C | 1 |
| 26 | 80638 | Greeley | 66 | C | 1 |
| 27 | 80639 | Greeley | 66 | C | 1 |
| 28 | 80402 | Golden | 65 | C | 2 |
| 29 | 80419 | Golden | 65 | C | 2 |
| 30 | 80438 | Empire | 65 | C | 3 |
| 31 | 80459 | Kremmling | 65 | C | 17 (1 health) |
| 32 | 80516 | Erie | 65 | C | 1 |
| 33 | 80631 | Greeley | 65 | C | 1 |
| 34 | 80634 | Greeley | 65 | C | 1 |
| 35 | 80026 | Lafayette | 64 | C | 19 (1 health) |
| 36 | 80401 | Golden | 64 | C | 2 |
| 37 | 80498 | Silverthorne | 64 | C | 6 |
| 38 | 80502 | Longmont | 64 | C | 4 |
| 39 | 80446 | Granby | 63 | C | 14 |
| 40 | 80451 | Hot Sulphur Springs | 63 | C | 6 |
| 41 | 80452 | Idaho Springs | 63 | C | 5 |
| 42 | 80481 | Ward | 63 | C | 4 |
| 43 | 80504 | Longmont | 63 | C | 4 |
| 44 | 80549 | Wellington | 63 | C | 14 (2 health) |
| 45 | 80307 | Boulder | 62 | C | 17 (3 health) |
| 46 | 80309 | Boulder | 62 | C | 17 (3 health) |
| 47 | 80310 | Boulder | 62 | C | 17 (3 health) |
| 48 | 80314 | Boulder | 62 | C | 17 (3 health) |
| 49 | 80321 | Boulder | 62 | C | 17 (3 health) |
| 50 | 80322 | Boulder | 62 | C | 17 (3 health) |
Overview
Colorado's 2nd District serving an estimated 8,874,489 residents encompasses 103 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (59/100).
1990 EPA violations have been recorded across this district's water systems. 150 are health-based violations. About 76% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Lead and Copper Rule — 331 violations
- E. coli — 249 violations
- Total Trihalomethanes (TTHM) — 187 violations
- Haloacetic Acids (HAA5) — 172 violations
- Fecal Coliform — 116 violations
Housing Context
Homes in this district were built on average around 1977 (~49 years old). Older homes may have lead pipes or solder — consider a water filter if your home predates 1986.
Data Sources
- Water quality violations: EPA Safe Drinking Water Information System (SDWIS)
- Congressional district boundaries: U.S. Census Bureau, 119th Congress
- Housing age: U.S. Census Bureau American Community Survey
Updated daily. Data covers 103 ZIP codes in Colorado's 2nd District.