Idaho — 1st District
119th Congress · 134 ZIP codes · Avg score 62/100 · 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 Idaho's 1st District. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 83523 | Craigmont | 99 | A | 0 |
| 2 | 83540 | Lapwai | 99 | A | 0 |
| 3 | 83543 | Nezperce | 99 | A | 0 |
| 4 | 83555 | Winchester | 98 | A | 2 |
| 5 | 83501 | Lewiston | 94 | A | 9 (1 health) |
| 6 | 83548 | Reubens | 94 | A | 9 (4 health) |
| 7 | 83617 | Emmett | 94 | A | 3 (1 health) |
| 8 | 83524 | Culdesac | 91 | A | 5 |
| 9 | 83545 | Peck | 91 | A | 2 |
| 10 | 83654 | New Meadows | 89 | A | 3 |
| 11 | 83610 | Cambridge | 88 | A | 7 |
| 12 | 83612 | Council | 87 | A | 0 |
| 13 | 83638 | Mccall | 83 | B | 21 (6 health) |
| 14 | 83650 | Murphy | 83 | B | 0 |
| 15 | 83676 | Wilder | 83 | B | 0 |
| 16 | 83604 | Bruneau | 82 | B | 2 (1 health) |
| 17 | 83626 | Greenleaf | 81 | B | 1 |
| 18 | 83641 | Melba | 80 | B | 4 |
| 19 | 83624 | Grand View | 79 | B | 13 (1 health) |
| 20 | 83639 | Marsing | 79 | B | 21 (3 health) |
| 21 | 83656 | Notus | 77 | B | 3 |
| 22 | 83669 | Star | 77 | B | 2 |
| 23 | 83634 | Kuna | 76 | B | 2 |
| 24 | 83661 | Payette | 76 | B | 1 |
| 25 | 83644 | Middleton | 74 | B | 6 (1 health) |
| 26 | 83645 | Midvale | 73 | B | 0 |
| 27 | 83537 | Kendrick | 70 | B | 0 |
| 28 | 83672 | Weiser | 70 | B | 6 |
| 29 | 83815 | Coeur D Alene | 70 | B | 0 |
| 30 | 83816 | Coeur D Alene | 70 | B | 0 |
| 31 | 83852 | Ponderay | 70 | B | 0 |
| 32 | 83877 | Post Falls | 70 | B | 0 |
| 33 | 83651 | Nampa | 69 | C | 10 |
| 34 | 83660 | Parma | 69 | C | 8 |
| 35 | 83686 | Nampa | 69 | C | 10 |
| 36 | 83687 | Nampa | 69 | C | 10 |
| 37 | 83825 | Dover | 69 | C | 2 (1 health) |
| 38 | 83855 | Potlatch | 69 | C | 4 (1 health) |
| 39 | 83530 | Grangeville | 68 | C | 1 |
| 40 | 83616 | Eagle | 68 | C | 5 |
| 41 | 83803 | Bayview | 68 | C | 1 |
| 42 | 83642 | Meridian | 67 | C | 17 (4 health) |
| 43 | 83646 | Meridian | 67 | C | 17 (4 health) |
| 44 | 83655 | New Plymouth | 67 | C | 11 (4 health) |
| 45 | 83539 | Kooskia | 66 | C | 1 |
| 46 | 83552 | Stites | 66 | C | 3 |
| 47 | 83553 | Weippe | 66 | C | 0 |
| 48 | 83554 | White Bird | 66 | C | 0 |
| 49 | 83635 | Lake Fork | 66 | C | 0 |
| 50 | 83636 | Letha | 66 | C | 0 |
Overview
Idaho's 1st District serving an estimated 1,983,818 residents encompasses 134 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is C (62/100).
821 EPA violations have been recorded across this district's water systems. 80 are health-based violations. About 64% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- Stage 1 DBP Rule — 139 violations
- Consumer Confidence Report Rule — 128 violations
- Revised Total Coliform Rule — 126 violations
- Lead — 47 violations
- Total Trihalomethanes (TTHM) — 42 violations
Housing Context
Homes in this district were built on average around 1982 (~44 years old). Older homes may have lead pipes or solder — consider a water filter if your home predates 1986.
Lead Alert: 5 ZIP codes in this district exceed the EPA action level for lead. Consider using a certified lead-removal filter.
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 134 ZIP codes in Idaho's 1st District.