Alaska — At-Large
119th Congress · 274 ZIP codes · Avg score 75/100 · Grade B · Updated 2026-07-19
Data: EPA SDWIS / Census 119th Congress Last verified: 2026-07-19
ZipCheckup tracks water safety for 274 ZIP codes in Alaska's At-Large: the district earns a grade B (75/100). 14,004 EPA violations on record, 1,173 health-based.
Top Contaminants
ZIP Codes in This District
100 ZIP codes tracked in Alaska's At-Large. Showing top 50 by safety score.
| # | ZIP Code | City | Safety Score | Grade | Violations |
|---|---|---|---|---|---|
| 1 | 99505 | Jber | 99 | A | 0 |
| 2 | 99590 | Grayling | 99 | A | 0 |
| 3 | 99721 | Anaktuvuk Pass | 99 | A | 0 |
| 4 | 99747 | Kaktovik | 99 | A | 0 |
| 5 | 99553 | Akutan | 98 | A | 149 (1 health) |
| 6 | 99571 | Cold Bay | 98 | A | 3 |
| 7 | 99576 | Dillingham | 98 | A | 25 (1 health) |
| 8 | 99578 | Eek | 98 | A | 73 (1 health) |
| 9 | 99579 | Egegik | 98 | A | 4 (1 health) |
| 10 | 99602 | Holy Cross | 98 | A | 6 (1 health) |
| 11 | 99612 | King Cove | 98 | A | 6 (1 health) |
| 12 | 99615 | Kodiak | 98 | A | 10 (1 health) |
| 13 | 99619 | Kodiak | 98 | A | 10 (1 health) |
| 14 | 99624 | Larsen Bay | 98 | A | 17 (1 health) |
| 15 | 99630 | Mekoryuk | 98 | A | 12 (1 health) |
| 16 | 99636 | New Stuyahok | 98 | A | 28 (1 health) |
| 17 | 99670 | South Naknek | 98 | A | 15 (1 health) |
| 18 | 99678 | Togiak | 98 | A | 2 |
| 19 | 99697 | Kodiak | 98 | A | 10 (1 health) |
| 20 | 99749 | Kiana | 98 | A | 7 (1 health) |
| 21 | 99765 | Nulato | 98 | A | 7 (1 health) |
| 22 | 99774 | Stevens Village | 98 | A | 52 (1 health) |
| 23 | 99784 | White Mountain | 98 | A | 4 (1 health) |
| 24 | 99561 | Chefornak | 97 | A | 38 (2 health) |
| 25 | 99644 | Ouzinkie | 97 | A | 6 (2 health) |
| 26 | 99659 | Saint Michael | 97 | A | 24 (2 health) |
| 27 | 99680 | Tuntutuliak | 97 | A | 57 (2 health) |
| 28 | 99681 | Tununak | 97 | A | 82 (2 health) |
| 29 | 99781 | Venetie | 97 | A | 71 (2 health) |
| 30 | 99782 | Wainwright | 97 | A | 5 |
| 31 | 99789 | Nuiqsut | 97 | A | 5 |
| 32 | 99506 | Jber | 95 | A | 0 |
| 33 | 99609 | Kasigluk | 95 | A | 88 (2 health) |
| 34 | 99634 | Napakiak | 95 | A | 17 (1 health) |
| 35 | 99641 | Nunapitchuk | 95 | A | 21 (3 health) |
| 36 | 99773 | Shungnak | 95 | A | 47 (3 health) |
| 37 | 99785 | Brevig Mission | 95 | A | 26 (3 health) |
| 38 | 99786 | Ambler | 95 | A | 10 (3 health) |
| 39 | 99545 | Kongiganak | 94 | A | 125 (4 health) |
| 40 | 99547 | Atka | 94 | A | 30 (1 health) |
| 41 | 99552 | Akiak | 94 | A | 5 |
| 42 | 99558 | Anvik | 94 | A | 71 (1 health) |
| 43 | 99567 | Chugiak | 94 | A | 30 (1 health) |
| 44 | 99587 | Girdwood | 94 | A | 2 |
| 45 | 99608 | Karluk | 94 | A | 4 |
| 46 | 99613 | King Salmon | 94 | A | 2 |
| 47 | 99679 | Tuluksak | 94 | A | 67 (1 health) |
| 48 | 99685 | Unalaska | 94 | A | 11 |
| 49 | 99720 | Allakaket | 94 | A | 62 (1 health) |
| 50 | 99763 | Noorvik | 94 | A | 27 (4 health) |
Overview
Alaska's At-Large encompasses 274 ZIP codes tracked by ZipCheckup. The district's average Home Safety Score is B (75/100).
14004 EPA violations have been recorded across this district's water systems. 1173 are health-based violations. About 69% of tracked ZIP codes have at least one violation.
Top Contaminants
The most frequently cited water quality issues in this district:
- E. coli - 3190 violations
- Consumer Confidence Report Rule - 2673 violations
- Fecal Coliform - 1930 violations
- Revised Total Coliform Rule - 1559 violations
- Total Coliform - 916 violations
Housing Context
Homes in this district were built on average around 1985 (~41 years old). Older homes may have lead pipes or solder - consider a water filter if your home predates 1986.
Lead Alert: 2 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 274 ZIP codes in Alaska's At-Large.