Water quality for ZIP code 99788
ZIP 99788 covers Chalkyitsik in Yukon-Koyukuk Census Area, Alaska, one of 32 ZIP codes in the county. 34 active public water systems serve the county; 30 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Yukon-Koyukuk Census Area
26 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Ft. Yukon Public Water System Fort Yukon |
665 | 6 | 40.3 mi | |
| Circle Washeteria Circle |
110 | 6 | 57.3 mi | |
| Venetie Water System Venetie |
181 | 7 | 74.9 mi | |
| Beaver Water System Beaver |
80 | 6 | 101.3 mi | |
| Arctic Village Water System Arctic Village |
175 | 8 | 113.3 mi | |
| Stevens Village Water System Stevens Village |
28 | 6 | 152.8 mi | |
| Minto Community Water System Minto |
205 | 10 | 187.9 mi | |
| Rampart Washeteria Rampart |
88 | 7 | 195.4 mi | |
| Nenana Municipal Water Nenana |
486 | 1 | 209.1 mi | |
| Manley Community Water System Manley Hot Springs |
95 | 2 | 224.0 mi | |
| Huslia Public Water System Huslia |
323 | 4 | 226.3 mi | |
| Allakaket Public Water System Allakaket |
135 | 7 | 243.1 mi | |
| Too'gha INC in Tanana Tanana |
271 | 9 | 254.1 mi | |
| Hughes Public Water Supply Hughes |
107 | 9 | 292.8 mi | |
| Ruby Water System Ruby |
215 | 6 | 356.9 mi | |
| Galena Wtp1 City Galena |
490 | 5 | 393.7 mi | |
| Galena Wtp2 Gila Galena |
290 | 4 | 395.7 mi | |
| Koyukuk Safewater Facility Koyukuk |
85 | 6 | 412.1 mi | |
| Nulato River Well Nulato |
245 | 4 | 427.5 mi | |
| McGrath Water System Mcgrath |
341 | 5 | 429.6 mi | |
| Takotna Water System Takotna |
70 | 7 | 440.1 mi | |
| Kaltag Public Water System Kaltag |
214 | 4 | 455.9 mi | |
| Shageluk Water System Shageluk |
60 | 8 | 539.0 mi | |
| Grayling Water System Grayling |
207 | 13 | 542.0 mi | |
| Anvik Water System Anvik |
96 | 8 | 557.0 mi |
Non-community systems in Yukon-Koyukuk Census Area (7: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Coldfoot Cafe Coldfoot |
120 | 0 | 0 | |
|
The Inn at Coldfoot Coldfoot |
120 | 0 | 0 | |
|
Yukon River Camp Coldfoot |
59 | 0 | 0 | |
|
Blm Arctic Interagency Visitor Center Coldfoot |
130 | 0 | 0 | |
|
Monroes Monderosa Nenana |
78 | 1 | 0 | |
|
Yksd Allakaket School Allakaket |
52 | 6 | 0 | |
|
Yksd Merreline Kangas / Ruby Ruby |
40 | 3 | 1 |
About this data
Water systems are matched to Yukon-Koyukuk Census Area, the county this ZIP code lies in, nearest to the ZIP code's centre first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system or, for systems without one, to the centre of the first town EPA lists the system as serving, from Census Bureau place files.
ZIP code areas and town boundaries come from the U.S. Census Bureau's 2020 ZCTA files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Alaska records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.