Water quality for ZIP code 99691
ZIP 99691 covers Nikolai 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 |
|---|---|---|---|---|
| Takotna Water System Takotna |
70 | 7 | 86.0 mi | |
| Ruby Water System Ruby |
215 | 6 | 147.6 mi | |
| Too'gha INC in Tanana Tanana |
271 | 9 | 167.6 mi | |
| Galena Wtp1 City Galena |
490 | 5 | 170.1 mi | |
| Galena Wtp2 Gila Galena |
290 | 4 | 171.5 mi | |
| Manley Community Water System Manley Hot Springs |
95 | 2 | 172.7 mi | |
| Nenana Municipal Water Nenana |
486 | 1 | 177.8 mi | |
| Koyukuk Safewater Facility Koyukuk |
85 | 6 | 194.2 mi | |
| Kaltag Public Water System Kaltag |
214 | 4 | 194.8 mi | |
| Shageluk Water System Shageluk |
60 | 8 | 195.1 mi | |
| Nulato River Well Nulato |
245 | 4 | 195.5 mi | |
| Minto Community Water System Minto |
205 | 10 | 201.9 mi | |
| Holy Cross Water System Holy Cross |
182 | 3 | 208.4 mi | |
| Rampart Washeteria Rampart |
88 | 7 | 209.1 mi | |
| Grayling Water System Grayling |
207 | 13 | 210.8 mi | |
| Anvik Water System Anvik |
96 | 8 | 216.9 mi | |
| Hughes Public Water Supply Hughes |
107 | 9 | 224.6 mi | |
| Stevens Village Water System Stevens Village |
28 | 6 | 255.8 mi | |
| Allakaket Public Water System Allakaket |
135 | 7 | 259.2 mi | |
| Beaver Water System Beaver |
80 | 6 | 301.9 mi | |
| Huslia Public Water System Huslia |
323 | 4 | 315.1 mi | |
| Circle Washeteria Circle |
110 | 6 | 347.0 mi | |
| Ft. Yukon Public Water System Fort Yukon |
665 | 6 | 352.7 mi | |
| Venetie Water System Venetie |
181 | 7 | 355.0 mi | |
| Chalkyitsik Village Water Chalkyitsik |
76 | 7 | 388.2 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 |
|---|---|---|---|---|
|
Yksd Merreline Kangas / Ruby Ruby |
40 | 3 | 1 | |
|
Monroes Monderosa Nenana |
78 | 1 | 0 | |
|
Yksd Allakaket School Allakaket |
52 | 6 | 0 | |
|
Blm Arctic Interagency Visitor Center Coldfoot |
130 | 0 | 0 | |
|
Coldfoot Cafe Coldfoot |
120 | 0 | 0 | |
|
The Inn at Coldfoot Coldfoot |
120 | 0 | 0 | |
|
Yukon River Camp Coldfoot |
59 | 0 | 0 |
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.