Water quality for ZIP code 89404
ZIP 89404 covers Denio in Humboldt County, Nevada, one of 7 ZIP codes in the county. 28 active public water systems serve the county; 14 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Humboldt County
6 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Orovada Water District Orovada |
200 | 0 | 56.1 mi | |
| Winnemucca City of Winnemucca |
8,518 | 1 | 80.8 mi | |
| Gold Country Estates |
1,695 | 2 | 82.1 mi | |
| Star City Properties |
285 | 1 | 82.3 mi | |
| Golconda Gid Golconda |
210 | 0 | 89.8 mi | |
| Valmy Station Mobile Home Park |
96 | 3 | — |
Non-community systems in Humboldt County (21: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Denio Junction Denio Junction |
25 | 0 | 0 | |
|
P and L Denio Junction RV Park |
65 | 5 | 4 | |
|
Royal Peacock RV Park |
53 | 0 | 0 | |
|
Kings River Elementary School |
27 | 2 | 0 | |
|
Paradise Valley Elementary |
35 | 5 | 3 | |
|
Paradise Valley Park |
40 | 2 | 0 | |
|
Community Hall Paradise Valley |
72 | 0 | 0 | |
|
A1 Fuel Stop |
25 | 0 | 0 | |
|
Css Farms LLC |
50 | 0 | 0 | |
|
Diamond Plastics |
38 | 5 | 0 | |
|
Nevada Gold Mines Turquoise Ridge |
480 | 0 | 0 | |
|
Nevada Gold Mines Twin Creeks |
600 | 0 | 0 | |
|
North Valmy Power Plant |
60 | 0 | 0 | |
|
Lone Tree Mine |
25 | 0 | 0 | |
|
Valmy Chevron |
45 | 3 | 0 | |
|
Ndot Valmy Roadside Park Rp809hu |
367 | 0 | 0 | |
|
Pilot Travel Center 485 |
1,448 | 1 | 0 | |
|
Marigold Mine Potable Water System |
450 | 0 | 0 | |
|
Hycroft Resources & Development LLC |
90 | 2 | 0 | |
|
Lye Creek Campground Usfs |
25 | 1 | 0 | |
|
Virgin Valley Campground Fws |
25 | 1 | 0 |
About this data
Water systems are matched to Humboldt County, 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.
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 Nevada 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.