Water quality for ZIP code 99121
ZIP 99121 covers Danville in Ferry County, Washington, one of 9 ZIP codes in the county. 33 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 Ferry County
10 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Orient Water Company |
167 | 4 | 13.1 mi | |
| Curlew Kai Homeowner Water System |
133 | 1 | 17.4 mi | |
| Curlew Conservation Center |
349 | 2 | 22.1 mi | |
| Republic City of |
1,673 | 1 | 23.2 mi | |
| Lakeside Park |
180 | 2 | 26.5 mi | |
| Riverwood Water System |
43 | 0 | 28.2 mi | |
| Martin Creek Community Assn |
109 | 1 | 37.8 mi | |
| North Twin Lakeview Assn |
88 | 0 | 44.6 mi | |
| Inchelium Water District |
540 | 0 | 45.9 mi | |
| Fourth of July Creek Estates |
29 | 0 | — |
Non-community systems in Ferry County (22: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Danville Outpost |
87 | 1 | 0 | |
|
US Border Station Danville |
171 | 1 | 0 | |
|
K2 Mine |
25 | 0 | 0 | |
|
US Border Station Laurier |
99 | 0 | 0 | |
|
Park Addition Water Association |
11 | 0 | 0 | |
|
Tiffanys Resort |
70 | 0 | 0 | |
|
Fishermans Cove |
19 | 0 | 0 | |
|
Black Beach Resort |
81 | 1 | 0 | |
|
Curlew Lake State Park |
779 | 0 | 0 | |
|
Key Mill Facility |
65 | 0 | 0 | |
|
Kpm Water System |
12 | 1 | 0 | |
|
Watering Hole, the |
29 | 0 | 0 | |
|
Ferry County Fairgrounds |
227 | 1 | 0 | |
|
North Lake RV Park |
17 | 0 | 0 | |
|
Carr Group |
11 | 1 | 0 | |
|
Columbia Cedar |
70 | 0 | 0 | |
|
Swan Lake Campground |
44 | 0 | 0 | |
|
Hartmans Log Cabin Resort INC |
397 | 1 | 0 | |
|
Torboy Industrial Park |
66 | 0 | 0 | |
|
Salishan Water System |
43 | 0 | 0 | |
|
Trailside Good Eats & Gifts |
27 | 0 | 0 | |
|
Curlew Lake Heights Water System |
22 | 1 | 0 |
About this data
Water systems are matched to Ferry 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 Washington 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.