Water quality for ZIP code 99128
ZIP 99128 covers Farmington in Whitman County, Washington, one of 20 ZIP codes in the county. 34 active public water systems serve the county; 16 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in Whitman County
18 systems, nearest first| System | Serves | Status | Rules violated, 3 yr | Distance |
|---|---|---|---|---|
| Garfield Water Department |
694 | 4 | 6.7 mi | |
| Oakesdale Town of |
492 | 0 | 8.0 mi | |
| Tekoa City of |
1,076 | 2 | 8.8 mi | |
| Palouse Water Dept City of |
1,298 | 0 | 12.9 mi | |
| Rosalia Town of |
831 | 0 | 16.6 mi | |
| Colfax Water Department City of |
3,507 | 2 | 18.1 mi | |
| Malden Water Dept |
215 | 0 | 20.5 mi | |
| Albion Water Dept |
600 | 1 | 22.6 mi | |
| Steptoe Water/sewer District |
210 | 2 | 23.1 mi | |
| Sunset Mobile Court |
51 | 0 | 23.7 mi | |
| ST John Town of |
800 | 2 | 23.7 mi | |
| Washington State University |
21,506 | 0 | 25.4 mi | |
| Pullman Water Department City of |
31,315 | 3 | 25.5 mi | |
| Endicott Water Dept |
488 | 1 | 30.8 mi | |
| Colton Water Department |
632 | 1 | 36.7 mi | |
| Uniontown Water Works |
366 | 0 | 38.8 mi | |
| Lamont Water System |
136 | 0 | 39.4 mi | |
| Lacrosse Town of |
297 | 2 | 42.5 mi |
Non-community systems in Whitman County (15: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Horn School Rest Area |
557 | 1 | 0 | |
|
Kamiak Butte County Park |
201 | 1 | 0 | |
|
Colfax Lds Church |
35 | 0 | 0 | |
|
Palouse Empire Fairgrounds |
733 | 1 | 0 | |
|
Schad Holdings |
29 | 0 | 0 | |
|
Garrison Center |
60 | 0 | 0 | |
|
Klemgard County Park |
157 | 0 | 0 | |
|
Tula Young Hastings Farm Wsu |
40 | 2 | 0 | |
|
Onecho Bible Church |
49 | 0 | 0 | |
|
Boyer Park & Marina |
37 | 1 | 0 | |
|
Wawawai County Park |
154 | 0 | 0 | |
|
Wilma Port of |
108 | 0 | 0 | |
|
Evangelical Free Church |
404 | 0 | 0 | |
|
Project Cougar |
283 | 3 | 1 | |
|
Toyota of Pullman |
53 | 0 | 0 |
About this data
Water systems are matched to Whitman 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.