Tapcensus

Water quality in Winthrop, Washington

Winthrop is in Okanogan County. 123 active public water systems serve the county; 46 had an EPA violation in the past three years.

Most likely your provider

Winthrop Town of WA5397750 · Community water system · Ground water
Serves 1,350 people Rules violated, past 3 years 4 Last sanitary survey Oct 26, 2022 Distance under 0.1 mi

Your location is within the outer bounds of this system's EPA service area.

View system details EPA facility report

Other community water systems in Okanogan County

42 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Pine Forest Water System
 90 0 3.9 mi
Twisp Town of
 1,173 0 8.0 mi
Edelweiss Maintenance Commission
 95 2 9.5 mi
Wolf Creek Property Owners Assn
 71 1 14.5 mi
Lost River Airport Association
 76 0 19.2 mi
Methow Water System INC
 45 0 19.2 mi
Johnson Creek Water Users Assn
 48 0 20.5 mi
Jaw Farms INC
 636 0 23.2 mi
M J Trailer Ranch
 100 0 26.6 mi
Progressive Flat Water Assn
 335 0 28.3 mi
Emanuel Heights Water System
 60 2 28.4 mi
Okanogan Water Department City of
 3,817 1 28.4 mi
Sandflat Water Association
 260 0 29.7 mi
Duck Lake Water Association
 635 0 29.8 mi
Coleman Butte Water Assn
 250 0 30.3 mi
Omak City of
 4,940 0 30.7 mi
Riverside Town of
 429 5 30.8 mi
Brewster Flat Domestic Water Assn
 542 0 31.2 mi
Pinecrest Subdivison Owners
 63 0 31.3 mi
Brewster City of
 3,843 1 31.4 mi
Suncrest Plat Water System
 260 0 31.5 mi
Crumbacher Estates Water System
 111 0 31.7 mi
Aston Estates
 141 0 31.9 mi
Pateros Water Department
 1,149 1 32.1 mi
Vista Vue Water Users Assn
 60 0 32.2 mi
All 43 community water systems in Okanogan County
Non-community systems in Okanogan County (80: schools, campgrounds, workplaces, restaurants)

These systems serve places you visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Winthrop KOA
 77 2 0
Rader Road HOA
 44 0 0
Silverline Resort
 26 1 0
Pearrygin Lake State Park Both CG
 2,103 1 0
Liberty Bell High School
 642 0 0
Bear Creek Golf Course
 68 1 0
Sun Mountain Resort
 376 2 0
Ncsb
 71 1 0
Riverbend RV Park
 222 0 0
Twisp River Sky Ranch Water System
 21 0 0
Wesola Polana
 31 1 0
Liberty Woodlands
 14 0 0
Pasayten Peak
 129 1 0
Loup Loup Ski Area
 350 1 0
Mazama Store
 109 1 0
Wilson Ranch PD Water System
 82 0 0
Early Winters Cabins
 17 0 0
Early Winters WC Methow RD
 54 1 0
Klipchuck CG Methow RD
 149 1 0
Shady Pines Resort
 62 0 0
Jacks RV Park 1
 24 0 0
Sit N Bull Saloon
 76 1 0
Liars Cove
 73 1 0
Conconully SP Primitive Area
 129 0 0
Red Rock Saloon
 100 0 0
Lazy Daze Water Association
 21 0 0
Conconully Bible Camp
 71 1 0
Conconully City Well
 299 0 0
Washington Pass Well Methow RD
 413 0 0
Conconully SP Boat Launch
 258 0 0
Emerald City Green Machine
 155 0 0
Wagon Wheel Bar & Grill
 26 1 0
Roadway Stores INC
 27 0 0
Our Lady of Valley Catholic Church
 60 2 0
Okanogan County Fair Water System
 867 2 0
Poirier Orchard
 50 0 0
Alamo Orchard CO Pateros
 48 2 0
Indian Camp Buckhorn MT Orchard
 43 0 0
Omak Omk City of
 31 0 0
Buckingham Water System
 64 2 1
Hardin Housing Water System
 83 0 0
Custom Orchard 1
 60 0 0
Country River Farm
 153 1 0
P and G Orchards Camp 3
 152 0 0
Honeybear Growers
 161 0 0
Keystone Ranch
 66 0 0
Alta Lake State Park
 1,071 0 0
JN Camp Buckhorn MT Orchards
 41 1 0
Smith & Nelson
 36 0 0
Whitestone Pears
 62 2 0
All non-community systems
About this data

Water systems are matched to Okanogan County, nearest to Winthrop 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.

Town locations and ZIP code areas come from U.S. Census Bureau 2020 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.