Tapcensus

Water quality for ZIP code 99116

ZIP 99116 covers Coulee Dam, Grand Coulee, and Elmer City in Okanogan County, Washington, one of 19 ZIP codes in the county. 123 active public water systems serve the county; 46 had an EPA violation in the past three years.

Most likely your provider

Elmer City Water System WA5323120 · Community water system · Ground water
Serves 368 people Rules violated, past 3 years 2 Last sanitary survey Aug 22, 2023 Distance 2.9 mi
View system details EPA facility report

Other community water systems in Okanogan County

42 systems, nearest first
SystemServesStatusRules violated, 3 yrDistance
Coulee Dam Water Dept
 1,454 0 4.8 mi
Nespelem Water Dept
 510 0 9.6 mi
P and G Orchards Camp 2
 489 1 36.0 mi
Aston Estates
 141 0 36.7 mi
Homestead Mobile Home Park
 105 0 36.7 mi
Coleman Butte Water Assn
 250 0 37.2 mi
Suncrest Plat Water System
 260 0 37.2 mi
Sandflat Water Association
 260 0 37.3 mi
Vista Vue Water Users Assn
 60 0 37.4 mi
Omak City of
 4,940 0 37.8 mi
Okanogan Water Department City of
 3,817 1 38.0 mi
Brewster Flat Domestic Water Assn
 542 0 38.3 mi
M J Trailer Ranch
 100 0 38.5 mi
Progressive Flat Water Assn
 335 0 38.7 mi
Duck Lake Water Association
 635 0 39.1 mi
Brewster City of
 3,843 1 39.8 mi
Emanuel Heights Water System
 60 2 40.0 mi
Jaw Farms INC
 636 0 42.0 mi
Riverside Town of
 429 5 42.4 mi
Pateros Water Department
 1,149 1 44.8 mi
Alta Lake Golf Course Plat
 161 0 46.5 mi
Pinecrest Subdivison Owners
 63 0 47.2 mi
Crumbacher Estates Water System
 111 0 47.6 mi
Old Orchard Estates Water System
 86 0 51.2 mi
Tonasket Water System
 2,398 0 52.0 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
Arrowhead Ranch
 140 0 0
Bridgeport State Park
 441 0 0
Gamble Sands
 70 0 0
JN Camp Buckhorn MT Orchards
 41 1 0
P and G Orchards Camp 3
 152 0 0
Okanogan County Fair Water System
 867 2 0
Our Lady of Valley Catholic Church
 60 2 0
Honeybear Growers
 161 0 0
Buckingham Water System
 64 2 1
Roadway Stores INC
 27 0 0
Wagon Wheel Bar & Grill
 26 1 0
Emerald City Green Machine
 155 0 0
Omak Omk City of
 31 0 0
Hardin Housing Water System
 83 0 0
Custom Orchard 1
 60 0 0
Keystone Ranch
 66 0 0
Country River Farm
 153 1 0
Alta Lake State Park
 1,071 0 0
Alamo Orchard CO Pateros
 48 2 0
Okanogan Neighbors
 1,600 0 0
Indian Camp Buckhorn MT Orchard
 43 0 0
Poirier Orchard
 50 0 0
Conconully City Well
 299 0 0
Liars Cove
 73 1 0
Conconully SP Primitive Area
 129 0 0
Loup Loup Ski Area
 350 1 0
Tonasket Free Methodist Church
 120 0 0
Conconully SP Boat Launch
 258 0 0
Whitestone Pears
 62 2 0
Shady Pines Resort
 62 0 0
Jacks RV Park 1
 24 0 0
Conconully Bible Camp
 71 1 0
Lazy Daze Water Association
 21 0 0
Sit N Bull Saloon
 76 1 0
Red Rock Saloon
 100 0 0
Bonaparte Lake Resort
 104 2 0
Bonaparte Lake Campground-Well 4
 15 2 0
Lost Lake Campgound
 32 2 0
OK Ranch INC
 13 0 0
Gold Digger Orchards (north Co.) #2
 66 0 0
Spectacle Lake Resort
 35 1 0
Riverbend RV Park
 222 0 0
Sonora Point Resort
 2 0 0
Ncsb
 71 1 0
Smith & Nelson
 36 0 0
Bear Creek Golf Course
 68 1 0
Liberty Bell High School
 642 0 0
Sun Cove Water System
 23 2 0
Pearrygin Lake State Park Both CG
 2,103 1 0
Winthrop KOA
 77 2 0
All non-community systems
About this data

Water systems are matched to Okanogan 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.