Tapcensus

Washington

Snohomish County drinking water quality

169 active public water systems serve 1,035,980 people in Snohomish County. 101 are compliant, 68 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.

Active systems 169 119 community systems
People served 1M by public water systems
Systems with violations 68 40% of active systems, past 3 years
Serious violators 0 0 systems carry a health flag

Community water systems

119 systems, largest first
SystemServesStatusRules violated, 3 yrUnresolved
Alderwood Water District
 245,715 0 0
Everett Public Works Dept. City of
 215,774 0 0
Marysville Utilities
 88,582 1 0
Lynnwood City of
 68,204 0 0
Sno Pud 1 Lake Stevens
 67,710 1 0
Silver Lake Water & Sewer District
 65,033 0 0
Edmonds City of
 34,065 0 0
Mukilteo Water & Wastewater Distr
 31,437 0 0
Arlington City of
 29,508 0 0
Mountlake Terrace City of
 26,402 1 0
Cross Valley Water District
 24,695 0 0
Monroe Water System
 23,467 1 0
Olympic View Water & Sewer District
 17,784 1 0
Stanwood Water Dept City of
 17,586 0 0
Snohomish City of
 16,367 0 0
Sultan Water Department
 8,424 0 0
Seven Lakes Water Association
 5,823 0 0
Granite Falls City of
 5,349 0 0
Roosevelt Water Association
 3,530 1 0
Highland Water District
 3,121 2 0
Sno Pud 1 Warm Beach
 2,977 1 0
Gold Bar City of
 2,745 1 0
Darrington Town of
 2,246 1 0
Three Lakes Water Association
 2,198 0 0
Sno Pud 1 May Creek
 1,374 1 0
Warm Beach Conference Grounds
 1,190 1 0
Sno Pud 1 Storm Lake Ridge
 786 1 0
Wilderness Ridge Community Club
 664 1 0
Startup Water District
 643 0 0
Priest Point Beach Water INC
 624 1 1
Sno Pud 1 Sunday Lake
 561 1 0
Lake Alyson
 463 1 0
Wilkshire Lane Water District INC
 460 0 0
Wandering Creek Homeowners Assoc
 457 2 0
Index Water Dept
 420 3 0
Big Bend Landowners Association
 419 0 0
Sno Pud 1 Skylite Tracts
 415 1 0
Tatoosh Water Company
 387 1 1
Hat Island Community INC
 348 1 0
Sultan Estates Water System
 340 0 0
Kackman Creek
 330 1 0
Machias Ridge Homeowners Assoc.
 324 0 0
Cedar Springs Camp
 308 3 0
McKees Beach Assoc
 290 0 0
Cascade Vista HOA
 260 1 0
Aqua Copia/horse Country Estates
 250 0 0
Eagle Ridge
 250 0 0
Marbello
 245 0 0
Lochaven Water
 225 0 0
Schluter Water Association
 224 0 0
Non-community systems (50: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

SystemServesStatusRules violated, 3 yrUnresolved
Kayak Point County Park
 978 0 0
Whitehorse Mercantile Water System
 930 1 0
Wallace Falls State Park
 759 0 0
Rivershore Water District #1
 572 0 0
Zekes Drive-In
 502 0 0
Thunderbird Park
 454 1 0
Craven Farm Water System
 431 1 0
Donnas Mini Market Water System
 300 0 0
Arlington Lds Church
 299 0 0
Stanwood Deli & Gas
 299 1 0
Kayak Point Golf Course
 279 0 0
Lake Bronson Assoc INC
 257 0 0
Pilaguamish Community Club
 255 1 0
Mount Index Cafe
 206 0 0
Normanna Park Inc.
 202 2 0
Verlot Public Service Center
 201 1 0
Hidden Valley Camp
 181 0 0
Triangle Recreation Camp WS
 159 1 0
Camp Kalsman Water System
 124 0 0
Green Gables Resort
 112 0 0
US Naval Radio Station(t)jim Crk
 111 0 0
Masonic Park
 107 2 0
Camp Edward
 106 0 0
Trafton Grocery
 104 0 0
Mountain View Inn Water System
 102 0 0
Smith Gardens Water System
 90 1 0
Stanwood Kingdom Hall
 75 0 0
Cyo Camp Hamilton
 69 2 0
River Meadows County Park
 64 0 0
Huston Camp & Conference Center
 63 1 0
Sisco Heights Community Church
 51 1 0
Oso General Store
 50 1 0
Gold Bar Nature Trails
 49 2 0
Spee-Bi-Dah
 41 1 0
North Country Chapel
 40 0 0
Squire Creek County Park
 36 0 0
164th ST Artesian Well
 35 0 0
Green Acres Day Care
 35 1 0
Arlington Fuel Stop INC
 34 1 0
Troublesome Creek Campground
 32 0 0
Darrington Kingdom Hall
 30 0 0
Pasados Safe Haven Water System
 30 0 0
Wallace River Salmon Hatchery
 29 1 0
Noah Animal Shelter Water System
 25 0 0
Sno Pud 1 212 Market & Deli
 25 0 0
Seattle Rifle and Pistol
 25 0 0
Seven Oaks Driving Range WS
 25 0 0
Allendale Community Water
 24 0 0
Tall Firs Assessors Plat
 23 0 0
Tualco Water Association
 21 0 0
Inactive systems (203, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

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.