States / Washington / Drinking Water
Drinking Water Systems in Washington
2,311 community water systems serving about 9,564,273 people. 230 have a health-based violation on record since 2015, 4 of them unresolved.
SystemHealth-based violations (2015+)
PARKWOOD APARTMENTS · Thurston County · 60 served · groundwater2 (1 unresolved)
BRIDGEHAVEN COMMUNITY CLUB · Jefferson County · 623 served · groundwater1 (1 unresolved)
SUNSET DEVELOPMENT COMM CLUB · Island County · 92 served · groundwater1 (1 unresolved)
KELLEY CREST · Cowlitz County · 45 served · groundwater1 (1 unresolved)
ORIENT WATER COMPANY · Ferry County · 167 served · surface water87
WALLA WALLA WATER DIVISION · Walla Walla County · 42,959 served · surface water81
RED GATE MOBILE HOME PARK · Pierce County · 25 served · groundwater69
DELTA WATER ASSOCIATION · Whatcom County · 450 served · groundwater65
DEVRIES ROAD COMMUNITY ASSN · Island County · 76 served · groundwater46
LISECC · Whatcom County · 357 served · surface water41
MCNEIL ISLAND WATER · Pierce County · 692 served · groundwater32
COUNTRY CLUB ESTATES 521 · Thurston County · 113 served · groundwater30
SUNDANCE IMPROVEMENT ASSOCIATION · Benton County · 100 served · groundwater28
RIDGEVIEW ESTATES COMMUNITY ASSN. · Island County · 75 served · groundwater26
CALMOR COVE CLUB · Whatcom County · 44 served · surface water26
WOODGLEN PRD WATER SYSTEM · Island County · 40 served · groundwater26
PENN COVE WATER AND SEWER DISTRICT · Island County · 460 served · groundwater24
TAMOSHAN · Thurston County · 260 served · groundwater22
SPRING POINT HOMEOWNERS ASSOCIATION · San Juan County · 85 served · surface water21
FAIRWAY NUMBER THREE WATER · San Juan County · 39 served · groundwater20
WHIDBEY WEST WATER ASSOC. · Island County · 415 served · groundwater19
ARROWHEAD BEACH COOP WATER ASSOC · Island County · 167 served · groundwater18
WILDAIRE ESTATES · Thurston County · 146 served · groundwater18
PINECROFT MOBILE HOME PARK · Spokane County · 248 served · groundwater17
CAMPBELLS GLEN · Island County · 62 served · groundwater17
BONNIE VIEW WATER · Island County · 50 served · groundwater17
BEVERLY BEACH IMPROVEMENT CLUB · Island County · 56 served · groundwater15
E.L.C. WATER SYSTEM · San Juan County · 36 served · groundwater15
SUNRISE ESTATES WATER SYSTEM · Franklin County · 33 served · groundwater15
SURFSIDE HOMEOWNERS · Pacific County · 2,687 served · groundwater14
OYSTERVILLE WATER · Pacific County · 72 served · groundwater14
CAMANO SUNSET WATER SYSTEM · Island County · 47 served · groundwater14
TOWNSHIP 29 WATER ASSOCIATION · Island County · 42 served · groundwater14
BC WATER CO · Benton County · 1,262 served · groundwater13
PARKER SPRING ACRES WATER ASSOC · Grant County · 255 served · groundwater13
CAPE SAN JUAN WATER DISTRICT · San Juan County · 164 served · groundwater13
EASTGATE · Island County · 76 served · groundwater13
AgriNorthwest Riverbend · Benton County · 59 served · groundwater12
COLUMBIA CREST ESTATES · Cowlitz County · 48 served · groundwater12
BOSTON HARBOR · Thurston County · 1,153 served · groundwater11
SARATOGA WATER DISTRICT · Island County · 477 served · groundwater10
MARTIN CREEK COMMUNITY ASSN · Ferry County · 108 served · groundwater10
HOLIDAY HILLS COMMUNITY CLUB INC · Pierce County · 50 served · groundwater10
Prairie Village Mobile Home Court · Pierce County · 40 served · groundwater10
SIERRA COUNTRY CLUB · Island County · 400 served · groundwater9
GOLDEN VALLEY WATER ASSN · Grant County · 138 served · groundwater9
BEACHWOOD WATER COMPANY · Island County · 90 served · groundwater9
OWNERS ASSOC OF BEACH CLUB CONDOS · Whatcom County · 31 served · groundwater9
ROLLING HILLS-GLENCAIRN · Island County · 872 served · groundwater8
PORTLAND FAIR ESTATES · San Juan County · 130 served · groundwater8
CORBETT CREEK · Stevens County · 95 served · groundwater8
SUMMERLAND · Island County · 85 served · groundwater8
TAYLOR ROAD WATER SYSTEM · Island County · 50 served · groundwater8
MT VIEW WATER SYSTEM · Grant County · 44 served · groundwater8
BADGER MOUNTAIN IRRIGATION DISTRICT · Benton County · 2,331 served · purchased surface water7
Plymouth Water District · Benton County · 288 served · groundwater7
HARTWOOD WATER SYSTEM · Pierce County · 95 served · groundwater7
CUSICK TOWN OF · Pend Oreille County · 672 served · surface water6
GOSS LAKE PARK COMMUNITY · Island County · 285 served · groundwater6
HIWAY TRAILER COURT · Garfield County · 36 served · groundwater6
MAPLE HILL PARK · Island County · 35 served · groundwater6
WESTPORT WATER DEPARTMENT · Grays Harbor County · 5,346 served · groundwater5
WHITE SALMON CITY OF · Klickitat County · 4,077 served · surface water5
Great Basin Water Burbank · Walla Walla County · 656 served · groundwater5
HIDE-AWAY WATER COMPANY INC · Island County · 240 served · groundwater5
RATHBONE PARK WATER ASSOC · Whatcom County · 240 served · groundwater5
LAKESIDE PARK · Ferry County · 180 served · groundwater5
SUNSET PARK WATER CO · King County · 21 served · groundwater5
WATER DISTRICT 19 · King County · 5,335 served · surface water4
LONG BEACH WATER DEPARTMENT · Pacific County · 4,628 served · surface water4
VADER-ENCHANTED VALLEY · Lewis County · 985 served · surface water4
PE ELL TOWN OF · Lewis County · 859 served · surface water4
HARTSTENE POINTE · Mason County · 460 served · groundwater4
ISLE AIRE BEACH ASSOCIATION · Whatcom County · 125 served · groundwater4
PARKWOOD · Island County · 65 served · groundwater4
TEEN CHALLENGE · Spokane County · 61 served · groundwater4
HANNAH HEIGHTS #2 WATER USERS ASSN · San Juan County · 44 served · groundwater4
Cole Point Association · Pierce County · 37 served · groundwater4
Basin City Water Sewer District · Franklin County · 1,740 served · groundwater3
CARROLLS WATER ASSN · Cowlitz County · 449 served · groundwater3
HOLDEN VILLAGE · Chelan County · 228 served · surface water3
WILLEYS LAKE TERRACE WATER ASSN · Whatcom County · 180 served · groundwater3
Buck Creek · Pierce County · 165 served · surface water3
BEVERLY WATER DISTRICT · Grant County · 120 served · groundwater3
BROOKSIDE · Clark County · 100 served · groundwater3
WESTBOURNE ACRES · Walla Walla County · 94 served · groundwater3
BRIARWOOD WATER SYSTEM · Island County · 44 served · groundwater3
SEAWEST WATER SYSTEM · Island County · 38 served · groundwater3
SEATTLE PUBLIC UTILITIES · King County · 1,161,961 served · surface water2
LYNDEN WATER DEPARTMENT · Whatcom County · 20,062 served · surface water2
NAVAL BASE KITSAP AT BREMERTON · Kitsap County · 11,792 served · purchased surface water2
KING COUNTY WATER DISTRICT #54 · King County · 5,373 served · purchased surface water2
Raymond Water Department · Pacific County · 4,620 served · surface water2
EASTSOUND WATER USERS ASSOCIATION · San Juan County · 3,711 served · surface water2
CRESCENT WATER ASSN · Clallam County · 2,360 served · surface water2
JACKSON PARK NAVAL HOSPITAL · Kitsap County · 2,277 served · purchased surface water2
Pelican Point By Cascadia LLC · Grant County · 1,357 served · groundwater2
CONCRETE UTILITIES · Skagit County · 1,234 served · groundwater2
DIAMOND POINT · Clallam County · 810 served · groundwater2
JEFFERSON COUNTY WATER DIST #1 · Jefferson County · 600 served · groundwater2
RAINIER SCHOOL · Pierce County · 556 served · surface water2
BLACK LAKE BIBLE CAMP & CONF CTR · Thurston County · 477 served · groundwater2
LAKE ALYSON · Snohomish County · 463 served · groundwater2
MCKEES BEACH ASSOC · Snohomish County · 290 served · groundwater2
BRONSON BEACH CLUB · Thurston County · 225 served · groundwater2
GROVE TERRACE MHP TWO LLC · Grant County · 220 served · groundwater2
SHADOWOOD · Mason County · 154 served · groundwater2
RIVER ROAD MOBILE HOME PARK · Okanogan County · 150 served · groundwater2
CRESTVIEW WEST WATER SYSTEM · King County · 147 served · groundwater2
CAMPO HACIENDA · Island County · 123 served · groundwater2
RANGEVIEW · Franklin County · 122 served · groundwater2
TALCOTT RIDGE 695 · Thurston County · 102 served · groundwater2
DUGGAN FALLS · Skamania County · 100 served · groundwater2
NORTH SLOPE ESTATES PROPERTY · Franklin County · 97 served · groundwater2
DEER LAKE HAVEN INC · Island County · 90 served · groundwater2
OLYMPIC MARINE VIEW WATER ASSOC · Island County · 89 served · groundwater2
FERNDALE ESTATES LLC · Whatcom County · 85 served · groundwater2
ISSAQUAH VALLEY WATER ASSN #1 · King County · 80 served · groundwater2
THUNDERBIRD TERRACE WATER SYSTEM · Snohomish County · 75 served · surface water2
SUN TIDES COMMUNITY LLC · Yakima County · 63 served · groundwater2
STONE CREEK ESTATES WATER ASSN. · King County · 62 served · groundwater2
SHOREWOOD · Thurston County · 54 served · groundwater2
CEDAR PARK · Thurston County · 53 served · groundwater2
MOUNTAIN VIEW MOBILE HOME PARK · Pierce County · 45 served · groundwater2
OLYMPIC TRAILS WATER SUPPLY · Mason County · 44 served · groundwater2
EVERGREEN RETREAT MHP · Whatcom County · 39 served · groundwater2
GRANDVIEW CITY OF · Yakima County · 11,010 served · groundwater1
SELAH CITY OF · Yakima County · 9,331 served · groundwater1
YAK CO - TERRACE HEIGHTS · Yakima County · 8,410 served · groundwater1
Mattawa City of · Grant County · 5,370 served · groundwater1
CONNELL CITY OF · Franklin County · 5,150 served · groundwater1
MINTERBROOK · Pierce County · 5,083 served · groundwater1
WARDEN CITY OF · Grant County · 4,674 served · groundwater1
ZILLAH CITY OF · Yakima County · 3,518 served · groundwater1
YACOLT · Clark County · 3,034 served · groundwater1
FALL CITY WATER DIST. #127 · King County · 2,987 served · groundwater1
WESTERN STATE HOSPITAL · Pierce County · 2,857 served · groundwater1
MILLWOOD CITY OF · Spokane County · 1,925 served · groundwater1
LANGLEY CITY OF · Island County · 1,416 served · groundwater1
CHELAN CO PUD1 - Peshastin · Chelan County · 1,397 served · groundwater1
LAKEVIEW PARK WATER ASSN · Grant County · 1,259 served · groundwater1
Monse-Riggan Camp · Okanogan County · 1,165 served · groundwater1
WEILER-MARTIN TRACTS WATER ASSN · Grant County · 1,163 served · groundwater1
MEADOWMEER · Kitsap County · 1,157 served · groundwater1
SCATCHET HEAD WATER DISTRICT · Island County · 900 served · groundwater1
LAKE OF THE WOODS COMMUNITY CLUB · Pierce County · 870 served · groundwater1
Lewis Co Water Sewer Dist #6 · Lewis County · 740 served · groundwater1
VISTAIRE WATER SYSTEM · Island County · 647 served · groundwater1
RAFT ISLAND · Pierce County · 575 served · groundwater1
INCHELIUM WATER DISTRICT · Ferry County · 540 served · groundwater1
MOUNT BAKER WATER ASSOCIATION · Whatcom County · 500 served · groundwater1
UPPER COLUMBIA ACADEMY · Spokane County · 380 served · groundwater1
CRESTON PUBLIC WATER · Lincoln County · 348 served · groundwater1
PROGRESSIVE FLAT WATER ASSN · Okanogan County · 335 served · purchased groundwater1
HOMESTEAD MANUFACTURED HOUSING · Benton County · 300 served · groundwater1
DESERT CANYON DOMESTIC WATER SYSTEM · Douglas County · 292 served · groundwater1
NORTHPORT WATER SYSTEM · Stevens County · 290 served · groundwater1
CEDAR GLEN MOBILE HOME PARK · Kitsap County · 284 served · groundwater1
INDIAN HILLS ESTATES · Kitsap County · 282 served · groundwater1
KEANLAND PARK 761 · Thurston County · 268 served · groundwater1
Cypress Country Estates · Franklin County · 253 served · groundwater1
PRAIRIE RIDGE 605 · Thurston County · 250 served · groundwater1
HARTLINE WATER SYSTEM · Grant County · 249 served · groundwater1
SHIRONA WATER SYSTEM · Island County · 243 served · groundwater1
KING COUNTY WATER DISTRICT #123 · King County · 242 served · groundwater1
VISTAS INC · Clallam County · 241 served · groundwater1
DIXIE WATER ASSOCIATION · Walla Walla County · 240 served · groundwater1
MERIDIAN TERRACE MOBILE HOME PARK · Pierce County · 229 served · groundwater1
FOUR SEASONS PARK · Clallam County · 225 served · groundwater1
DRIFTWOOD SHORES WATER SYSTEM INC · Island County · 222 served · groundwater1
Saddle Mountain Water Assoc. · Adams County · 219 served · groundwater1
Colony Mountain · Skagit County · 213 served · groundwater1
HARRIS CUSTER ESTATES WATER ASSN · Island County · 194 served · groundwater1
LONG POINT WATER COMPANY INC · Island County · 182 served · groundwater1
PINE TERRACE WATER ASSOCIATION · Island County · 181 served · groundwater1
EVERGREEN MOBILE PARK & SALES · Whatcom County · 180 served · groundwater1
TAYLOR BAY BEACH CLUB INC · Pierce County · 175 served · groundwater1
LAKEWOOD HEIGHTS · Mason County · 170 served · groundwater1
SEA VIEW · Grays Harbor County · 170 served · groundwater1
COUNTRY VILLA MOBILE PARK · Stevens County · 162 served · groundwater1
BEAR CUB · Kitsap County · 155 served · groundwater1
CHERRY CREEK · King County · 138 served · groundwater1
PARKLANE WATER ASSOCIATION · Island County · 127 served · groundwater1
Wilgus Housing Water System · Benton County · 121 served · groundwater1
GREEN MOUNTAIN ACRES · Kitsap County · 110 served · groundwater1
SALKUM WATER SUPPLY · Lewis County · 103 served · groundwater1
Little Butte Water System · Chelan County · 101 served · surface water1
PINE ACRES MOBILE HOME PARK · Spokane County · 100 served · groundwater1
T-11 Farmworker Housing · Grant County · 99 served · groundwater1
ENTERPRISE TERRACE WATER ASSN. · Whatcom County · 95 served · groundwater1
MARBLE WATER SYSTEM · Stevens County · 94 served · groundwater1
MAYFIELD KAMPER KLUB · Lewis County · 87 served · groundwater1
MOUNT BAKER MOBILE HOME PARK · Whatcom County · 87 served · groundwater1
PRESSENTIN CREEK WILDERNESS · Skagit County · 81 served · groundwater1
LOFALL WATER SYSTEM INC · Kitsap County · 81 served · groundwater1
INWOOD BEACH CLUB · Kitsap County · 80 served · groundwater1
ARDEN HILLS WATER SYSTEM · Stevens County · 80 served · groundwater1
THREE FINGERS · Mason County · 78 served · groundwater1
SMITH ROAD WATER ASSOCIATION · Whatcom County · 77 served · groundwater1
SUNSET WEST · Island County · 75 served · groundwater1
PLEASANT VALLEY WATER SYSTEM · Whatcom County · 73 served · groundwater1
MOUNTAIN VIEW · Skamania County · 72 served · groundwater1
HERITAGE WEST · Thurston County · 70 served · groundwater1
Firstfruits Farms · Walla Walla County · 68 served · groundwater1
LAKE PLEASANT MOBILE HOME & RV PARK · Clallam County · 66 served · groundwater1
QUAIL RUN · Thurston County · 66 served · groundwater1
TIMBERLANE MOBILE HOME PARK · Lewis County · 63 served · groundwater1
SUBURBAN MOBILE PARK · Island County · 60 served · groundwater1
WITHROW WATER WORKS · Douglas County · 60 served · groundwater1
FALL CITY WATER DIST. (PLUM CREEK) · King County · 59 served · groundwater1
DOUBLE L MOBILE HOME PARK · Whatcom County · 58 served · groundwater1
TULARE BEACH ASSOCIATION · Snohomish County · 54 served · groundwater1
DIABLO WTR SYS-SEATTLE CITY LIGHT · Whatcom County · 53 served · groundwater1
NEEDLE CREEK WATER SYSTEM · King County · 50 served · groundwater1
LAKEVIEW · Franklin County · 50 served · groundwater1
BEVERLY BEACH HOMEOWNERS · Thurston County · 50 served · groundwater1
GATEWOOD MOBILE MANOR · Kitsap County · 46 served · groundwater1
HILLSIDE PARK ADDITION · Yakima County · 45 served · groundwater1
CHATTAROY SPRINGS WATER ASSN · Spokane County · 43 served · groundwater1
CAMANO ISLAND SUMMIT ASSOC. · Island County · 42 served · groundwater1
RICHMOND TOTTEN · Thurston County · 42 served · groundwater1
GOOD NEIGHBORS WATER ASSN · Benton County · 40 served · groundwater1
PROSPECT HEIGHTS COMM WATER ASSN · Walla Walla County · 40 served · groundwater1
SAN JUAN FAIRWAYS OWNERS ASSN · San Juan County · 40 served · groundwater1
GEORGETOWN WATER ASSOCIATION · Island County · 32 served · groundwater1
MT VIEW TRACTS · Benton County · 31 served · groundwater1
SMITH COVE · Mason County · 30 served · groundwater1
HEATHER WATER WORKS · Pacific County · 29 served · groundwater1
Mountain Ridge · Kittitas County · 28 served · groundwater1
HAZEL DELL MOBILE PARK · Cowlitz County · 24 served · groundwater1
TACOMA WATER DIVISION CITY OF · Pierce County · 446,170 served · surface waternone on record
VANCOUVER CITY OF · Clark County · 373,047 served · groundwaternone on record
SPOKANE CITY OF · Spokane County · 346,138 served · groundwaternone on record
BELLEVUE CITY OF · King County · 321,349 served · purchased surface waternone on record
ALDERWOOD WATER DISTRICT · Snohomish County · 245,715 served · purchased surface waternone on record
EVERETT PUBLIC WORKS DEPT. CITY OF · Snohomish County · 215,774 served · surface waternone on record
KENT WATER DEPARTMENT · King County · 166,421 served · purchased surface waternone on record
REDMOND WATER SYSTEM CITY OF · King County · 163,335 served · purchased surface waternone on record
CLARK PUBLIC UTILITIES · Clark County · 153,526 served · groundwaternone on record
LAKEHAVEN WATER AND SEWER DISTRICT · King County · 148,809 served · purchased surface waternone on record
BELLINGHAM-WATER DIVISION CITY OF · Whatcom County · 141,127 served · surface waternone on record
OLYMPIA CITY OF · Thurston County · 126,966 served · groundwaternone on record
KENNEWICK CITY OF · Benton County · 118,164 served · surface waternone on record
PASCO WATER DEPARTMENT · Franklin County · 115,102 served · surface waternone on record
YAKIMA WATER DIVISION CITY OF · Yakima County · 112,858 served · surface waternone on record
SKAGIT COUNTY PUD 1 JUDY RES · Skagit County · 111,415 served · surface waternone on record
RENTON CITY OF · King County · 108,091 served · groundwaternone on record
Auburn City of · King County · 107,655 served · groundwaternone on record
RICHLAND CITY OF · Benton County · 106,499 served · surface waternone on record
LACEY WATER DEPARTMENT · Thurston County · 105,178 served · groundwaternone on record
HIGHLINE WATER DISTRICT · King County · 100,170 served · purchased surface waternone on record
NORTHSHORE UTILITY DISTRICT · King County · 99,789 served · purchased surface waternone on record
PUYALLUP CITY OF · Pierce County · 94,520 served · purchased surface waternone on record
MARYSVILLE UTILITIES · Snohomish County · 88,582 served · purchased surface waternone on record
LAKEWOOD WATER DISTRICT · Pierce County · 82,425 served · groundwaternone on record
SAMMAMISH PLATEAU WATER & SEWER · King County · 79,362 served · purchased surface waternone on record
SOOS CREEK WATER & SEWER DISTRICT · King County · 74,172 served · purchased surface waternone on record
BREMERTON CITY OF · Kitsap County · 72,951 served · surface waternone on record
KIRKLAND CITY OF · King County · 69,243 served · purchased surface waternone on record
LYNNWOOD CITY OF · Snohomish County · 68,204 served · purchased surface waternone on record
SNO PUD 1 - LAKE STEVENS · Snohomish County · 67,710 served · purchased surface waternone on record
WOODINVILLE WATER DISTRICT · King County · 66,699 served · purchased surface waternone on record
SILVER LAKE WATER & SEWER DISTRICT · Snohomish County · 65,033 served · purchased surface waternone on record
SOUTHWOOD · Pierce County · 64,155 served · purchased surface waternone on record
LONGVIEW WATER DEPARTMENT · Cowlitz County · 57,617 served · groundwaternone on record
COVINGTON WATER DISTRICT · King County · 56,172 served · purchased surface waternone on record
TUMWATER CITY OF · Thurston County · 51,802 served · groundwaternone on record
KING COUNTY WATER DISTRICT #20 · King County · 48,469 served · purchased surface waternone on record
WENATCHEE CITY OF · Chelan County · 43,690 served · groundwaternone on record
ISSAQUAH WATER SYSTEM · King County · 43,584 served · purchased surface waternone on record
BONNEY LAKE WATER DEPARTMENT CITY · Pierce County · 43,371 served · purchased surface waternone on record
NOB HILL WATER ASSOCIATION · Yakima County · 38,050 served · groundwaternone on record
TUKWILA WATER DEPARTMENT · King County · 36,298 served · purchased surface waternone on record
FIRGROVE MUTUAL INC · Pierce County · 36,168 served · purchased surface waternone on record
JBLM Lewis · Pierce County · 35,414 served · groundwaternone on record
SILVERDALE WATER DIST 16 · Kitsap County · 35,163 served · groundwaternone on record
SPANAWAY WATER COMPANY · Pierce County · 34,506 served · groundwaternone on record
EDMONDS CITY OF · Snohomish County · 34,065 served · purchased surface waternone on record
PARKLAND LIGHT & WATER COMPANY · Pierce County · 33,775 served · groundwaternone on record
BOTHELL WATER CITY OF · King County · 33,643 served · purchased surface waternone on record
North City Water District · King County · 32,847 served · purchased surface waternone on record
MOSES LAKE CITY OF · Grant County · 32,428 served · groundwaternone on record
CAMAS MUNICIPAL WATER SEWER SYSTEM · Clark County · 31,794 served · groundwaternone on record
Mukilteo Water & Wastewater Distr · Snohomish County · 31,437 served · purchased surface waternone on record
PULLMAN WATER DEPARTMENT CITY OF · Whitman County · 31,315 served · groundwaternone on record
MERCER ISLAND CITY OF · King County · 31,057 served · purchased surface waternone on record
BATTLE GROUND WATER DEPT CITY OF · Clark County · 30,237 served · groundwaternone on record
ARLINGTON CITY OF · Snohomish County · 29,508 served · purchased surface waternone on record
FIFE DEPT OF PUBLIC WORKS · Pierce County · 29,091 served · purchased surface waternone on record
West Sound Utility District #1 · Kitsap County · 28,930 served · groundwaternone on record
CEDAR RIVER WATER & SEWER DISTRICT · King County · 28,671 served · purchased surface waternone on record
CENTRALIA PUBLIC WORKS - WATER · Lewis County · 28,164 served · groundwaternone on record
PORT ANGELES CITY OF · Clallam County · 28,067 served · surface waternone on record
WHITWORTH WATER DISTRICT 2 · Spokane County · 26,883 served · groundwaternone on record
EAST WENATCHEE WATER DISTRICT · Douglas County · 26,519 served · purchased groundwaternone on record
MOUNTLAKE TERRACE CITY OF · Snohomish County · 26,402 served · purchased surface waternone on record
ANACORTES CITY OF · Skagit County · 25,109 served · surface waternone on record
CROSS VALLEY WATER DISTRICT · Snohomish County · 24,695 served · purchased surface waternone on record
VERA WATER & POWER · Spokane County · 24,692 served · groundwaternone on record
NORTH PERRY AVE WATER DISTRICT · Kitsap County · 24,402 served · groundwaternone on record
Lake Meridian Water District · King County · 24,231 served · purchased surface waternone on record
OAK HARBOR CITY OF · Island County · 23,675 served · purchased surface waternone on record
KING COUNTY WATER DISTRICT #49 · King County · 23,492 served · purchased surface waternone on record
MONROE WATER SYSTEM · Snohomish County · 23,467 served · purchased surface waternone on record
ENUMCLAW WATER DEPARTMENT · King County · 23,276 served · groundwaternone on record
ABERDEEN CITY OF · Grays Harbor County · 22,867 served · surface waternone on record
PUD #1 OF ASOTIN COUNTY · Asotin County · 21,930 served · groundwaternone on record
KING COUNTY WATER DISTRICT #125 · King County · 21,904 served · purchased surface waternone on record
WASHINGTON STATE UNIVERSITY · Whitman County · 21,506 served · groundwaternone on record
WASHOUGAL CITY OF · Clark County · 21,441 served · groundwaternone on record
WEST RICHLAND CITY OF · Benton County · 21,231 served · purchased surface waternone on record
RIDGEFIELD PUBLIC WORKS · Clark County · 21,225 served · groundwaternone on record
CONSOLIDATED IRRIG DIST 19 SYSTEM 2 · Spokane County · 21,220 served · groundwaternone on record
ELLENSBURG WATER DEPT · Kittitas County · 20,900 served · groundwaternone on record
SNOQUALMIE WATER · King County · 20,222 served · groundwaternone on record
KING COUNTY WATER DISTRICT NO 90 · King County · 20,100 served · purchased surface waternone on record
FERNDALE · Whatcom County · 19,305 served · groundwaternone on record
SUMMIT WATER & SUPPLY CO · Pierce County · 19,125 served · groundwaternone on record
SPO CO WATER DIST 3 SYS 1 · Spokane County · 19,035 served · groundwaternone on record
MODERN ELECTRIC WATER CO · Spokane County · 18,487 served · groundwaternone on record
POULSBO CITY OF · Kitsap County · 18,400 served · groundwaternone on record
OLYMPIC VIEW WATER & SEWER DISTRICT · Snohomish County · 17,784 served · surface waternone on record
STANWOOD WATER DEPT CITY OF · Snohomish County · 17,586 served · groundwaternone on record
YELM CITY OF · Thurston County · 17,355 served · groundwaternone on record
SUNNYSIDE CITY OF · Yakima County · 17,194 served · groundwaternone on record
EASTERN WASHINGTON UNIVERSITY · Spokane County · 17,108 served · groundwaternone on record
PORT TOWNSEND CITY OF · Jefferson County · 17,053 served · surface waternone on record
CHENEY CITY OF · Spokane County · 16,954 served · groundwaternone on record
NAVAL BASE KITSAP AT BANGOR · Kitsap County · 16,828 served · groundwaternone on record
NAVAL AIR STATION/WHIDBEY ISLAND · Island County · 16,595 served · purchased surface waternone on record
GIG HARBOR WATER DEPT · Pierce County · 16,510 served · groundwaternone on record
NORTH PENINSULA · Kitsap County · 16,449 served · groundwaternone on record
SUMNER CITY OF · Pierce County · 16,438 served · groundwaternone on record
SNOHOMISH CITY OF · Snohomish County · 16,367 served · purchased surface waternone on record
CHELAN CO PUD 1 · Chelan County · 16,190 served · purchased groundwaternone on record
COAL CREEK UTILITY DISTRICT · King County · 15,989 served · purchased surface waternone on record
KELSO CITY OF · Cowlitz County · 15,775 served · groundwater under surface influencenone on record
PORT ORCHARD WATER DEPT · Kitsap County · 15,355 served · groundwaternone on record
FRUITLAND MUTUAL WATER COMPANY · Pierce County · 15,313 served · groundwaternone on record
SHELTON CITY OF · Mason County · 15,089 served · groundwaternone on record
QUIMPER · Jefferson County · 14,548 served · groundwaternone on record
LIBERTY LAKE SEWER & WATER DISTRICT · Spokane County · 14,500 served · groundwaternone on record
SEQUIM CITY OF · Clallam County · 14,293 served · groundwaternone on record
BAINBRIDGE ISLAND CITY OF · Kitsap County · 13,491 served · groundwaternone on record
DUPONT WATER SYSTEM CITY OF · Pierce County · 13,141 served · groundwaternone on record
PROSSER CITY OF · Benton County · 12,070 served · groundwaternone on record
SKYWAY WATER & SEWER · King County · 12,036 served · purchased surface waternone on record
BEACON HILL WATER & SEWER DISTRICT · Cowlitz County · 11,969 served · purchased groundwaternone on record
CHEHALIS WATER DEPARTMENT · Lewis County · 11,718 served · surface waternone on record
HOQUIAM WATER DEPARTMENT · Grays Harbor County · 11,456 served · surface waternone on record
DUVALL CITY OF · King County · 11,050 served · purchased surface waternone on record
LEAVENWORTH CITY OF · Chelan County · 11,041 served · surface waternone on record
WOODLAND CITY OF · Cowlitz County · 10,640 served · groundwater under surface influencenone on record
MANCHESTER WATER DISTRICT · Kitsap County · 10,475 served · groundwaternone on record
ORTING CITY OF · Pierce County · 10,332 served · groundwaternone on record
LWWSD - SOUTH SHORE WATER SYSTEM · Whatcom County · 10,028 served · surface waternone on record
NE SAMMAMISH SEWER & WATER DISTRICT · King County · 9,702 served · groundwaternone on record
MOUNTAIN VIEW-EDGEWOOD WATER CO · Pierce County · 9,680 served · groundwaternone on record
FAIRCHILD AIR FORCE BASE · Spokane County · 9,544 served · groundwaternone on record
AIRWAY HEIGHTS CITY OF · Spokane County · 9,489 served · groundwaternone on record
CONSOLIDATED IRRIG DIST 19 SYSTEM 1 · Spokane County · 9,434 served · groundwaternone on record
CHELAN WATER DEPT CITY OF · Chelan County · 9,425 served · surface waternone on record
OCEAN SHORES WATER DEPT · Grays Harbor County · 9,347 served · groundwaternone on record
BIRCH BAY WATER & SEWER DISTRICT · Whatcom County · 9,046 served · purchased groundwaternone on record
TOPPENISH WATER DEPARTMENT · Yakima County · 8,950 served · groundwaternone on record
PORT ANGELES COMPOSITE · Clallam County · 8,872 served · surface waternone on record
OTHELLO WATER DEPARTMENT · Adams County · 8,755 served · groundwaternone on record
UNION HILL WATER ASSOCIATION INC · King County · 8,720 served · groundwaternone on record
EPHRATA WATER DEPARTMENT · Grant County · 8,718 served · groundwaternone on record
NORTH BEND CITY OF · King County · 8,710 served · groundwaternone on record
STEILACOOM TOWN OF · Pierce County · 8,545 served · groundwaternone on record
SULTAN WATER DEPARTMENT · Snohomish County · 8,424 served · surface waternone on record
QUINCY WATER DEPARTMENT CITY OF · Grant County · 8,415 served · groundwaternone on record
COLLEGE PLACE WATER DEPT · Walla Walla County · 8,147 served · groundwaternone on record
NORTH BEACH WATER · Pacific County · 8,093 served · groundwaternone on record
MILTON CITY OF · Pierce County · 8,078 served · groundwaternone on record
KALAMA CITY OF · Cowlitz County · 8,020 served · groundwater under surface influencenone on record
FIRCREST CITY OF · Pierce County · 7,927 served · groundwaternone on record
PACIFIC CITY OF · King County · 7,925 served · groundwaternone on record
MODEL IRRIGATION DIST #18 · Spokane County · 7,903 served · groundwaternone on record
TANGLEWILDE THOMPSON PLACE 600 · Thurston County · 7,900 served · groundwaternone on record
BUCKLEY WATER · Pierce County · 7,842 served · purchased surface waternone on record
STEVENS CO PUD - SUNCREST · Stevens County · 7,484 served · groundwaternone on record
PEACOCK HILL · Pierce County · 7,401 served · groundwaternone on record
JBLM McChord Field · Pierce County · 7,290 served · groundwaternone on record
LAKE CHELAN RECLAMATION DISTRICT · Chelan County · 6,798 served · surface waternone on record
ELMA CITY OF · Grays Harbor County · 6,638 served · groundwaternone on record
SALLAL WATER ASSOCIATION INC · King County · 6,600 served · groundwaternone on record
UNION GAP WATER · Yakima County · 6,433 served · groundwaternone on record
BLACK DIAMOND WATER DEPT · King County · 6,407 served · groundwaternone on record
BLAINE CITY OF · Whatcom County · 6,319 served · groundwaternone on record
PASADENA PARK IRR DIST 17 · Spokane County · 6,269 served · groundwaternone on record
SPO CO WATER DIST 3 SYS 4 · Spokane County · 6,233 served · groundwaternone on record
MONTESANO CITY OF · Grays Harbor County · 6,204 served · groundwaternone on record
SNOQUALMIE PASS UTILITY DISTRICT · King County · 5,832 served · groundwaternone on record
ARTONDALE · Pierce County · 5,828 served · groundwaternone on record
SEVEN LAKES WATER ASSOCIATION · Snohomish County · 5,823 served · groundwaternone on record
CASHMERE WATER DEPARTMENT · Chelan County · 5,815 served · surface waternone on record
BENTON CITY WATER · Benton County · 5,626 served · groundwaternone on record
MOXEE WATER DEPARTMENT · Yakima County · 5,599 served · groundwaternone on record
NORTH BAINBRIDGE WATER CO · Kitsap County · 5,490 served · groundwaternone on record
DEER PARK CITY OF · Spokane County · 5,435 served · groundwaternone on record
GRANITE FALLS CITY OF · Snohomish County · 5,349 served · purchased surface waternone on record
WAPATO WATERWORKS · Yakima County · 5,255 served · groundwaternone on record
POINT EVANS · Pierce County · 5,211 served · groundwaternone on record
GRAYS HARBOR CO WATER DIST 2 · Grays Harbor County · 5,112 served · groundwaternone on record
MEDICAL LAKE CITY OF · Spokane County · 4,982 served · groundwaternone on record
COLVILLE WATER DEPARTMENT · Stevens County · 4,945 served · groundwaternone on record
OMAK CITY OF · Okanogan County · 4,940 served · groundwaternone on record
VINLAND · Kitsap County · 4,801 served · groundwaternone on record
STEVENSON WATER DEPT · Skamania County · 4,702 served · surface waternone on record
PATTISON 500 · Thurston County · 4,643 served · groundwaternone on record
BELFAIR WATER DISTRICT 1 · Mason County · 4,432 served · groundwaternone on record
SOUTH BAINBRIDGE · Kitsap County · 4,414 served · groundwaternone on record
CASTLE ROCK MUNICIPAL WATER · Cowlitz County · 4,367 served · surface waternone on record
ORCHARD AVENUE IRRIGATION DIST 6 · Spokane County · 4,330 served · groundwaternone on record
GOLDENDALE CITY OF · Klickitat County · 4,314 served · groundwaternone on record
EAST SPOKANE WATER DIST 1 · Spokane County · 4,285 served · groundwaternone on record
TRENTWOOD IRRIGATION DISTRICT 3 · Spokane County · 4,228 served · groundwaternone on record
SUQUAMISH · Kitsap County · 4,203 served · groundwaternone on record
CRYSTAL MOUNTAIN INC · Pierce County · 4,154 served · surface waternone on record
IRVIN WATER DISTRICT #6 · Spokane County · 4,150 served · groundwaternone on record
COUPEVILLE TOWN OF · Island County · 4,142 served · groundwaternone on record
GRANGER WATER DEPARTMENT · Yakima County · 3,993 served · groundwaternone on record
EATONVILLE WATER DEPT · Pierce County · 3,945 served · surface waternone on record
EVERSON CITY OF · Whatcom County · 3,893 served · groundwaternone on record
BREWSTER CITY OF · Okanogan County · 3,843 served · groundwaternone on record
OKANOGAN WATER DEPARTMENT CITY OF · Okanogan County · 3,817 served · groundwaternone on record
KING COUNTY WATER DISTRICT 119 · King County · 3,800 served · purchased surface waternone on record
SPO CO WATER DIST 3 SYS 3 · Spokane County · 3,768 served · groundwaternone on record
GRAND MOUND · Thurston County · 3,764 served · groundwaternone on record
PARKVIEW TERRACE · Kitsap County · 3,730 served · groundwaternone on record
LAKE CUSHMAN SYSTEM 5 · Mason County · 3,675 served · groundwaternone on record
FRIDAY HARBOR TOWN OF · San Juan County · 3,543 served · surface waternone on record
ROOSEVELT WATER ASSOCIATION · Snohomish County · 3,530 served · purchased surface waternone on record
NACHES TOWN OF · Yakima County · 3,512 served · groundwaternone on record
COLFAX WATER DEPARTMENT CITY OF · Whitman County · 3,507 served · groundwaternone on record
WINLOCK CITY OF · Lewis County · 3,502 served · groundwaternone on record
FORKS MUNICIPAL WATER DEPT · Clallam County · 3,468 served · groundwaternone on record
HORIZONS WEST · Kitsap County · 3,454 served · groundwaternone on record
ROYAL CITY WATER · Grant County · 3,389 served · groundwaternone on record
DAYTON WATER DEPARTMENT · Columbia County · 3,374 served · groundwaternone on record
Tenino City of · Thurston County · 3,336 served · groundwaternone on record
NEWPORT CITY OF · Pend Oreille County · 3,331 served · groundwaternone on record
ALGONA WATER DEPT · King County · 3,300 served · purchased surface waternone on record
OROVILLE CITY OF · Okanogan County · 3,256 served · groundwaternone on record
Fox Island Mutual Water Assoc · Pierce County · 3,255 served · groundwaternone on record
Rock Island Water Dept City of · Douglas County · 3,226 served · groundwaternone on record
AMES LAKE WATER ASSOC INC · King County · 3,224 served · groundwaternone on record
TOUTLE COMMUNITY REGIONAL WATER · Cowlitz County · 3,215 served · purchased surface waternone on record
STROHS · Pierce County · 3,192 served · groundwaternone on record
LAKE FOREST PARK WATER DISTRICT · King County · 3,171 served · groundwaternone on record
HIGHLAND WATER DISTRICT · Snohomish County · 3,121 served · purchased surface waternone on record
MEADOWS 690 · Thurston County · 3,100 served · groundwaternone on record
NAPAVINE CITY OF · Lewis County · 3,095 served · groundwaternone on record
OLYMPIC WATER & SEWER INC · Jefferson County · 3,086 served · groundwaternone on record
Snake River Housing Water System · Walla Walla County · 3,036 served · groundwaternone on record
Dry Creek Water Association · Clallam County · 3,030 served · groundwaternone on record
CARSON · Skamania County · 3,015 served · surface waternone on record
SNO PUD 1 - WARM BEACH · Snohomish County · 2,977 served · groundwaternone on record
CLEARWOOD · Thurston County · 2,956 served · groundwaternone on record
CEDAR CREST · Pierce County · 2,954 served · groundwaternone on record
South Bend Water Department · Pacific County · 2,930 served · surface waternone on record
ERLAND POINT WATER CO · Kitsap County · 2,909 served · groundwaternone on record
STEVENS CO PUD - DEER LAKE · Stevens County · 2,884 served · groundwaternone on record
DESERT AIRE OWNER ASSN · Grant County · 2,856 served · groundwaternone on record
MCCORMICK WOODS · Kitsap County · 2,760 served · purchased surface waternone on record
WEST SEQUIM BAY INC · Clallam County · 2,759 served · groundwaternone on record
RAINIER WATER DEPARTMENT · Thurston County · 2,758 served · groundwaternone on record
ILWACO WATER DEPARTMENT CITY OF · Pacific County · 2,757 served · surface waternone on record
MCCLEARY CITY OF · Grays Harbor County · 2,753 served · groundwaternone on record
GOLD BAR CITY OF · Snohomish County · 2,745 served · groundwaternone on record
KETTLE FALLS WATER DEPT · Stevens County · 2,698 served · groundwaternone on record
OLYMPIC MALL · Pierce County · 2,681 served · groundwaternone on record
Columbia Valley Water District · Whatcom County · 2,648 served · groundwaternone on record
SUNCADIA RESORT · Kittitas County · 2,640 served · purchased surface waternone on record
CHEWELAH WATER DEPT SOUTH · Stevens County · 2,615 served · groundwaternone on record
CAMANO WATER ASSOCIATION · Island County · 2,592 served · groundwaternone on record
ASOTIN WATER DEPT · Asotin County · 2,531 served · groundwaternone on record
STEVENS CO PUD - LOON LAKE · Stevens County · 2,487 served · groundwaternone on record
MALAGA WATER DISTRICT · Chelan County · 2,478 served · groundwaternone on record
CHELAN CO PUD - CHELAN RIDGE · Chelan County · 2,429 served · groundwaternone on record
NOOKSACK WATER DEPT · Whatcom County · 2,427 served · purchased groundwaternone on record
WILLAPA VALLEY WATER DISTRICT · Pacific County · 2,425 served · surface waternone on record
CARNATION WATER SYSTEM CITY OF · King County · 2,400 served · groundwaternone on record
CHEROKEE BAY COMMUNITY CLUB INC · King County · 2,400 served · groundwaternone on record
SOAP LAKE WATER DEPT · Grant County · 2,399 served · groundwaternone on record
TONASKET WATER SYSTEM · Okanogan County · 2,398 served · groundwaternone on record
IONE WATER DEPT · Pend Oreille County · 2,395 served · groundwaternone on record
BOISTFORT VALLEY · Lewis County · 2,389 served · surface waternone on record
GLACIER WATER DISTRICT · Whatcom County · 2,383 served · groundwaternone on record
PACIFIC BEACH/MOCLIPS · Grays Harbor County · 2,372 served · groundwaternone on record
TIMBERLAKE COMMUNITY CLUB INC · Mason County · 2,337 served · groundwaternone on record
VALLEY WATER SYSTEM · Pierce County · 2,259 served · purchased surface waternone on record
ALPINE WATER DISTRICT · Chelan County · 2,255 served · groundwaternone on record
WEST KITSAP · Kitsap County · 2,248 served · groundwaternone on record
KITTITAS CITY OF · Kittitas County · 2,247 served · groundwaternone on record
Darrington Town of · Snohomish County · 2,246 served · groundwaternone on record
SUNLAND WATER DISTRICT · Clallam County · 2,235 served · groundwaternone on record
WASHINGTON CORRECTIONS CENTER · Mason County · 2,223 served · groundwaternone on record
Source: U.S. EPA Safe Drinking Water Information System (SDWIS). "Health-based" counts maximum-contaminant-level, treatment-technique and maximum-residual-disinfectant-level violations recorded since 2015. A violation on record — especially a resolved one — is not a statement about water quality today; contact the water system or your state drinking-water program for current information.