Washington Tap Water Quality: Is It Safe to Drink?

2026 EPA water quality data for 150 community water systems serving 566,982+ people in Washington. Find your water system to see violations, PFAS results, lead testing, and a safety grade — free.

Washington draws drinking water from Cascade Range snowmelt, Puget Sound area rivers, and the Columbia Basin aquifer. Seattle's Cedar River watershed delivers exceptionally clean surface water. Naturally occurring arsenic is found in some eastern Washington groundwater, and PFAS contamination has been detected near military sites.

Find Your Water System in Washington

Enter your ZIP code to see EPA violations, lead test results, PFAS data, and a safety grade for your water.

📊 Data from EPA’s SDWIS · 🔄 Updated quarterly · 🏛️ 150+ water systems in Washington

ALDERWOOD WATER DISTRICT Lynnwood, WA · 245,715 people · Surface Water Purchased Auburn City of Auburn, WA · 107,655 people · Groundwater West Sound Utility District #1 Port Orchard, WA · 28,930 people · Groundwater ANACORTES CITY OF Mount Vernon, WA · 22,995 people · Surface Water ABERDEEN CITY OF Aberdeen, WA · 22,867 people · Surface Water ARLINGTON CITY OF Arlington, WA · 20,418 people · Surface Water Purchased NAVAL BASE KITSAP AT BANGOR Silverdale, WA · 16,828 people · Groundwater NAVAL AIR STATION/WHIDBEY ISLAND NAS Whidbey Island, WA · 16,595 people · Surface Water Purchased NAVAL BASE KITSAP AT BREMERTON Silverdale, WA · 11,792 people · Surface Water Purchased AIRWAY HEIGHTS CITY OF Airway, WA · 9,489 people · Groundwater ARTONDALE Tacoma, WA · 5,828 people · Groundwater LAKE CUSHMAN SYSTEM 5 Hoodsport, WA · 3,675 people · Groundwater ALGONA WATER DEPT Algona, WA · 3,300 people · Surface Water Purchased AMES LAKE WATER ASSOC INC Redmond, WA · 3,224 people · Groundwater Snake River Housing Water System Yakima, WA · 3,036 people · Groundwater ASOTIN WATER DEPT Asotin, WA · 2,531 people · Groundwater PACIFIC BEACH/MOCLIPS Montesano, WA · 2,372 people · Groundwater VALLEY WATER SYSTEM Puyallup, WA · 2,259 people · Surface Water Purchased ALDERBROOK WATER CO UNION, WA · 2,154 people · Groundwater SKAGIT CO WATER DISTRICT #1 Mt Vernon, WA · 1,974 people · Groundwater Anacortes - Fidalgo Mt Vernon, WA · 1,890 people · Surface Water Purchased SUMMIT VIEW WATER SYSTEM Kennewick, WA · 1,869 people · Groundwater ROCKY POINT WATER DISTRICT 12 BREMERTON, WA · 1,831 people · Surface Water Purchased CARLSBORG LUD 10 12 13 14 Carlsborg, WA · 1,349 people · Groundwater ASHFORD WATER DISTRICT Ashford, WA · 1,141 people · Groundwater LAKE CUSHMAN SYSTEM 3 Hoodsport, WA · 917 people · Groundwater Admirals Cove Water District Freeland, WA · 870 people · Groundwater ALDERWOOD ESTATES Puyallup, WA · 635 people · Groundwater BYWATER BAY Port Townsend, WA · 628 people · Groundwater LACAMAS FARMSTEADS Tacoma, WA · 615 people · Groundwater RIDGE WATER ASSOCIATION Spokane, WA · 615 people · Groundwater SEABECK Poulsbo, WA · 610 people · Groundwater ALBION WATER DEPT Albion, WA · 600 people · Groundwater MCKENNA WATER DISTRICT MCKENNA, WA · 600 people · Groundwater ACME WATER DISTRICT NO 18 Acme, WA · 568 people · Groundwater NEWAUKUM HILL WATER ASSN CHEHALIS, WA · 493 people · Surface Water Purchased ARLENES ADDITION Burbank, WA · 480 people · Groundwater SKAGIT CO PUD - ALGER Mount Vernon, WA · 432 people · Groundwater ROYAL WATER DISTRICT Othello, WA · 430 people · Groundwater ALLYN SHOPPING CENTER Tacoma, WA · 414 people · Groundwater Parkwood MFD Housing Community SEQUIM, WA · 378 people · Groundwater ALMIRA WATER SYSTEM Almira, WA · 372 people · Groundwater LAZY C Port Townsend, WA · 367 people · Groundwater ALPINE HILLS Tacoma, WA · 363 people · Groundwater HIAPARK Port Orchard, WA · 360 people · Groundwater CANTERBROOK VILLAGE APARTMENTS Port Orchard, WA · 355 people · Groundwater LOST LAKE Port Orchard, WA · 328 people · Groundwater PORT GAMBLE Poulsbo, WA · 303 people · Groundwater ARTESIAN WATER DISTRICT 8 College Place, WA · 302 people · Groundwater DESERT CANYON DOMESTIC WATER SYSTEM Orondo, WA · 292 people · Groundwater PETERSON FARMS Woodland, WA · 290 people · Groundwater CAMANO HILLS WATER COMPANY INC Coupeville, WA · 286 people · Groundwater INDIAN HILLS ESTATES Poulsbo, WA · 282 people · Groundwater DEER MEADOWS WATER COMPANY INC Davenport, WA · 268 people · Groundwater GREEN ISLAND HILLS WATER ASSN Mt Vernon, WA · 265 people · Groundwater STEVENS CO PUD - ADDY Loon Lake, WA · 253 people · Groundwater PRAIRIE RIDGE 605 Lacey, WA · 250 people · Groundwater CRESCENT VIEW CONDOMINIUM OWNERS Quincy, WA · 243 people · Groundwater UTSALADY HEIGHTS OWNERS ASSN Mt Vernon, WA · 240 people · Groundwater RIDGEVIEW ESTATES WATER ASSOCIATION Moses Lake, WA · 240 people · Groundwater Ocean City Montesano, WA · 237 people · Groundwater MURDOCK WATER Dallesport, WA · 233 people · Groundwater COLUMBIA RIVERFRONT RV PARK Woodland, WA · 233 people · Groundwater FOUR SEASONS PARK SEQUIM, WA · 225 people · Groundwater CRISTALINA Tacoma, WA · 225 people · Groundwater GLEN COVE WATER INC. Gig Harbor, WA · 223 people · Groundwater GREEN BLUFF WATER ASSN Colbert, WA · 218 people · Groundwater Purchased AFC RANCH 1 Tonasket, WA · 217 people · Groundwater APPLE ACRES VILLAGE Yakima, WA · 212 people · Groundwater BABY ISLAND HEIGHTS WATER ASSOC FREELAND, WA · 211 people · Groundwater TEL COMPANY#1 Freeland, WA · 210 people · Groundwater Auburn Park Community LLC Port Orchard, WA · 202 people · Groundwater FINISTERRE HEIGHTS WATER SYSTEM Mt Vernon, WA · 193 people · Groundwater CEDAR RIDGE 617 Lacey, WA · 186 people · Groundwater ARROWHEAD BEACH COOP WATER ASSOC Mt Vernon, WA · 167 people · Groundwater NISQUALLY HIGHLANDS 364 Lacey, WA · 162 people · Groundwater CHUCKANUT TRAILS WATER SYSTEM BELLINGHAM, WA · 158 people · Groundwater SNOW CREEK Port Townsend, WA · 156 people · Groundwater EVERGREEN VALLEY Cle Elum, WA · 152 people · Groundwater PANORAMA MOBILE HOME PARK Colville, WA · 150 people · Groundwater DAYTON TRAILS Shelton, WA · 148 people · Groundwater MIDDLE FORK WATER & SEWER Chehalis, WA · 144 people · Groundwater GLENWOOD STATION Tacoma, WA · 144 people · Groundwater The Village at Colockum Ridge Quincy, WA · 144 people · Groundwater LITTLE TREE Tacoma, WA · 143 people · Groundwater DRIFTWOOD POINT WATER SYSTEM Gig Harbor, WA · 143 people · Groundwater VIEW RANCH ESTATES WATER ASSN Chehalis, WA · 141 people · Groundwater RACE LAGOON WATER ASSOCIATION Coupeville, WA · 141 people · Groundwater EAGLE VALLEY WATER SYSTEM Coupeville, WA · 135 people · Groundwater PLEASANT TIDES WATER CO OP Port Angeles, WA · 131 people · Groundwater AYOCK BEACH IMPROVEMENT Port Orchard, WA · 129 people · Groundwater AFC RANCH 2 Tonasket, WA · 125 people · Groundwater RAINIER TERRACE Port Orchard, WA · 125 people · Groundwater ALDERGROVE WATER ASSOC. Lynden, WA · 120 people · Groundwater CEDARWOOD SOUTH UNION ESTATES Tacoma, WA · 119 people · Groundwater TWANOH HEIGHTS COMMUNITY CLUB UNION, WA · 118 people · Groundwater NORTH SHORE ACRES GRAND COULEE, WA · 116 people · Groundwater THREE PONDS MOBILE PARK & APTS. Puyallup, WA · 113 people · Groundwater CENTURY WATER ASSOCIATION Lynden, WA · 110 people · Groundwater CHELAN CO PUD - CHELAN RIDGE Wenatchee, WA · 110 people · Groundwater ARCADIA ESTATES UNION, WA · 110 people · Groundwater CEDAR MOUNTAIN HOMEOWNERS ASSOC Port Orchard, WA · 106 people · Groundwater HOMESTEAD MOBILE HOME PARK Tonasket, WA · 105 people · Groundwater Ski Hill Domestic Water Association Cashmere, WA · 102 people · Groundwater AGATE WEST Freeland, WA · 100 people · Groundwater ARLINGTON EAST MUTUAL WATER ASSN. Arlington, WA · 100 people · Groundwater DUGGAN FALLS Port Orchard, WA · 100 people · Groundwater Northwest Water Coupeville, WA · 99 people · Groundwater MARBLE WATER SYSTEM Northport, WA · 94 people · Groundwater WOODARD PLACE Olympia, WA · 94 people · Groundwater ASPINWALL ESTATES Tacoma, WA · 93 people · Groundwater MULKEY MEADOWS 1 Port Orchard, WA · 93 people · Groundwater PROSPECT WATER ASSN INC Yakima, WA · 92 people · Groundwater COUNTRY MEADOWS Poulsbo, WA · 90 people · Groundwater GIFFORDS 685 Lacey, WA · 90 people · Groundwater LAKE MAYFIELD COMMUNITY CLUB Napavine, WA · 88 people · Groundwater M & R WATER CO LADY DAWN ESTATES LACEY, WA · 83 people · Groundwater ARDEN HILLS WATER SYSTEM Colville, WA · 80 people · Groundwater Peoples Creek Water System Monroe, WA · 76 people · Groundwater HEART O THE HILLS SEQUIM, WA · 76 people · Groundwater Hunt Community (Hunt I&II) Port Orchard, WA · 75 people · Groundwater MORNING MEADOWS Vancouver, WA · 75 people · Groundwater LENORA WATER AND SEWER DISTRICT USK, WA · 75 people · Groundwater STEVENS CO PUD - ECHO ESTATES Loon Lake, WA · 75 people · Groundwater ARLINGTON VIEW ESTATES WATER ASSOC Arlington, WA · 75 people · Groundwater HAYNES ACRES DIVISION 1 Olympia, WA · 74 people · Groundwater LOOKOUT POINT Tacoma, WA · 72 people · Groundwater RHODODENDRON PLACE UNION, WA · 70 people · Groundwater CARLSBORG MOBILE ESTATES SEQUIM, WA · 69 people · Groundwater HI VALLEY VIEW Yakima, WA · 67 people · Groundwater FAIRFIELD MHP Lynden, WA · 66 people · Groundwater Sylvan Terrace Condominiums Shelton, WA · 64 people · Groundwater LOS CEDROS MOBILE HOME PARK Port Orchard, WA · 63 people · Groundwater FOREST GLEN 762 Lacey, WA · 62 people · Groundwater ELWHA PLACE HOMEOWNERS ASSN PORT ANGELES, WA · 61 people · Groundwater TEEN CHALLENGE Spokane, WA · 61 people · Groundwater CURRIES LANDING Tacoma, WA · 61 people · Groundwater CITIZENS WATER ASSOCIATION Port Orchard, WA · 60 people · Groundwater WESTERN STAVIS WATER SYS II & III Poulsbo, WA · 60 people · Groundwater ADAMS RD COMMUNITY ASSN Coupeville, WA · 59 people · Groundwater SUNNYBANK WATER SYSTEM Cashmere, WA · 58 people · Surface Water TOWNSHIP PLACE Napavine, WA · 56 people · Groundwater MULFORD ESTATES Port Orchard, WA · 55 people · Groundwater APPLEWAY TRAILER COURT Tonasket, WA · 54 people · Groundwater WINDDRIFT WELL Tacoma, WA · 53 people · Groundwater HARBOR CREST Poulsbo, WA · 53 people · Groundwater EAGLE ESTATES Tacoma, WA · 53 people · Groundwater KAREN PLACE Tacoma, WA · 53 people · Groundwater ALPINE ACRES COMMUNITY ASSOCIATION Cashmere, WA · 51 people · Groundwater Tahja II Port Orchard, WA · 51 people · Groundwater

Washington Drinking Water: Frequently Asked Questions

Is Washington tap water safe to drink?

Washington has 150 community water systems regulated by the EPA serving 566,982+ residents. Water quality varies by system — search above to find your specific utility and see its violation history, lead test results, and safety grade.

How many water systems are in Washington?

There are 150 EPA-regulated community water systems in Washington serving 566,982+ residents. Each system is required to test for over 90 contaminants and publicly report any violations.

Does Washington have PFAS in its drinking water?

PFAS (forever chemicals) have been detected in water systems across the country, including Washington. The EPA finalized enforceable PFAS limits in 2024. Search for your specific water system above to see if PFAS were detected and whether levels exceed the new federal limits.

EPA data last updated: 2026-06-21