Public Water Systems
4,557 active public water systems in WA, tracked from EPA's Safe Drinking Water Information System (SDWIS) across all 50 states. See our methodology.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Monterra | Sequim, WA | 464 | 25 | - |
| Littlerock Elementary | Tumwater, WA | 463 | 33 | - |
| Lake Alyson | Freeland, WA | 463 | 13 | - |
| Kittitas County Water District #7 | CLe elum, WA | 463 | 21 | - |
| Dungeness Bay Plat | Sequim, WA | 461 | 6 | - |
| Hartstene Pointe | Shelton, WA | 460 | 20 | - |
| Penn Cove Water and Sewer District | Oak Harbor, WA | 460 | 37 | - |
| Wilkshire Lane Water District Inc | Arlington, WA | 460 | 6 | - |
| Dugualla Community Inc | Oak Harbor, WA | 459 | 6 | - |
| Chehalis Livestock Auction & Cafe | Chehalis, WA | 457 | 11 | - |
| Wandering Creek Homeowners Assoc | Bothell, WA | 457 | 5 | - |
| Cresap Bay Park and Campground | Woodland, WA | 456 | 5 | - |
| Chinook Estates | Puyallup, WA | 455 | 10 | - |
| Thunderbird Park | Monsey, WA | 454 | 94 | - |
| Black Diamond Water District | Port Angeles, WA | 452 | 98 | - |
| Finley Elementary School (New) | Cle Elum, WA | 450 | 33 | - |
| Country Manor Mobile Home Park | Port Orchard, WA | 450 | 23 | - |
| Delta Water Association | Lynden, WA | 450 | 492 | - |
| Vaughn Elementary School | Gig Harbor, WA | 450 | 2 | - |
| Maple Lane Behavioral Health | Centralia, WA | 450 | 56 | - |
| Panorama Point Campground | Enumclaw, WA | 450 | 10 | - |
| Carrolls Water Assn | Napavine, WA | 449 | 238 | - |
| Port of Royal Slope | Royal City, WA | 447 | 76 | - |
| Rosedale Heights Trailer Park | Tacoma, WA | 444 | 11 | - |
| Bevin Lake Rest Area | Chehalis, WA | 443 | 9 | - |
| Pioneer Water Company | Marshall, WA | 443 | 46 | - |
| Villa Grove | Olympia, WA | 442 | 51 | - |
| Doe Bay Water Users Assoc | Eastsound, WA | 442 | 66 | - |
| Bridgeport State Park | Pateros, WA | 441 | 15 | - |
| Grace Bible Church | Port Orchard, WA | 436 | 1 | - |
| Combined Water System | Coupeville, WA | 435 | 62 | - |
| Maplewood Addition Water Coop | Renton, WA | 435 | 80 | - |
| Ryderwood Improvement & Service As | Kelso, WA | 434 | 95 | - |
| Four Lakes Water District 10 | Four Lakes, WA | 433 | 22 | - |
| Skagit Co PUD - Alger | Mount Vernon, WA | 432 | 16 | - |
| HMC Management Water System | Port Orchard, WA | 432 | 22 | - |
| Seven Bays Estates Unlimited | Marshall, WA | 431 | 31 | - |
| Craven Farm Water System | Snohomish, WA | 431 | 9 | - |
| Royal Water District | Othello, WA | 430 | 75 | - |
| Echo Glen Childrens Center | Snoqualmie, WA | 430 | 115 | - |
| Riverside Town Of | Riverside, WA | 429 | 111 | - |
| Saratoga Beach Owners Assn | Freeland, WA | 425 | 10 | - |
| Silver Lake Water | Freeland, WA | 425 | 9 | - |
| Hawley Hills 686 | Lacey, WA | 425 | 14 | - |
| Cispus Environmental Center | Randle, WA | 423 | 16 | - |
| Crosswoods Water Company | Coupeville, WA | 420 | 9 | - |
| Index Water Dept | Index, WA | 420 | 130 | - |
| Big Bend Landowners Association | Monroe, WA | 419 | 194 | - |
| Henderson Boulevard | Tacoma, WA | 418 | 19 | - |
| Miracle Ranch | Gig Harbor, WA | 418 | 21 | - |