We found 144 public water systems in Multnomah county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Portland Water Bureau | County of Multnomah | 585,000 | 38 | 15 |
| Gresham, City Of | County of Multnomah | 73,932 | 21 | 19 |
| Rockwood Pud | Portland | 61,082 | 21 | 68 |
| Powell Valley Road Wd | County of Multnomah | 39,000 | 0 | 0 |
| Troutdale, City Of | Troutdale | 16,020 | 55 | 37 |
| Parkrose Water District | County of Multnomah | 13,800 | 0 | 0 |
| Fairview, City Of | County of Multnomah | 9,176 | 0 | 91 |
| Rose City Water District | County of Multnomah | 7,500 | 0 | 0 |
| Gilbert Water District | County of Multnomah | 4,925 | 0 | 0 |
| Pacific Power & Light Co | County of Multnomah | 4,505 | 0 | 0 |
| Wood Village, City Of | County of Multnomah | 3,907 | 0 | 21 |
| Hazelwood Water District | County of Multnomah | 3,750 | 0 | 0 |
| Richland Water District | County of Multnomah | 3,500 | 0 | 0 |
| Corbett Water District | County of Multnomah | 3,300 | 0 | 114 |
| Usfs Multnomah Falls/wahkeena | County of Multnomah | 3,200 | 0 | 25 |
| Capitol Highway Water District | County of Multnomah | 3,075 | 0 | 0 |
| Coe Bonneville Dam | County of Multnomah | 2,000 | 0 | 0 |
| Jantzen Beach Water Company | County of Multnomah | 2,000 | 0 | 0 |
| Fairview | Fairview | 2,000 | 0 | 0 |
| Community Water Company | County of Multnomah | 1,700 | 0 | 0 |
| Sylvan Water District | County of Multnomah | 1,515 | 0 | 0 |
| Pleasant Home Water District | County of Multnomah | 1,510 | 0 | 11 |
| Palatine Hill Water District | County of Multnomah | 1,500 | 0 | 10 |
| Lusted Water District | County of Multnomah | 1,200 | 0 | 24 |
| Valley View Water District | County of Multnomah | 1,034 | 0 | 9 |
| Hayden Island Trailer Park | County of Multnomah | 900 | 0 | 0 |
| Argay Park | County of Multnomah | 900 | 0 | 0 |
| Reynolds Metal Company | County of Multnomah | 850 | 0 | 0 |
| Metro Parks - Oxbow | County of Multnomah | 822 | 0 | 4 |
| Darlington Water District | County of Multnomah | 800 | 0 | 0 |
| Portland Mobile Home Court | County of Multnomah | 800 | 0 | 0 |
| Pleasant Valley School Sd 28j | County of Multnomah | 650 | 0 | 72 |
| Columbia Edgewater Countryclub | County of Multnomah | 641 | 0 | 0 |
| Metro Parks - Blue Lake | County of Multnomah | 600 | 0 | 0 |
| Rolling Hills Mobil Manor | County of Multnomah | 550 | 0 | 0 |
| Oprd Benson State Park | County of Multnomah | 523 | 0 | 0 |
| Oprd Lewis & Clark State Park | County of Multnomah | 400 | 0 | 21 |
| Interlachen Water Pud | County of Multnomah | 360 | 0 | 88 |
| Mobile Estates Corp Trailer Pk | County of Multnomah | 350 | 0 | 0 |
| Burlington Water District | County of Multnomah | 340 | 0 | 11 |
| City Bible Church | County of Multnomah | 300 | 0 | 192 |
| Van's Drive Inn, %a.e.purdy | County of Multnomah | 300 | 0 | 0 |
| Mobile Village | County of Multnomah | 300 | 0 | 0 |
| Mobile Estates Corp Trailer Pk | County of Multnomah | 300 | 0 | 0 |
| Vans Drive In | County of Multnomah | 300 | 0 | 0 |
| Portland Mh Park-north | County of Multnomah | 300 | 0 | 0 |
| Rolling Hills Trailer Park | County of Multnomah | 300 | 0 | 0 |
| Portland Mh Park-south | County of Multnomah | 300 | 0 | 0 |
| Usfs Eagle Creek Cg | County of Multnomah | 255 | 0 | 13 |
| Skyline Elementary Sd 1j | County of Multnomah | 250 | 0 | 37 |
| Townsend Farms Fairview | County of Multnomah | 250 | 0 | 151 |
| Camp Collins Ymca | County of Multnomah | 250 | 0 | 7 |
| Means Kitchen | County of Multnomah | 250 | 0 | 0 |
| Heron Lakes Golf Course | County of Multnomah | 250 | 0 | 0 |
| Sandy Blvd Mobile Villa Inc | County of Multnomah | 250 | 0 | 0 |
| Wood Village Mobile Home Park | County of Multnomah | 250 | 0 | 0 |
| Sandy Boulevard Mobile Villa | County of Multnomah | 225 | 0 | 68 |
| Lorna Portland Water Llc | County of Multnomah | 200 | 0 | 39 |
| Central Church Of The Nazarene | County of Multnomah | 200 | 0 | 36 |
| Clear Creek Church | County of Multnomah | 200 | 0 | 5 |
| Springers Flea Market | County of Multnomah | 200 | 0 | 0 |
| Terrand Mob Home %r.mccurdy | County of Multnomah | 200 | 0 | 0 |
| Columbia Gorge Restaurant | County of Multnomah | 200 | 0 | 0 |
| Sauvie Island School | County of Multnomah | 175 | 0 | 56 |
| La Mesa | County of Multnomah | 175 | 0 | 0 |
| Bedford Park Mutual Wtr Co | Florence Cole | 163 | 0 | 0 |
| Cracker Barrel Grocery | County of Multnomah | 150 | 0 | 9 |
| Siegler Cove Marina | County of Multnomah | 150 | 0 | 147 |
| Trout Creek Bible Camp | County of Multnomah | 150 | 0 | 12 |
| Alpenrose Dairy | County of Multnomah | 150 | 0 | 84 |
| Oprd Ainsworth State Park | County of Multnomah | 150 | 0 | 27 |
| Cherry Blossom Mobile Home Pk | County of Multnomah | 150 | 0 | 0 |
| Apostolic Faith Camp | County of Multnomah | 150 | 0 | 0 |
| Jordan Creek Inn | County of Multnomah | 150 | 0 | 0 |
| ZIMS COUNTRY CAFE | County of Multnomah | 140 | 0 | 0 |
| Suburban Mobile Estates | County of Multnomah | 135 | 0 | 0 |
| West Interlachen Water Co-op | County of Multnomah | 135 | 0 | 0 |
| Rocky Pointe Marina | County of Multnomah | 125 | 0 | 170 |
| Usfs Larch Mountain | Mt Hood Nf | 116 | 0 | 0 |
| Burnside Rocket | County of Multnomah | 110 | 0 | 0 |
| Coe Bonneville Dam | County of Multnomah | 109 | 0 | 0 |
| Tads Chicken N Dumplins | County of Multnomah | 100 | 0 | 0 |
| Mobile Village Inc | County of Multnomah | 100 | 0 | 0 |
| Reeder Beach Resort | County of Multnomah | 100 | 0 | 0 |
| Oprd Bridal Veil Falls St Park | County of Multnomah | 100 | 0 | 0 |
| Portland Habilitation Center | County of Multnomah | 100 | 0 | 0 |
| Springdale Union 76 | County of Multnomah | 100 | 0 | 0 |
| Lower Corbett Store | County of Multnomah | 100 | 0 | 0 |
| Portland Airport Ws-port Of Pd | County of Multnomah | 100 | 0 | 0 |
| Sunset Gables Conference Ctr. | Caretaker | 100 | 0 | 0 |
| Awful Bros-%harris Enterprises | County of Multnomah | 100 | 0 | 0 |
| Armour & Company | County of Multnomah | 100 | 0 | 0 |
| Foster Poultry Farms | County of Multnomah | 100 | 0 | 0 |
| Sauvie Island Moorage | County of Multnomah | 96 | 0 | 0 |
| Oprd Guy W Talbot Sp | County of Multnomah | 90 | 0 | 0 |
| Faubion Summer Hm Assoc% Jones | County of Multnomah | 82 | 0 | 0 |
| Wild Wood Golf Course | County of Multnomah | 82 | 0 | 0 |
| Plainview Grocery | County of Multnomah | 75 | 0 | 0 |
| Big Eddy Marina | County of Multnomah | 75 | 0 | 0 |
| Lakeside Gardens Restaurant | County of Multnomah | 75 | 0 | 0 |
| Casselmans Wharf | County of Multnomah | 74 | 0 | 0 |
| Terrand Mobile Terrace | County of Multnomah | 71 | 0 | 0 |
| Edgefield Children's Home | County of Multnomah | 60 | 0 | 0 |
| Bailey Nursery Reeder Rd Main | County of Multnomah | 54 | 0 | 0 |
| Pleasant Valley Market | County of Multnomah | 50 | 0 | 0 |
| Multnomah Falls Lodge & Rest | County of Multnomah | 50 | 0 | 0 |
| Hagars At Viking Park | County of Multnomah | 50 | 0 | 0 |
| Tippy Canoe | County of Multnomah | 50 | 0 | 0 |
| Scenic Fruit Company | County of Multnomah | 50 | 0 | 0 |
| Foremost Dairy | County of Multnomah | 50 | 0 | 0 |
| Alder Creek Lumber Co Inc | County of Multnomah | 50 | 0 | 0 |
| Club Paesano Cedarville Park | County of Multnomah | 43 | 0 | 0 |
| Frank Calcagno | County of Multnomah | 40 | 0 | 0 |
| Ruby's Tavern | County of Multnomah | 40 | 0 | 0 |
| Osborne Water System% P Schatz | Troutdale | 37 | 0 | 0 |
| Butler Road Community Wtr Sys | Ralph Clinton | 35 | 0 | 0 |
| Ash Grove Cement West-rvrgate | County of Multnomah | 32 | 0 | 0 |
| Golden Spike Motel | County of Multnomah | 30 | 0 | 0 |
| Fireside Center | County of Multnomah | 30 | 0 | 0 |
| Hillsview Store,% K.schrepping | County of Multnomah | 30 | 0 | 0 |
| Odot Hd Bridal Veil St Pk | Bridal Veil | 30 | 0 | 0 |
| Pioneer Motel | County of Multnomah | 30 | 0 | 0 |
| Trails Club Of Or-nesika Lodge | County of Multnomah | 30 | 0 | 0 |
| Mayfair Moorage Inc | Portland | 28 | 0 | 0 |
| Usfs Columbia Gorge Rs | Mt Hood Nf | 26 | 0 | 0 |
| 240th Pl Comm Well-sw Mckenzie | Gresham | 26 | 0 | 0 |
| Stauffer Chemical Company | County of Multnomah | 25 | 0 | 0 |
| Moore International % M. Force | County of Multnomah | 25 | 0 | 0 |
| Boeing Of Portland %l S Lewis | County of Multnomah | 25 | 0 | 0 |
| Mt Shadows Cottages | County of Multnomah | 25 | 0 | 0 |
| Usfs Troutdale Fire Cache | Mt Hood Nf | 25 | 0 | 0 |
| Mayfair Moorage Inc | County of Multnomah | 24 | 0 | 0 |
| Latourell Falls Township | County of Multnomah | 24 | 0 | 0 |
| Lynch Water Co-op Inc | County of Multnomah | 24 | 0 | 0 |
| Marshall Beach Estates | County of Multnomah | 22 | 0 | 0 |
| Bonneville Elementary, Sd 46 | County of Multnomah | 21 | 0 | 0 |
| Florence Park Motel | County of Multnomah | 20 | 0 | 0 |
| Sundial Marine Cons & Repair | County of Multnomah | 10 | 0 | 0 |
| Gorgery Restaurant | County of Multnomah | 10 | 0 | 0 |
| Knaupp's Country Fudge | County of Multnomah | 10 | 0 | 0 |
| Bridal Veil Water System | County of Multnomah | 9 | 0 | 0 |
| Big Oak Marina | County of Multnomah | 5 | 0 | 0 |
| Unknown Test System | County of Multnomah | 5 | 0 | 0 |
| Hall Of Fame Test System | County of Multnomah | 5 | 0 | 0 |