We found 248 public water systems that could serve the same population as Riverside Csd (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Eureka, City Of | Eureka | 27,950 | 18 | 1 |
| Humboldt C.s.d. | Cutten | 22,842 | 37 | 5 |
| Arcata, City Of | Arcata | 19,048 | 28 | 1 |
| Mckinleyville C.s.d. | Mckinleyville | 16,900 | 16 | 2 |
| Fortuna, City Of | Fortuna | 11,649 | 11 | 2 |
| Franklin K Lane Grove | County of Humboldt | 7,500 | 0 | 0 |
| Rio Dell, City Of | Rio Dell | 3,174 | 0 | 4 |
| Del Oro Water Co-ferndale | County of Humboldt | 1,998 | 0 | 0 |
| Fieldbrook Glendale C.s.d. | County of Humboldt | 1,927 | 0 | 1 |
| Willow Creek C.s.d. | Willow Creek | 1,710 | 0 | 1 |
| Calif. Parks & Recreation | County of Humboldt | 1,600 | 0 | 0 |
| Resort Imprvmt. Dist. #1 | County of Humboldt | 1,500 | 0 | 3 |
| Richardson Grove Sp-state Parks | County of Humboldt | 1,500 | 0 | 2 |
| Garberville Sanitary District | County of Humboldt | 1,500 | 0 | 1 |
| Redway C.s.d. | County of Humboldt | 1,500 | 0 | 3 |
| Fields Landing Water Works | County of Humboldt | 1,500 | 0 | 0 |
| Hydesville Co. W.d. | Hydesville | 1,409 | 0 | 5 |
| Blue Lake, City Of | Blue Lake | 1,252 | 0 | 1 |
| Gold Bluffs Beach Cg-state Parks | County of Humboldt | 1,020 | 0 | 1 |
| Manila Community Services Dist. | Arcata | 1,000 | 18 | 2 |
| Patrick's Point Sp-state Parks | County of Humboldt | 1,000 | 0 | 3 |
| Caltrans-trinidad Nb | County of Humboldt | 1,000 | 0 | 1 |
| Trinidad, City Of | Trinidad | 1,000 | 0 | 9 |
| Jacoby Creek Csd | County of Humboldt | 913 | 0 | 2 |
| Caltrans-trinidad Sb | County of Humboldt | 900 | 0 | 0 |
| Scotia Csd | County of Humboldt | 850 | 0 | 4 |
| Loleta C.s.d. | Loleta | 750 | 0 | 4 |
| Richardson Grove Campground & Rv Park | County of Humboldt | 750 | 0 | 22 |
| Csp Big Tree System | County of Humboldt | 742 | 0 | 0 |
| Orleans C.s.d. | County of Humboldt | 630 | 0 | 29 |
| Miranda C.s.d. | County of Humboldt | 600 | 0 | 7 |
| South Fork High School | County of Humboldt | 600 | 0 | 0 |
| Calif Parks & Recreation | County of Humboldt | 600 | 0 | 0 |
| Van Duzen - Humboldt Co. Parks | County of Humboldt | 550 | 0 | 1 |
| Prairie Creek Sp-state Parks | County of Humboldt | 500 | 0 | 0 |
| Westhaven Mwc | County of Humboldt | 500 | 0 | 0 |
| Westhaven C.s.d. | Trinidad | 490 | 0 | 9 |
| Orick C.s.d. | County of Humboldt | 450 | 0 | 11 |
| Stone Lagoon-state Parks | County of Humboldt | 400 | 0 | 2 |
| Myers Flat M.w.s. Inc. | County of Humboldt | 400 | 0 | 28 |
| Johnson Ranches, Inc | County of Humboldt | 390 | 0 | 0 |
| State Park Service | County of Humboldt | 369 | 0 | 0 |
| Weott C.s.d. | County of Humboldt | 364 | 0 | 42 |
| Hidden Springs Cg-state Parks | County of Humboldt | 350 | 0 | 0 |
| Palmer Creek Csd | County of Humboldt | 320 | 0 | 1 |
| A W Way - Humboldt Co. Parks | County of Humboldt | 300 | 0 | 7 |
| Big Lagoon - Humboldt Co. Parks | County of Humboldt | 300 | 0 | 0 |
| Phillipsville C.s.d. | County of Humboldt | 300 | 0 | 43 |
| Freshwater School | County of Humboldt | 300 | 0 | 0 |
| Redwood Trails Water System | County of Humboldt | 300 | 0 | 0 |
| Dean Creek Resort | County of Humboldt | 275 | 0 | 3 |
| Calif Parks & Recreation | County of Humboldt | 275 | 0 | 0 |
| California Redwood Co. - Korbel | County of Humboldt | 250 | 0 | 4 |
| Redwood Memorial Hospital | County of Humboldt | 250 | 0 | 0 |
| Larrupin Cafe | County of Humboldt | 247 | 0 | 19 |
| U.s. Forest Service | County of Humboldt | 225 | 0 | 0 |
| U.s. Forest Service | County of Humboldt | 225 | 0 | 0 |
| State Park Service | County of Humboldt | 225 | 0 | 0 |
| Alderpoint County Water | County of Humboldt | 219 | 0 | 50 |
| Sylvan Harbor Trailer Park | County of Humboldt | 210 | 0 | 6 |
| Chimney Tree | County of Humboldt | 200 | 0 | 30 |
| Founders Grove-state Parks | County of Humboldt | 200 | 0 | 4 |
| Burlington Cg-state Parks | County of Humboldt | 200 | 0 | 1 |
| Emerald Forest | County of Humboldt | 200 | 0 | 14 |
| Hansen's Wire Rope & Cafe | County of Humboldt | 200 | 0 | 0 |
| Cookson Ranch | County of Humboldt | 200 | 0 | 0 |
| Prairie Creek Motel | County of Humboldt | 200 | 0 | 0 |
| Angelina Inn | County of Humboldt | 200 | 0 | 0 |
| Freshwater Water Service | County of Humboldt | 200 | 0 | 0 |
| Fort Humboldt | County of Humboldt | 195 | 0 | 0 |
| Cal Fire-eel River Conservation Camp | County of Humboldt | 180 | 0 | 13 |
| Thunderbird Trailer Park Water | County of Humboldt | 170 | 0 | 0 |
| Cuddeback Grammar School | County of Humboldt | 165 | 0 | 10 |
| U.s. Forest Service | County of Humboldt | 165 | 0 | 0 |
| Grizzly Creek Sp-state Parks | County of Humboldt | 151 | 0 | 3 |
| Williams Grove - State Parks | County of Humboldt | 150 | 0 | 1 |
| Benbow W.c. | County of Humboldt | 150 | 0 | 33 |
| Larrupin' Cafe | County of Humboldt | 150 | 0 | 0 |
| Albee Creek Campground | County of Humboldt | 136 | 0 | 0 |
| Fish Lake Cg - Srnf | County of Humboldt | 130 | 0 | 2 |
| Cal Fire-high Rock Conservation Camp | County of Humboldt | 130 | 0 | 35 |
| Casterlin School | County of Humboldt | 130 | 0 | 27 |
| Midway Rv Park | County of Humboldt | 130 | 0 | 13 |
| Merryman's Restaurant | County of Humboldt | 125 | 0 | 6 |
| Heartwood Institute | County of Humboldt | 125 | 0 | 15 |
| Eel River Conservation Camp | County of Humboldt | 121 | 0 | 0 |
| Eel River Conservation Camp | County of Humboldt | 121 | 0 | 0 |
| Whitethorn Elementary School | County of Humboldt | 120 | 0 | 0 |
| Mobile Estates Fn | County of Humboldt | 120 | 0 | 0 |
| Mckinleyville Motel & Trailer | County of Humboldt | 120 | 0 | 0 |
| Sactish-chenone | County of Humboldt | 120 | 0 | 0 |
| Lundblade Water Company | County of Humboldt | 115 | 0 | 0 |
| Triumphant Life Camp | County of Humboldt | 112 | 0 | 0 |
| Big Lagoon Csd | County of Humboldt | 109 | 0 | 0 |
| Mattole Elementary School | County of Humboldt | 100 | 0 | 0 |
| Sounds Of The Seas W. S. | County of Humboldt | 100 | 0 | 0 |
| Redwood Empire G&cc | County of Humboldt | 100 | 0 | 0 |
| Redcrest Water Works | County of Humboldt | 100 | 0 | 0 |
| Ruth Lake Store | County of Humboldt | 100 | 0 | 0 |
| Bluff Creek Resort | County of Humboldt | 100 | 0 | 0 |
| California Redwood Co. - Brainard | County of Humboldt | 100 | 0 | 0 |
| Camp Mattole | County of Humboldt | 100 | 0 | 0 |
| Orleans Hotel | County of Humboldt | 100 | 0 | 0 |
| Forson Water Company | County of Humboldt | 100 | 0 | 0 |
| Firhaven Water | County of Humboldt | 100 | 0 | 0 |
| Stafford R V Park | County of Humboldt | 100 | 0 | 0 |
| Mad River Hatchery | County of Humboldt | 100 | 0 | 0 |
| Gambi Water System | County of Humboldt | 90 | 0 | 0 |
| Bull Creek Res And Trailer | County of Humboldt | 90 | 0 | 0 |
| Orleans Mutual Water Co. | County of Humboldt | 85 | 0 | 0 |
| Ridgetop Cafe | County of Humboldt | 85 | 0 | 0 |
| California Redwood Co.-orick | County of Humboldt | 80 | 0 | 0 |
| Singing Trees And Overpack's | County of Humboldt | 80 | 0 | 0 |
| Freshwater Park W.s. | County of Humboldt | 77 | 0 | 0 |
| Briceland C.s.d. | County of Humboldt | 75 | 0 | 0 |
| Waddington W.w. | County of Humboldt | 75 | 0 | 0 |
| Honeydew Country Store | County of Humboldt | 75 | 0 | 0 |
| Mattole Campground Blm | County of Humboldt | 75 | 0 | 0 |
| Big Lagoon Park Water Co. | County of Humboldt | 70 | 0 | 0 |
| Palm Motel And Cafe | County of Humboldt | 66 | 0 | 0 |
| Azalea Glen | County of Humboldt | 65 | 0 | 0 |
| Mill Creek M.w.c. | County of Humboldt | 65 | 0 | 0 |
| Palomino Estates M.w.c. | Garberville | 64 | 0 | 0 |
| U.s. Forest Service | County of Humboldt | 62 | 0 | 0 |
| Riverbend Mobile Home Park | County of Humboldt | 60 | 0 | 0 |
| Seawood Estates Mutual Water | County of Humboldt | 60 | 0 | 0 |
| Humboldt Fire Center | County of Humboldt | 60 | 0 | 0 |
| U.s. Forest Service | County of Humboldt | 60 | 0 | 0 |
| U.s. Forest Service | County of Humboldt | 60 | 0 | 0 |
| Humboldt Ecology Center | County of Humboldt | 60 | 0 | 0 |
| Thompson Campground | County of Humboldt | 60 | 0 | 0 |
| Mattole Triple Junction High School | County of Humboldt | 60 | 0 | 0 |
| Matilton Field | County of Humboldt | 60 | 0 | 0 |
| Riverdale Park | County of Humboldt | 57 | 0 | 0 |
| Midfield Mutual Water Company | County of Humboldt | 56 | 0 | 0 |
| Midfield Mutual Water Company | County of Humboldt | 56 | 0 | 0 |
| Philpot Campground | County of Humboldt | 55 | 0 | 0 |
| Ocean Grove Lodge | County of Humboldt | 53 | 0 | 0 |
| Van Duzen Resort | County of Humboldt | 51 | 0 | 0 |
| View Crest Lodge | County of Humboldt | 50 | 0 | 0 |
| Bridgeville Elem. School | County of Humboldt | 50 | 0 | 0 |
| Ancient Redwoods Resort | County of Humboldt | 50 | 0 | 0 |
| Beach Creek Mobile Home Park | County of Humboldt | 50 | 0 | 0 |
| Beginnings | County of Humboldt | 50 | 0 | 0 |
| Jack Norton School | County of Humboldt | 50 | 0 | 0 |
| W & W Water System | County of Humboldt | 50 | 0 | 0 |
| Dan Johnson | County of Humboldt | 50 | 0 | 0 |
| Cuneo Creek Group Campground | County of Humboldt | 50 | 0 | 0 |
| Larsen's Trailer Park | County of Humboldt | 50 | 0 | 0 |
| Dinsmore Lodge | County of Humboldt | 50 | 0 | 0 |
| Kneeland School | County of Humboldt | 48 | 0 | 0 |
| Whitethorn Construction | County of Humboldt | 45 | 0 | 0 |
| Elk Country Rv Resort And Campground | County of Humboldt | 45 | 0 | 0 |
| Kimtu Meadows Mwc | County of Humboldt | 41 | 0 | 0 |
| Elk River Scout Camp | County of Humboldt | 40 | 0 | 0 |
| Thunder Mountain W.a. | County of Humboldt | 40 | 0 | 0 |
| Hartsook Inn | County of Humboldt | 40 | 0 | 0 |
| Ming Tree Realty | County of Humboldt | 36 | 0 | 0 |
| Squires Water System | County of Humboldt | 36 | 0 | 0 |
| Ruby Valley Water | County of Humboldt | 36 | 0 | 0 |
| Usfs | County of Humboldt | 35 | 0 | 0 |
| U.s. Forest Service | County of Humboldt | 35 | 0 | 0 |
| Christine C Hadley | County of Humboldt | 35 | 0 | 0 |
| Al Jess, Inc. Water Company | County of Humboldt | 33 | 0 | 0 |
| Moonstone Heights Mwa | County of Humboldt | 31 | 0 | 0 |
| Maple Creek Elm. School | County of Humboldt | 31 | 0 | 0 |
| Boise Creek Cg-snrf | County of Humboldt | 30 | 0 | 0 |
| YELLOW ROSE | County of Humboldt | 30 | 0 | 0 |
| Ross Snyder | County of Humboldt | 30 | 0 | 0 |
| U.s. Forest Service | County of Humboldt | 30 | 0 | 0 |
| Marilann Court W.s. | County of Humboldt | 30 | 0 | 0 |
| Alton Tavern Water System | County of Humboldt | 30 | 0 | 0 |
| Trinity River Trailer Park | County of Humboldt | 30 | 0 | 0 |
| Tonita Wilson | County of Humboldt | 30 | 0 | 0 |
| Salmon Creek School | County of Humboldt | 30 | 0 | 0 |
| Pepperwood Falls Inn | County of Humboldt | 30 | 0 | 0 |
| M.f. Mitchell & Company | County of Humboldt | 28 | 0 | 0 |
| Bishop Pine Lodge | County of Humboldt | 28 | 0 | 0 |
| Thomas P Jordan | County of Humboldt | 27 | 0 | 0 |
| Riverside Acres | County of Humboldt | 27 | 0 | 0 |
| King Range Admin-blm | County of Humboldt | 25 | 0 | 0 |
| Howard & Linda Morris | County of Humboldt | 25 | 0 | 0 |
| U.s. Forest Service | County of Humboldt | 25 | 0 | 0 |
| Blair Fountain | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Swain S Flat Outpost | County of Humboldt | 25 | 0 | 0 |
| Judy's Market | County of Humboldt | 25 | 0 | 0 |
| Jordans Water System | County of Humboldt | 25 | 0 | 0 |
| T E Mathews | County of Humboldt | 25 | 0 | 0 |
| Greenpoint School | County of Humboldt | 25 | 0 | 0 |
| Wood Gulch Water System | County of Humboldt | 25 | 0 | 0 |
| Little Red Hen | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Chezem Rv Park | County of Humboldt | 25 | 0 | 0 |
| The Hideaway | County of Humboldt | 25 | 0 | 0 |
| Wailaki & Nadelos C.g. | County of Humboldt | 25 | 0 | 0 |
| Old West Cafe | County of Humboldt | 25 | 0 | 0 |
| Avenue Of The Giants Cafe | County of Humboldt | 25 | 0 | 0 |
| Patrick's Point Inn | County of Humboldt | 25 | 0 | 0 |
| Whitethorn Market | County of Humboldt | 25 | 0 | 0 |
| Bishop Pine Lodge | County of Humboldt | 25 | 0 | 0 |
| Hilltop Water System | County of Humboldt | 25 | 0 | 0 |
| Benbow Water System | County of Humboldt | 25 | 0 | 0 |
| Csp Trinidad State Beach | County of Humboldt | 25 | 0 | 0 |
| Csp Bull Creek Residence 14 | County of Humboldt | 25 | 0 | 0 |
| Beverly Drake | County of Humboldt | 25 | 0 | 0 |
| Grizzly Bluff School | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 25 | 0 | 0 |
| Usfs Mad River Cmp 10-54-1830 | County of Humboldt | 25 | 0 | 0 |
| Eucalyptus Motel | County of Humboldt | 24 | 0 | 0 |
| Honeydew Elementary School | County of Humboldt | 24 | 0 | 0 |
| Fern Springs Water Company | County of Humboldt | 24 | 0 | 0 |
| Arcata Redwood Co.-valley Green | County of Humboldt | 20 | 0 | 0 |
| R Place | County of Humboldt | 15 | 0 | 0 |
| Audrey's Water System | County of Humboldt | 12 | 0 | 0 |
| Tooby Lovejoy Spring | County of Humboldt | 6 | 0 | 0 |
| Martin And Shirley's Store | County of Humboldt | 4 | 0 | 0 |
| Petrolia Store | County of Humboldt | 3 | 0 | 0 |
| Prairie Creek Motel | County of Humboldt | 2 | 0 | 0 |
| Humboldt Bay Mwd | County of Humboldt | 0 | 16 | 0 |
| Blue Lake Mh Park | County of Humboldt | 0 | 0 | 0 |
| Azalea Mobile H.p. | County of Humboldt | 0 | 0 | 0 |
| Louisiana Pacific - Samoa | County of Humboldt | 0 | 0 | 0 |
| Seaview Mobile Home Estates | County of Humboldt | 0 | 0 | 0 |
| Green Diamond Resource Co.-big Lagoon | County of Humboldt | 0 | 0 | 0 |
| Bridgeville Water System | County of Humboldt | 0 | 0 | 0 |
| Kenmar Water Works | County of Humboldt | 0 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 0 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 0 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 0 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 0 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 0 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 0 | 0 | 0 |
| Usfs Six Rivers Nf | County of Humboldt | 0 | 0 | 0 |