We found 102 public water systems in Marin county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Marin Municipal Water District | Corte Madera | 189,400 | 72 | 0 |
| North Marin Water District | Novato | 61,500 | 39 | 1 |
| Csp - Angel Island St Park | County of Marin | 2,000 | 0 | 0 |
| Larry Bass | County of Marin | 2,000 | 0 | 0 |
| Larry Bass | County of Marin | 2,000 | 0 | 0 |
| North Marin Wd - Pt. Reyes | County of Marin | 1,700 | 0 | 1 |
| Bolinas Community Pud | County of Marin | 1,620 | 0 | 53 |
| Stinson Beach County Wtr Dist | County of Marin | 1,500 | 0 | 3 |
| Inverness Public Utility Dist | County of Marin | 1,304 | 0 | 29 |
| Nps Prns - Glen And Wildcat Campgrounds | County of Marin | 1,200 | 0 | 14 |
| Nps Prns - Lighthouse | County of Marin | 1,200 | 0 | 2 |
| Lawson S Landing | County of Marin | 894 | 0 | 7 |
| Csp - Mt Tam Theatre Well | County of Marin | 500 | 0 | 1 |
| Csp - Tomales Bay St Park | County of Marin | 500 | 0 | 1 |
| Lawsons Landing | County of Marin | 500 | 0 | 0 |
| Elk Creek Community Services D | County of Marin | 450 | 0 | 0 |
| Fairview School | County of Marin | 391 | 0 | 0 |
| William G Landry | County of Marin | 340 | 0 | 0 |
| Nps Prns - Laguna System | County of Marin | 300 | 0 | 3 |
| Csp - Samuel Taylor St Park | County of Marin | 300 | 0 | 2 |
| Paul Bringgs | County of Marin | 300 | 0 | 0 |
| Tomales Elem & Middle School | County of Marin | 265 | 0 | 4 |
| Skywalker Ranch | County of Marin | 250 | 0 | 1 |
| Tomales High School | County of Marin | 227 | 0 | 2 |
| Walker Creek Ranch Educational Center | County of Marin | 212 | 0 | 8 |
| Coast Springs - Cal. Water Service (puc) | San Jose | 210 | 0 | 11 |
| Nps Prns - Five Brooks | County of Marin | 200 | 0 | 2 |
| Nps Ggnra | County of Marin | 200 | 0 | 10 |
| Jakc Helvie | County of Marin | 200 | 0 | 0 |
| Nunzio Femino | County of Marin | 200 | 0 | 0 |
| Nps Prns - Five Brooks | County of Marin | 200 | 0 | 0 |
| Dominican College | County of Marin | 200 | 0 | 0 |
| Hog Island Oyster Co. | County of Marin | 170 | 0 | 0 |
| Junco Moible Home Park | County of Marin | 165 | 0 | 0 |
| Artois Csd | County of Marin | 150 | 0 | 0 |
| Marconi Inconference Center | County of Marin | 150 | 0 | 0 |
| Plaskett Recreational Area | County of Marin | 140 | 0 | 0 |
| Marin French Cheese Co | County of Marin | 128 | 0 | 1 |
| Estero Mutual | County of Marin | 125 | 0 | 50 |
| Kanawha Village Mhp | County of Marin | 125 | 0 | 0 |
| Ollie Frazier | County of Marin | 125 | 0 | 0 |
| Csp - Marconi Conference Center | County of Marin | 120 | 0 | 0 |
| Chuck Harris, Sr | County of Marin | 108 | 0 | 0 |
| Tony S Seafood Restaurant | County of Marin | 103 | 0 | 0 |
| Camp Tamarancho | County of Marin | 100 | 0 | 0 |
| Piezzi Building | County of Marin | 100 | 0 | 0 |
| William Tell House | County of Marin | 100 | 0 | 0 |
| Nicasio Ranch Llc | County of Marin | 100 | 0 | 0 |
| Flying J | County of Marin | 100 | 0 | 0 |
| Angel S Cafe | County of Marin | 100 | 0 | 0 |
| Bothin Youth Center | County of Marin | 100 | 0 | 0 |
| Nick's Cove | County of Marin | 90 | 0 | 0 |
| Chuck Stout | County of Marin | 90 | 0 | 0 |
| Green Gulch Farm | County of Marin | 75 | 0 | 0 |
| Csp - Mt Tam East Peak System | County of Marin | 75 | 0 | 0 |
| Tomales Church Of The Assumption | County of Marin | 75 | 0 | 0 |
| Black Butte Mobile Home Park | County of Marin | 75 | 0 | 0 |
| Nps Prns - Sky Camp Campground | County of Marin | 75 | 0 | 0 |
| Nicasio School | County of Marin | 70 | 0 | 0 |
| Bayliss School | County of Marin | 69 | 0 | 0 |
| Synanon Walker Creek Settlemen | County of Marin | 65 | 0 | 0 |
| Devil's Gulch Ranch Water System | County of Marin | 60 | 0 | 0 |
| Eugene Unruh | County of Marin | 60 | 0 | 0 |
| Nps Prns - Beaches | County of Marin | 55 | 0 | 0 |
| Artois School | County of Marin | 54 | 0 | 0 |
| Nicasio Valley Ranch Mutual | County of Marin | 51 | 0 | 0 |
| Lake School | County of Marin | 51 | 0 | 0 |
| Maif - Marshall Aqua Improvement Forum | County of Marin | 50 | 0 | 0 |
| Audubon Canyon Ranch - Mgp Picher | County of Marin | 50 | 0 | 0 |
| Audubon Canyon Ranch - Mgp Volunteer | County of Marin | 50 | 0 | 0 |
| Marie Lacque | County of Marin | 50 | 0 | 0 |
| George Ward | County of Marin | 50 | 0 | 0 |
| U.s. Coast Guard - Pt. Reyes | County of Marin | 50 | 0 | 0 |
| Donnie R Walker | County of Marin | 49 | 0 | 0 |
| Wm G Lopachuck | County of Marin | 49 | 0 | 0 |
| Anita Fernandez | County of Marin | 45 | 0 | 0 |
| Mcevoy Ranch Water System | County of Marin | 41 | 0 | 0 |
| John Maderious | County of Marin | 40 | 0 | 0 |
| Blue Mountain Center | County of Marin | 35 | 0 | 0 |
| Marshall Boat Works | County of Marin | 33 | 0 | 0 |
| Blue Gum Motel | County of Marin | 32 | 0 | 0 |
| Koa Green Acres Park | County of Marin | 30 | 0 | 0 |
| Ice Springs Administrative Sit | County of Marin | 30 | 0 | 0 |
| Drakes Bay Oyster Company | County of Marin | 30 | 0 | 0 |
| Herald Smith | County of Marin | 29 | 0 | 0 |
| Shoreline School Dist: Bus Garage | County of Marin | 26 | 0 | 0 |
| Slide Ranch | County of Marin | 25 | 0 | 0 |
| Diekmann's General Store | County of Marin | 25 | 0 | 0 |
| Alder Springs Center | County of Marin | 25 | 0 | 0 |
| Wayne Davis | County of Marin | 25 | 0 | 0 |
| Blue Mountain Center | County of Marin | 25 | 0 | 0 |
| Audubon Canyon Ranch | County of Marin | 25 | 0 | 0 |
| Audubon Volunteer Canyon | County of Marin | 25 | 0 | 0 |
| Bothin Youth Center | County of Marin | 25 | 0 | 0 |
| Marshall Tavern | County of Marin | 25 | 0 | 0 |
| Alta Mira Hotel | County of Marin | 25 | 0 | 0 |
| Nicasio Valley Ranch Mutual Water Co. | County of Marin | 25 | 0 | 0 |
| Bulltail Ranch | County of Marin | 25 | 0 | 0 |
| Duck Cove Water System | County of Marin | 12 | 0 | 0 |
| Glenn Colusa Irrigation District | County of Marin | 11 | 0 | 0 |
| Jensen Oyster Company | County of Marin | 1 | 0 | 0 |
| De Vor Nurseries | County of Marin | 0 | 0 | 0 |