County drinking water records
Marin County, CA drinking water systems
15 community water systems serve Marin County, CA, reporting 276,967 people served in all. A system that also serves other counties counts all of its customers here.
3 of them (20%) had at least one health-based violation in the last 10 years. 2 systems still have one unresolved.
6 rely mainly on groundwater and 9 on surface water, counting water bought from other systems.
Their lead service line inventories list 0 lead lines, 1 galvanized line that must be replaced and 757 lines of unknown material.
- Community water systems
- 15
- People served, sum of each system's own figure
- 276,967
- Systems with a health-based violation, last 10 years
- 3
- Systems with one unresolved
- 2
- Lead service lines in inventories
- 0
Water systems serving Marin County
15 systemsPeople served is each system's own figure for its whole service area. Violation counts cover the last 10 years of EPA records.
| System | Serves | People served | Main source | Health-based violations, 10 years | Unresolved | Lead lines |
|---|---|---|---|---|---|---|
| Marin Municipal Water District | San Rafael, Mill Valley and 19 more and land outside them | 186,895 | Surface water | 0 | 0 | 0 |
| North Marin Water District | Novato, Inverness and 2 more and land outside them | 61,691 | Surface water | 0 | 0 | 0 |
| NPS Ggnra | Outside cities and towns | 18,447 | Purchased surface water | 0 | 0 | 0 |
| Bolinas Community PUD | Bolinas | 2,483 | Surface water | 0 | 0 | 0 |
| North Marin WD - PT. Reyes | Point Reyes Station | 1,841 | Groundwater | 0 | 0 | 0 |
| NPS PRNS - Beaches | Outside cities and towns | 1,560 | Groundwater | 0 | 0 | 0 |
| Inverness Public Utility Dist | Inverness | 1,445 | Surface water | 0 | 1 | 0 |
| Lawson S Landing | Dillon Beach | 946 | Groundwater | 0 | 0 | 0 |
| Stinson Beach County Wtr Dist | Stinson Beach and land outside it | 583 | Surface water | 0 | 0 | 0 |
| Coast Springs - Cal. Water Service (Puc) | Dillon Beach | 388 | Surface water | 0 | 0 | 0 |
| Muir Beach Community | Muir Beach | 336 | Groundwater | 0 | 0 | 0 |
| Estero Mutual | Dillon Beach | 206 | Surface water | 3 | 0 | 0 |
| Green Gulch Farm | Outside cities and towns | 75 | Groundwater under direct influence | 1 | 2 | 0 |
| Nicasio Valley Ranch Mutual | Nicasio | 36 | Groundwater | 6 | 0 | 0 |
| Blue Mountain Center | Outside cities and towns | 35 | Groundwater | 0 | 0 | 0 |
Cities and towns in Marin County
30 places- Alto1 system
- Belvedere1 system
- Black Point-Green Point1 system
- Bolinas1 system
- Corte Madera1 system
- Dillon Beach3 systems
- Fairfax1 system
- Inverness2 systems
- Kentfield1 system
- Lagunitas-Forest Knolls1 system
- Larkspur1 system
- Lucas Valley-Marinwood1 system
- Marin City1 system
- Mill Valley1 system
- Muir Beach1 system
- Nicasio1 system
- Novato1 system
- Point Reyes Station2 systems
- Ross1 system
- San Anselmo1 system
- San Geronimo1 system
- San Rafael1 system
- Santa Venetia1 system
- Sausalito1 system
- Sleepy Hollow1 system
- Stinson Beach1 system
- Strawberry1 system
- Tamalpais-Homestead Valley1 system
- Tiburon1 system
- Woodacre1 system
Counties come from the counties EPA lists each system serving, matched to 2024 Census counties; where EPA lists none, from the county coded in the system's ID, its service area map, or its mailing address. A county holding at least a fifth of a system's service area map is added when at least a fifth of that map lies in those counties. Towns are the ones EPA lists and the Census places such a map covers, always inside those counties. In New England, where EPA's town names a whole Town, it is not matched to the village of the same name. A system is not listed in a county holding less than a fifth of its map, or in a county or town its map reaches when the map lies mostly outside the counties EPA lists, so a page can leave out a system that serves part of the area. Methodology and limitations