Water quality in Loma Mar, California
Loma Mar is in San Mateo County. 51 active public water systems serve the county; 15 had an EPA violation in the past three years.
Most likely your provider
Other community water systems in San Mateo County
35 systems, nearest firstNon-community systems in San Mateo County (15: schools, campgrounds, workplaces, restaurants)
These systems serve places you visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
San Mateo County Memorial Park |
1,790 | 0 | 0 | |
|
Optimists Volunteers for Youth |
205 | 1 | 0 | |
|
Butano Girl Scout Camp |
154 | 0 | 0 | |
|
Harley Farms Goat Dairy |
113 | 0 | 0 | |
|
Butano State Park Csp |
121 | 0 | 0 | |
|
LA Honda Center |
33 | 0 | 0 | |
|
Csp Portola State Park |
172 | 0 | 0 | |
|
San Gregorio Company |
32 | 1 | 0 | |
|
Gazos Creek Beach House |
33 | 0 | 0 | |
|
Pigeon Point Hostel |
67 | 1 | 1 | |
|
Costanoa Campground |
33 | 1 | 0 | |
|
Martins Beach Water System |
49 | 1 | 0 | |
|
Csp Ano Nuevo State Park |
709 | 0 | 0 | |
|
UC Elkus Ranch |
34 | 0 | 0 | |
|
Skylawn Memorial Park (skylawn Inc) |
50 | 1 | 1 |
About this data
Water systems are matched to San Mateo County, nearest to Loma Mar first. Your exact provider depends on your address and connection; the largest community water system in a county is usually the city or town utility. Distances are measured to the centre of the service area EPA publishes for the system.
Town locations and ZIP code areas come from U.S. Census Bureau 2020 files.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The California records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.