Public water system · 090605004
ActiveGrindstone Rancheria
Community water system in California, drawing primarily on surface water.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
150
Service connections
58
Primary source
SW
Surface water
System type
CWS
Community water system
System record
Violations & enforcement
| Began | Violation | Contaminant | Health-based | Status |
|---|---|---|---|---|
| 2025-12-01 | 36 | 0200 | No | Archived |
| 2025-11-01 | 36 | 0200 | No | Archived |
| 2025-10-01 | 36 | 0200 | No | Archived |
| 2025-09-01 | 36 | 0200 | No | Archived |
| 2025-08-01 | 36 | 0200 | No | Archived |
| 2025-07-01 | 36 | 0200 | No | Archived |
| 2025-06-01 | 36 | 0200 | No | Archived |
| 2025-05-01 | 36 | 0200 | No | Archived |
| 2025-04-01 | 36 | 0200 | No | Archived |
| 2025-03-01 | 3A | 8000 | No | Resolved |
| 2025-03-01 | 36 | 0200 | No | Archived |
| 2025-02-01 | 36 | 0200 | No | Archived |
Grindstone Rancheria: frequently asked questions
Is Grindstone Rancheria's water safe to drink?
Grindstone Rancheria is an active community water system regulated under the Safe Drinking Water Act, overseen by the EPA Region 09. EPA SDWA violation and enforcement records for this system are being added to AquaCensus from EPA ECHO; consult EPA ECHO or your annual Consumer Confidence Report for its current compliance status.
Who runs Grindstone Rancheria?
Grindstone Rancheria (PWSID 090605004) is a native american-owned community water system, regulated by the EPA Region 09.
How many people does Grindstone Rancheria serve?
Grindstone Rancheria reports serving 150 people through 58 service connections in California.
Where does Grindstone Rancheria get its water?
EPA SDWIS lists this system's primary water source as surface water.
Other water systems in California
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| New York City System | Richmond | 8,271,000 | Community | Surface water |
| Los Angeles-City, Dept. of Water & Power | Los Angeles | 7,751,132 | Community | Surface water |
| City of Houston | Harris | 2,970,543 | Community | Surface water |
| Chicago | Cook | 2,746,388 | Community | Surface water |
| MWRA | Suffolk | 2,660,000 | Community | Surface water |
| Mdwasa - Main System | Miami-Dade | 2,377,460 | Community | Groundwater |