Public water system · 090605174
ActiveGraton Resort and Casino
At a glance
Graton Resort and Casino (PWSID 090605174) is an active non-transient non-community water system in California. It reports serving 10,127 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as Native American-owned. EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
10,127
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Graton Resort and Casino compare with other water systems in California?
By EPA's size categories, Graton Resort and Casino is a large system (10,001 to 100,000 people). Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Graton Resort and Casino is about 24 times that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. California has 1,466 active non-transient non-community water systems, 20% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Graton Resort and Casino?
EPA lists Graton Resort and Casino as Native American-owned. The EPA Region 09 is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act.
Does Graton Resort and Casino have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 2014. The violations listed here began between January 2014 and January 2014. By type: 3 monitoring and reporting. The contaminants or rules involved are Lead and Copper Rule, Haloacetic acids (HAA5) and Total trihalomethanes (TTHM). EPA lists 3 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2014-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
All 3 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Graton Resort and Casino: frequently asked questions
Who runs Graton Resort and Casino?
Graton Resort and Casino (PWSID 090605174) is a non-transient non-community water system Native American-owned. It is regulated by the EPA Region 09.
How many people does Graton Resort and Casino serve?
Graton Resort and Casino reports serving 10,127 people through 1 service connection in California.
Where does Graton Resort and Casino get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Graton Resort and Casino have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 2014. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Graton Resort and Casino's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 2014. For current results, consult EPA ECHO, or the EPA Region 09.
Where can I find Graton Resort and Casino's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Graton Resort and Casino is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in California
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Los Angeles-City, Dept. of Water & Power | Los Angeles | 3,875,566 | Community | Surface water |
| East Bay MUD | Alameda | 1,442,800 | Community | Surface water |
| San Diego, City of | San Diego | 1,385,379 | Community | Surface water |
| San Jose Water | Santa Clara | 1,039,920 | Community | Surface water |
| Sfpuc City Distribution Division | San Francisco | 848,019 | Community | Purchased surface water |
| Eastern Municipal Wd | Riverside | 666,581 | Community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Graton Resort and Casino, PWSID 090605174, California”, https://aquacensus.com/water-systems/california/graton-resort-and-casino-090605174 (data as of October 1, 2026).