Public water system · 090600054
ActiveSanta Ysabel Enterprise System
At a glance
Santa Ysabel Enterprise System (PWSID 090600054) is an active non-transient non-community water system in California. It reports serving 510 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as Native American-owned. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in February 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
510
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Santa Ysabel Enterprise System compare with other water systems in California?
By EPA's size categories, Santa Ysabel Enterprise System is a small system (501 to 3,300 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 Santa Ysabel Enterprise System is about 19% above 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 Santa Ysabel Enterprise System?
EPA lists Santa Ysabel Enterprise System 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 Santa Ysabel Enterprise System have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in February 2026. The violations listed here began between October 2009 and February 2026. By type: 1 reporting, 1 monitoring, 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 3 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-02-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Unaddressed |
| 2024-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 4 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.
Santa Ysabel Enterprise System: frequently asked questions
Who runs Santa Ysabel Enterprise System?
Santa Ysabel Enterprise System (PWSID 090600054) is a non-transient non-community water system Native American-owned. It is regulated by the EPA Region 09.
How many people does Santa Ysabel Enterprise System serve?
Santa Ysabel Enterprise System reports serving 510 people through 1 service connection in California.
Where does Santa Ysabel Enterprise System 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 Santa Ysabel Enterprise System have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in February 2026. 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 Santa Ysabel Enterprise System'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 4 violations for this system; 1 is health-based, and the most recent began in February 2026. For current results, consult EPA ECHO, or the EPA Region 09.
Where can I find Santa Ysabel Enterprise System's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Santa Ysabel Enterprise System 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 |
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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, “Santa Ysabel Enterprise System, PWSID 090600054, California”, https://aquacensus.com/water-systems/california/santa-ysabel-enterprise-system-090600054 (data as of October 1, 2026).