Public water system · CA4901017
ActiveNaco West - Russian River Preserve
At a glance
Naco West - Russian River Preserve (PWSID CA4901017) is an active transient non-community water system in Sonoma County, Illinois. It reports serving 263 people through 125 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in June 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
263
Service connections
125
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Naco West - Russian River Preserve compare with other water systems in Sonoma County?
By EPA's size categories, Naco West - Russian River Preserve is a very small system (500 people or fewer). Sonoma County has 1 active public water system, and Naco West - Russian River Preserve is the largest of them by population served. Its population served is roughly in line with the county average of 263 people per system, and accounts for 100% of the 263 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Naco West - Russian River Preserve is about 83% above that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Illinois has 1,703 active transient non-community water systems, 44% of the state's 3,872 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,808 Illinois systems (73%) list groundwater as their primary source.
Who owns and regulates Naco West - Russian River Preserve?
EPA lists Naco West - Russian River Preserve as privately owned. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 1 of the 1 active systems in Sonoma County (100%) are also privately owned.
Does Naco West - Russian River Preserve have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in June 2013. The violations listed here began between February 1999 and June 2013. By type: 2 contaminant level above the legal limit and 2 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2013-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1999-02-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | 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.
Naco West - Russian River Preserve: frequently asked questions
Who runs Naco West - Russian River Preserve?
Naco West - Russian River Preserve (PWSID CA4901017) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Naco West - Russian River Preserve serve?
Naco West - Russian River Preserve reports serving 263 people through 125 service connections in Sonoma County, Illinois.
Where does Naco West - Russian River Preserve 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 Naco West - Russian River Preserve have any drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in June 2013. 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 Naco West - Russian River Preserve'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; 2 are health-based, and the most recent began in June 2013. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Naco West - Russian River Preserve's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Naco West - Russian River Preserve is a 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.
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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, “Naco West - Russian River Preserve, PWSID CA4901017, Illinois”, https://aquacensus.com/water-systems/illinois/naco-west-russian-river-preserve-ca4901017 (data as of October 1, 2026).