Public water system · IL3160945
ActiveLena Koa - Northwest Well
At a glance
Lena Koa - Northwest Well (PWSID IL3160945) is an active transient non-community water system in Stephenson County, Illinois. It reports serving 25 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Lena Koa - Northwest Well compare with other water systems in Stephenson County?
By EPA's size categories, Lena Koa - Northwest Well is a very small system (500 people or fewer). Stephenson County has 42 active public water systems. Its population served is well below the county average of 811 people per system, and accounts for less than 0.1% of the 34,049 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 Lena Koa - Northwest Well is well below 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 Lena Koa - Northwest Well?
EPA lists Lena Koa - Northwest Well as privately owned. The IL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 29 of the 42 active systems in Stephenson County (69%) are also privately owned.
Does Lena Koa - Northwest Well have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2025. The violations listed here began between July 2020 and January 2025. By type: 2 monitoring, 1 public notice, recordkeeping or other and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 2 as resolved, 1 as unaddressed and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-01-22 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2023-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2020-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | 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.
Lena Koa - Northwest Well: frequently asked questions
Who runs Lena Koa - Northwest Well?
Lena Koa - Northwest Well (PWSID IL3160945) is a transient non-community water system privately owned. It is regulated by the IL state drinking water program.
How many people does Lena Koa - Northwest Well serve?
Lena Koa - Northwest Well reports serving 25 people through 1 service connection in Stephenson County, Illinois.
Where does Lena Koa - Northwest Well 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 Lena Koa - Northwest Well have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2025. 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 Lena Koa - Northwest Well'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; none is health-based, and the most recent began in January 2025. For current results, consult EPA ECHO, or the IL state drinking water program.
Where can I find Lena Koa - Northwest Well's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Lena Koa - Northwest Well 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.
Other water systems in Stephenson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Freeport | Stephenson | 23,930 | Community | Groundwater |
| Lena | Stephenson | 2,680 | Community | Groundwater |
| Pearl City | Stephenson | 790 | Community | Groundwater |
| Orangeville | Stephenson | 780 | Community | Groundwater |
| Cedarville | Stephenson | 663 | Community | Groundwater |
| Prairie Path Water Company-Northern Hill | Stephenson | 600 | Community | Groundwater |
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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, “Lena Koa - Northwest Well, PWSID IL3160945, Illinois”, https://aquacensus.com/water-systems/illinois/lena-koa-northwest-well-il3160945 (data as of October 1, 2026).