Public water system · OK2006759
ActiveStonebrook Utility Company
At a glance
Stonebrook Utility Company (PWSID OK2006759) is an active community water system in Seminole County, Nebraska. It reports serving 136 people through 39 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
136
Service connections
39
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Stonebrook Utility Company compare with other water systems in Seminole County?
By EPA's size categories, Stonebrook Utility Company is a very small system (500 people or fewer). Seminole County has 1 active public water system, and Stonebrook Utility Company is the largest of them by population served. Its population served is roughly in line with the county average of 136 people per system, and accounts for 100% of the 136 people reported by systems filed under the county. Across Nebraska, the 1,226 active systems average 1,472 people each. Nationally, the average active community water system reports serving 6,703 people, so Stonebrook Utility Company is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Nebraska has 599 active community water systems, 49% of the state's 1,226 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,095 Nebraska systems (89%) list groundwater as their primary source.
Who owns and regulates Stonebrook Utility Company?
EPA lists Stonebrook Utility Company as privately owned. The OK 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 Seminole County (100%) are also privately owned.
Does Stonebrook Utility Company have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2025. The violations listed here began between October 2023 and August 2025. By type: 9 monitoring and reporting, 2 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Gross Beta Particle Activity (3 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2025-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Unaddressed |
| 2025-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2025-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross Beta Particle Activitycode 4100 | No | Resolved |
| 2025-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2025-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross Beta Particle Activitycode 4100 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2023-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross Beta Particle Activitycode 4100 | No | Resolved |
The 12 most recent 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.
Stonebrook Utility Company: frequently asked questions
Who runs Stonebrook Utility Company?
Stonebrook Utility Company (PWSID OK2006759) is a community water system privately owned. It is regulated by the OK state drinking water program.
How many people does Stonebrook Utility Company serve?
Stonebrook Utility Company reports serving 136 people through 39 service connections in Seminole County, Nebraska.
Where does Stonebrook Utility Company 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 Stonebrook Utility Company have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 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 Stonebrook Utility Company'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the OK state drinking water program.
Where can I find Stonebrook Utility Company's water quality report?
As a community water system, Stonebrook Utility Company must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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, “Stonebrook Utility Company, PWSID OK2006759, Nebraska”, https://aquacensus.com/water-systems/nebraska/stonebrook-utility-company-ok2006759 (data as of October 1, 2026).