Public water system · NE3112904
ActiveSuperior, City of
At a glance
City of Superior (PWSID NE3112904) is an active community water system in Nuckolls County, Nebraska. It reports serving 1,979 people through 1,059 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 5 are health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,979
Service connections
1,059
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Superior compare with other water systems in Nuckolls County?
By EPA's size categories, City of Superior is a small system (501 to 3,300 people). Nuckolls County has 5 active public water systems, and City of Superior is the largest of them by population served. Its population served is about 3.3 times the county average of 607 people per system, and accounts for 65% of the 3,037 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 City of Superior 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 City of Superior?
EPA lists City of Superior as owned by a local government. The NE state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 5 of the 5 active systems in Nuckolls County (100%) are also owned by a local government.
Does City of Superior have drinking water violations?
EPA's records list 6 violations for this system; 5 are health-based, and the most recent began in January 2026. The violations listed here began between August 1992 and January 2026. By type: 5 contaminant level above the legal limit and 1 monitoring. The contaminant or rule involved most often is Nitrate-Nitrite (2 of them). EPA lists 4 as resolved and 2 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. 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 |
|---|---|---|---|---|
| 2026-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2006-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitrate-Nitritecode 1038 | Yes | Resolved |
| 2003-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitrate-Nitritecode 1038 | Yes | Resolved |
| 1998-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Resolved |
| 1992-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1992-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 6 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.
City of Superior: frequently asked questions
Who runs City of Superior?
City of Superior (PWSID NE3112904) is a community water system owned by a local government. It is regulated by the NE state drinking water program.
How many people does City of Superior serve?
City of Superior reports serving 1,979 people through 1,059 service connections in Nuckolls County, Nebraska.
Where does City of Superior 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 City of Superior have any drinking water violations?
EPA's records list 6 violations for this system; 5 are health-based, and the most recent began in January 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 City of Superior'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 6 violations for this system; 5 are health-based, and the most recent began in January 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the NE state drinking water program.
Where can I find City of Superior's water quality report?
As a community water system, City of Superior 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.
Other water systems in Nuckolls County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Nelson, City of | Nuckolls | 490 | Community | Groundwater |
| Lawrence, Village of | Nuckolls | 304 | Community | Groundwater |
| Hardy, Village of | Nuckolls | 159 | Community | Purchased groundwater |
| Ruskin, Village of | Nuckolls | 105 | 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, “Superior, City of, PWSID NE3112904, Nebraska”, https://aquacensus.com/water-systems/nebraska/superior-city-of-ne3112904 (data as of October 1, 2026).