Public water system · NE3104309
ActiveSouth Sioux City, City of
At a glance
City of South Sioux City (PWSID NE3104309) is an active community water system in Dakota County, Nebraska. It reports serving 14,043 people through 4,482 service connections. Its primary water source is purchased groundwater under influence, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is health-based, and the most recent began in August 2000.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
14,043
Service connections
4,482
Primary source
GUP
Purchased groundwater under influence
System type
CWS
Community water system
System record
How does City of South Sioux City compare with other water systems in Dakota County?
By EPA's size categories, City of South Sioux City is a large system (10,001 to 100,000 people). Dakota County has 10 active public water systems, and City of South Sioux City is the largest of them by population served. Its population served is about 6 times the county average of 2,342 people per system, and accounts for 60% of the 23,417 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 South Sioux City is about twice 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. Purchased groundwater under the influence of surface water means the system buys that kind of water from another public water system. 5 Nebraska systems (0.4%) list purchased groundwater under influence as their primary source.
Who owns and regulates City of South Sioux City?
EPA lists City of South Sioux City 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. 6 of the 10 active systems in Dakota County (60%) are also owned by a local government.
Does City of South Sioux City have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in August 2000. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Total coliform bacteria (TCR). EPA lists 1 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 |
|---|---|---|---|---|
| 2000-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
The one violation in EPA's records.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 South Sioux City: frequently asked questions
Who runs City of South Sioux City?
City of South Sioux City (PWSID NE3104309) 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 South Sioux City serve?
City of South Sioux City reports serving 14,043 people through 4,482 service connections in Dakota County, Nebraska.
Where does City of South Sioux City get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater under influence. Purchased groundwater under the influence of surface water means the system buys that kind of water from another public water system.
Does City of South Sioux City have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in August 2000. 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 South Sioux City'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 one violation for this system; it is health-based, and the most recent began in August 2000. 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 South Sioux City's water quality report?
As a community water system, City of South Sioux City 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 Dakota County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tyson Fresh Meats, Inc. - Dakota City | Dakota | 4,110 | Non-transient non-community | Groundwater |
| Dakota City, City of | Dakota | 2,081 | Community | Groundwater |
| Dakota Co Rural Water | Dakota | 2,032 | Community | Purchased groundwater |
| Homer, Village of | Dakota | 532 | Community | Groundwater |
| Jackson, Village of | Dakota | 235 | Community | Groundwater |
| Hubbard, Village of | Dakota | 234 | Community | Groundwater |
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, “South Sioux City, City of, PWSID NE3104309, Nebraska”, https://aquacensus.com/water-systems/nebraska/south-sioux-city-city-of-ne3104309 (data as of October 1, 2026).