Public water system · KS2009908

Active

Oswego, City of

At a glance

City of Oswego (PWSID KS2009908) is an active community water system in Labette County, Kansas. It reports serving 1,680 people through 823 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2024.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

1,680

Service connections

823

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDKS2009908

System typeCommunity water system

Activity statusActive

Population served1,680

Service connections823

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyKS state drinking water program

City servedOswego

StateKansas

ZIP—

CountyLabette County

How does City of Oswego compare with other water systems in Labette County?

By EPA's size categories, City of Oswego is a small system (501 to 3,300 people). Labette County has 15 active public water systems, and City of Oswego is the 2nd-largest of them by population served. Its population served is about 29% above the county average of 1,307 people per system, and accounts for 8.6% of the 19,599 people reported by systems filed under the county. Across Kansas, the 1,041 active systems average 2,800 people each. Nationally, the average active community water system reports serving 6,703 people, so City of Oswego 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. Kansas has 863 active community water systems, 83% of the state's 1,041 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 75 Kansas systems (7.2%) list surface water as their primary source.

Who owns and regulates City of Oswego?

EPA lists City of Oswego as owned by a local government. The KS state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 14 of the 15 active systems in Labette County (93%) are also owned by a local government.

Does City of Oswego have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2024. The violations listed here began between March 2017 and August 2024. By type: 9 monitoring and reporting, 2 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Surface Water Treatment Rule (4 of them). EPA lists 12 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
2024-08-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2024-01-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2023-06-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2021-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Chloritecode 1009	Yes	Resolved
2019-05-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2019-05-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	No	Resolved
2019-01-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2018-06-09	Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75	Public Noticecode 7500	No	Resolved
2018-03-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Chloritecode 1009	Yes	Resolved
2017-09-28	Monitoring and reportingFailure Submit IDSE/Subpart V Plan Rpt · code 35	Total trihalomethanes (TTHM)code 2950	No	Resolved
2017-03-11	Monitoring and reportingFailure Submit IDSE/Subpart V Plan Rpt · code 35	Haloacetic acids (HAA5)code 2456	No	Resolved
2017-03-11	Monitoring and reportingFailure Submit IDSE/Subpart V Plan Rpt · code 35	Total trihalomethanes (TTHM)code 2950	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.

City of Oswego: frequently asked questions

Who runs City of Oswego?

City of Oswego (PWSID KS2009908) is a community water system owned by a local government. It is regulated by the KS state drinking water program.

How many people does City of Oswego serve?

City of Oswego reports serving 1,680 people through 823 service connections in Labette County, Kansas.

Where does City of Oswego get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does City of Oswego have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2024. 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 Oswego'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, 2 are health-based, and the most recent began in August 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the KS state drinking water program.

Where can I find City of Oswego's water quality report?

As a community water system, City of Oswego 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 Labette County

Water system	County	Population served	Type	Source
Parsons, City of	Labette	9,479	Community	Surface water
Labette Co Rwd 5	Labette	1,635	Community	Purchased surface water
Labette Co Rwd 6	Labette	1,550	Community	Purchased surface water
Labette Co Rwd 8	Labette	1,063	Community	Purchased surface water
Altamont, City of	Labette	1,044	Community	Purchased surface water
Chetopa, City of	Labette	921	Community	Surface water

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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, “Oswego, City of, PWSID KS2009908, Kansas”, https://aquacensus.com/water-systems/kansas/oswego-city-of-ks2009908 (data as of October 1, 2026).