Public water system · KS2008714

Active

Oskaloosa, City of

At a glance

City of Oskaloosa (PWSID KS2008714) is an active community water system in Jefferson County, Kansas. It reports serving 1,086 people through 498 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2024.

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

Population served

1,086

Service connections

498

Primary source

GWP

Purchased groundwater

System type

CWS

Community water system

System record

PWSIDKS2008714

System typeCommunity water system

Activity statusActive

Population served1,086

Service connections498

Primary water sourcePurchased groundwater

Owner typeLocal government

Primacy agencyKS state drinking water program

City servedOskaloosa

StateKansas

ZIP—

CountyJefferson County

How does City of Oskaloosa compare with other water systems in Jefferson County?

By EPA's size categories, City of Oskaloosa is a small system (501 to 3,300 people). Jefferson County has 19 active public water systems, and City of Oskaloosa is the 6th-largest of them by population served. Its population served is roughly in line with the county average of 1,061 people per system, and accounts for 5.4% of the 20,164 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 Oskaloosa 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. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 90 Kansas systems (8.6%) list purchased groundwater as their primary source.

Who owns and regulates City of Oskaloosa?

EPA lists City of Oskaloosa 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. 17 of the 19 active systems in Jefferson County (89%) are also owned by a local government.

Does City of Oskaloosa have drinking water violations?

Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 2024. The violations listed here began between November 1992 and January 2024. By type: 9 monitoring and reporting, 2 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (3 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
2024-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2024-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2020-12-30	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2018-09-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2018-09-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2017-12-30	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2000-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
1999-10-19	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
1998-02-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
1996-01-01	Required treatment not metOCCT/SOWT Study/Recommendation · code 57	Lead and Copper Rulecode 5000	Yes	Resolved
1994-10-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
1992-11-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	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 Oskaloosa: frequently asked questions

Who runs City of Oskaloosa?

City of Oskaloosa (PWSID KS2008714) 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 Oskaloosa serve?

City of Oskaloosa reports serving 1,086 people through 498 service connections in Jefferson County, Kansas.

Where does City of Oskaloosa get its water?

EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.

Does City of Oskaloosa have any drinking water violations?

Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in January 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 Oskaloosa'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, one is health-based, and the most recent began in January 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 Oskaloosa's water quality report?

As a community water system, City of Oskaloosa 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 Jefferson County

Water system	County	Population served	Type	Source
Jefferson Co Rwd 12	Jefferson	3,635	Community	Purchased surface water
Jefferson Co Rwd 3	Jefferson	2,435	Community	Groundwater
Jefferson Co Rwd 1	Jefferson	2,343	Community	Groundwater
Jefferson Co Rwd 13	Jefferson	2,115	Community	Groundwater
Jefferson Co Rwd 7	Jefferson	1,180	Community	Groundwater
Valley Falls, City of	Jefferson	1,086	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, “Oskaloosa, City of, PWSID KS2008714, Kansas”, https://aquacensus.com/water-systems/kansas/oskaloosa-city-of-ks2008714 (data as of October 1, 2026).