Public water system · KS2003513

Active

Winfield, City of

At a glance

City of Winfield (PWSID KS2003513) is an active community water system in Cowley County, Kansas. It reports serving 11,726 people through 5,042 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in September 2005.

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

Population served

11,726

Service connections

5,042

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDKS2003513

System typeCommunity water system

Activity statusActive

Population served11,726

Service connections5,042

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyKS state drinking water program

City servedWinfield

StateKansas

ZIP—

CountyCowley County

How does City of Winfield compare with other water systems in Cowley County?

By EPA's size categories, City of Winfield is a large system (10,001 to 100,000 people). Cowley County has 16 active public water systems, and City of Winfield is the 2nd-largest of them by population served. Its population served is about 5.3 times the county average of 2,193 people per system, and accounts for 33% of the 35,090 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 Winfield is about 75% above 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 Winfield?

EPA lists City of Winfield 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. 15 of the 16 active systems in Cowley County (94%) are also owned by a local government.

Does City of Winfield have drinking water violations?

EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in September 2005. The violations listed here began between October 1985 and September 2005. By type: 3 public notice, recordkeeping or other, 3 contaminant level above the legal limit, 2 required treatment not met and 2 monitoring and reporting. The contaminant or rule involved most often is Surface Water Treatment Rule (3 of them). EPA lists 10 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
2005-09-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
2005-08-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
2002-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Carbon, totalcode 2920	No	Resolved
2001-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	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
1998-05-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
1986-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
1986-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
1985-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved

All 10 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 Winfield: frequently asked questions

Who runs City of Winfield?

City of Winfield (PWSID KS2003513) 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 Winfield serve?

City of Winfield reports serving 11,726 people through 5,042 service connections in Cowley County, Kansas.

Where does City of Winfield 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 Winfield have any drinking water violations?

EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in September 2005. 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 Winfield'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 10 violations for this system; 5 are health-based, and the most recent began in September 2005. 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 Winfield's water quality report?

As a community water system, City of Winfield 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 Cowley County

Water system	County	Population served	Type	Source
Arkansas City, City of	Cowley	11,929	Community	Groundwater
Cowley Co Rwd 3	Cowley	2,500	Community	Groundwater
Cowley Co Rwd 5	Cowley	2,000	Community	Purchased surface water
Strother Field Airport Ind Park	Cowley	1,534	Non-transient non-community	Groundwater
Cowley Co Rwd 1	Cowley	1,500	Community	Groundwater
Cowley Co Rwd 6	Cowley	792	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, “Winfield, City of, PWSID KS2003513, Kansas”, https://aquacensus.com/water-systems/kansas/winfield-city-of-ks2003513 (data as of October 1, 2026).