Public water system · KS2017344
ActiveColwich, City of
At a glance
City of Colwich (PWSID KS2017344) is an active community water system in Sedgwick County, Kansas. It reports serving 1,463 people through 538 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; none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,463
Service connections
538
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of Colwich compare with other water systems in Sedgwick County?
By EPA's size categories, City of Colwich is a small system (501 to 3,300 people). Sedgwick County has 29 active public water systems. Its population served is well below the county average of 17,187 people per system, and accounts for 0.3% of the 498,426 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 Colwich 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 587 Kansas systems (56%) list groundwater as their primary source.
Who owns and regulates City of Colwich?
EPA lists City of Colwich 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. 21 of the 29 active systems in Sedgwick County (72%) are also owned by a local government.
Does City of Colwich have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between June 2013 and July 2025. By type: 3 monitoring and reporting, 2 reporting and 1 monitoring. The contaminant or rule involved most often is Lead and Copper Rule Revisions (2 of them). EPA lists 4 as resolved and 2 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2025-01-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2021-10-31 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2019-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
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 Colwich: frequently asked questions
Who runs City of Colwich?
City of Colwich (PWSID KS2017344) 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 Colwich serve?
City of Colwich reports serving 1,463 people through 538 service connections in Sedgwick County, Kansas.
Where does City of Colwich 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 Colwich have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in July 2025. 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 Colwich'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; none is health-based, and the most recent began in July 2025. 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 Colwich's water quality report?
As a community water system, City of Colwich 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 Sedgwick County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Wichita, City of | Sedgwick | 395,699 | Community | Surface water |
| Derby, City of | Sedgwick | 25,413 | Community | Purchased surface water |
| Haysville, City of | Sedgwick | 11,315 | Community | Groundwater |
| Park City, City of | Sedgwick | 8,503 | Community | Purchased surface water |
| Bel Aire, City of | Sedgwick | 8,448 | Community | Purchased surface water |
| Valley Center, City of | Sedgwick | 7,419 | Community | Purchased 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, “Colwich, City of, PWSID KS2017344, Kansas”, https://aquacensus.com/water-systems/kansas/colwich-city-of-ks2017344 (data as of October 1, 2026).