Public water system · KS2014914
ActiveSt Marys, City of
At a glance
City of St Marys (PWSID KS2014914) is an active community water system in Pottawatomie County, Kansas. It reports serving 2,781 people through 981 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,781
Service connections
981
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does City of St Marys compare with other water systems in Pottawatomie County?
By EPA's size categories, City of St Marys is a small system (501 to 3,300 people). Pottawatomie County has 19 active public water systems, and City of St Marys is the 3rd-largest of them by population served. Its population served is about 128% above the county average of 1,221 people per system, and accounts for 12% of the 23,206 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 St Marys is about 59% 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 St Marys?
EPA lists City of St Marys 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. 13 of the 19 active systems in Pottawatomie County (68%) are also owned by a local government.
Does City of St Marys have drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in July 2025. The violations listed here began between June 1987 and July 2025. By type: 5 contaminant level above the legal limit, 4 monitoring and reporting, 2 public notice, recordkeeping or other and 1 reporting. The contaminant or rule involved most often is Nitrate (5 of them). EPA lists 9 as resolved, 2 as archived and 1 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status. 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 |
| 2020-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2018-07-16 | Public notice, recordkeeping or otherFailure to Consult with State · code 20 | Groundwater Rulecode 0700 | No | Resolved |
| 2017-12-31 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1997-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 1997-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Resolved |
| 1996-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1988-03-29 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Archived |
| 1987-06-23 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Archived |
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 St Marys: frequently asked questions
Who runs City of St Marys?
City of St Marys (PWSID KS2014914) 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 St Marys serve?
City of St Marys reports serving 2,781 people through 981 service connections in Pottawatomie County, Kansas.
Where does City of St Marys 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 St Marys have any drinking water violations?
Of the 12 most recent violations in EPA's records, 5 are 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 St Marys' 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, 5 are 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 St Marys' water quality report?
As a community water system, City of St Marys 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 Pottawatomie County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pottawatomie Co Rwd 1 | Pottawatomie | 7,535 | Community | Groundwater |
| Wamego, City of | Pottawatomie | 4,860 | Community | Groundwater |
| Pottawatomie Co Rwd 3 | Pottawatomie | 1,455 | Community | Groundwater |
| Pottawatomie Co Rwd 4 | Pottawatomie | 1,125 | Community | Groundwater |
| St George, City of | Pottawatomie | 998 | Community | Groundwater |
| Pottawatomie Co Rwd 2 | Pottawatomie | 865 | 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, “St Marys, City of, PWSID KS2014914, Kansas”, https://aquacensus.com/water-systems/kansas/st-marys-city-of-ks2014914 (data as of October 1, 2026).