Public water system · MO1010261
ActiveExcelsior Springs Pws
At a glance
Excelsior Springs Pws (PWSID MO1010261) is an active community water system in Clay County, Missouri. It reports serving 11,084 people through 4,508 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; 3 are health-based, and the most recent began in April 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
11,084
Service connections
4,508
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Excelsior Springs Pws compare with other water systems in Clay County?
By EPA's size categories, Excelsior Springs Pws is a large system (10,001 to 100,000 people). Clay County has 20 active public water systems, and Excelsior Springs Pws is the 4th-largest of them by population served. Its population served is about 77% above the county average of 6,258 people per system, and accounts for 8.9% of the 125,166 people reported by systems filed under the county. Across Missouri, the 2,943 active systems average 2,049 people each. Nationally, the average active community water system reports serving 6,703 people, so Excelsior Springs Pws is about 65% 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. Missouri has 1,612 active community water systems, 55% of the state's 2,943 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,521 Missouri systems (86%) list groundwater as their primary source.
Who owns and regulates Excelsior Springs Pws?
EPA lists Excelsior Springs Pws as owned by a local government. The MO state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 19 of the 20 active systems in Clay County (95%) are also owned by a local government.
Does Excelsior Springs Pws have drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in April 2025. The violations listed here began between July 1993 and April 2025. By type: 3 monitoring and reporting and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (3 of them). EPA lists 5 as resolved and 1 as archived. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-04-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 2019-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2019-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2016-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2016-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 1993-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
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.
Excelsior Springs Pws: frequently asked questions
Who runs Excelsior Springs Pws?
Excelsior Springs Pws (PWSID MO1010261) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Excelsior Springs Pws serve?
Excelsior Springs Pws reports serving 11,084 people through 4,508 service connections in Clay County, Missouri.
Where does Excelsior Springs Pws 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 Excelsior Springs Pws have any drinking water violations?
EPA's records list 6 violations for this system; 3 are health-based, and the most recent began in April 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 Excelsior Springs Pws' 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; 3 are health-based, and the most recent began in April 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Excelsior Springs Pws' water quality report?
As a community water system, Excelsior Springs Pws 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 Clay County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Liberty Pws | Clay | 30,800 | Community | Groundwater |
| Gladstone Pws | Clay | 27,000 | Community | Groundwater |
| Kearney Pws | Clay | 11,500 | Community | Purchased surface water |
| Smithville Pws | Clay | 10,885 | Community | Surface water |
| Ray County Cons Pwsd 2 | Clay + 2 more | 9,360 | Community | Groundwater |
| Clay County Pwsd 6 | Clay | 4,912 | 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, “Excelsior Springs Pws, PWSID MO1010261, Missouri”, https://aquacensus.com/water-systems/missouri/excelsior-springs-pws-mo1010261 (data as of October 1, 2026).