Public water system · MO1024118
ActiveCass County Pwsd 9
At a glance
Cass County Pwsd 9 (PWSID MO1024118) is an active community water system in Cass County, Missouri. It reports serving 6,063 people through 2,461 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in September 2010.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
6,063
Service connections
2,461
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Cass County Pwsd 9 compare with other water systems in Cass County?
By EPA's size categories, Cass County Pwsd 9 is a medium system (3,301 to 10,000 people). Cass County has 31 active public water systems. Its population served is well below the county average of 21,480 people per system, and accounts for 0.9% of the 665,874 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 Cass County Pwsd 9 is roughly in line with 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. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 177 Missouri systems (6%) list purchased groundwater as their primary source.
Who owns and regulates Cass County Pwsd 9?
EPA lists Cass County Pwsd 9 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. 24 of the 31 active systems in Cass County (77%) are also owned by a local government.
Does Cass County Pwsd 9 have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in September 2010. The violations listed here began between April 1991 and September 2010. By type: 2 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 2 as archived and 1 as resolved. 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. 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 |
|---|---|---|---|---|
| 2010-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1991-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 3 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.
Cass County Pwsd 9: frequently asked questions
Who runs Cass County Pwsd 9?
Cass County Pwsd 9 (PWSID MO1024118) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Cass County Pwsd 9 serve?
Cass County Pwsd 9 reports serving 6,063 people through 2,461 service connections in Cass County, Missouri.
Where does Cass County Pwsd 9 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 Cass County Pwsd 9 have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in September 2010. 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 Cass County Pwsd 9'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 3 violations for this system; 1 is health-based, and the most recent began in September 2010. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Cass County Pwsd 9's water quality report?
As a community water system, Cass County Pwsd 9 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 Cass County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kansas City Pws | Cass + 4 more | 553,295 | Community | Surface water |
| Belton Pws | Cass | 23,598 | Community | Purchased surface water |
| Raymore Pws | Cass | 21,517 | Community | Purchased surface water |
| Harrisonville Pws | Cass | 10,019 | Community | Surface water |
| Pleasant Hill Pws | Cass | 8,262 | Community | Purchased surface water |
| Peculiar Pws | Cass | 6,226 | 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, “Cass County Pwsd 9, PWSID MO1024118, Missouri”, https://aquacensus.com/water-systems/missouri/cass-county-pwsd-9-mo1024118 (data as of October 1, 2026).