Public water system · MO1024478
ActivePlatte Co Pwsd 4
At a glance
Platte Co Pwsd 4 (PWSID MO1024478) is an active community water system in Platte County, Missouri. It reports serving 9,552 people through 3,943 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in July 2004.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
9,552
Service connections
3,943
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Platte Co Pwsd 4 compare with other water systems in Platte County?
By EPA's size categories, Platte Co Pwsd 4 is a medium system (3,301 to 10,000 people). Platte County has 20 active public water systems, and Platte Co Pwsd 4 is the 2nd-largest of them by population served. Its population served is about 3.5 times the county average of 2,712 people per system, and accounts for 18% of the 54,230 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 Platte Co Pwsd 4 is about 43% 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 179 Missouri systems (6.1%) list purchased surface water as their primary source.
Who owns and regulates Platte Co Pwsd 4?
EPA lists Platte Co Pwsd 4 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. 17 of the 20 active systems in Platte County (85%) are also owned by a local government.
Does Platte Co Pwsd 4 have drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in July 2004. The violations listed here began between January 1985 and July 2004. By type: 8 monitoring and reporting and 4 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (8 of them). EPA lists 8 as resolved and 4 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 |
|---|---|---|---|---|
| 2004-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2004-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1998-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-08-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1985-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Archived |
| 1985-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Archived |
| 1985-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1985-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | 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.
Platte Co Pwsd 4: frequently asked questions
Who runs Platte Co Pwsd 4?
Platte Co Pwsd 4 (PWSID MO1024478) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Platte Co Pwsd 4 serve?
Platte Co Pwsd 4 reports serving 9,552 people through 3,943 service connections in Platte County, Missouri.
Where does Platte Co Pwsd 4 get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Platte Co Pwsd 4 have any drinking water violations?
Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in July 2004. 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 Platte Co Pwsd 4'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. Of the 12 most recent violations in EPA's records, 4 are health-based, and the most recent began in July 2004. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Platte Co Pwsd 4's water quality report?
As a community water system, Platte Co Pwsd 4 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 Platte County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mo American Platte County | Platte | 16,645 | Community | Groundwater |
| Platte County Cons Pwsd 1 | Platte | 7,074 | Community | Purchased surface water |
| Platte City Pws | Platte | 4,691 | Community | Purchased surface water |
| Platte County Pwsd 6 | Platte | 2,095 | Community | Purchased groundwater |
| Weatherby Lake Pws | Platte | 2,077 | Community | Purchased surface water |
| Platte Co Pwsd 9 | Platte | 1,860 | 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, “Platte Co Pwsd 4, PWSID MO1024478, Missouri”, https://aquacensus.com/water-systems/missouri/platte-co-pwsd-4-mo1024478 (data as of October 1, 2026).