Public water system · MO1010696
ActiveRock Port Pws
At a glance
Rock Port Pws (PWSID MO1010696) is an active community water system in Atchison County, Missouri. It reports serving 1,318 people through 650 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,318
Service connections
650
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Rock Port Pws compare with other water systems in Atchison County?
By EPA's size categories, Rock Port Pws is a small system (501 to 3,300 people). Atchison County has 7 active public water systems, and Rock Port Pws is the 2nd-largest of them by population served. Its population served is about twice the county average of 616 people per system, and accounts for 31% of the 4,315 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 Rock Port Pws 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. 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 Rock Port Pws?
EPA lists Rock Port 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. 6 of the 7 active systems in Atchison County (86%) are also owned by a local government.
Does Rock Port Pws have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in July 2025. The violations listed here began between August 1999 and July 2025. By type: 1 reporting, 1 monitoring, 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as resolved, 1 as unaddressed 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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 |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2024-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1999-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 4 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.
Rock Port Pws: frequently asked questions
Who runs Rock Port Pws?
Rock Port Pws (PWSID MO1010696) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Rock Port Pws serve?
Rock Port Pws reports serving 1,318 people through 650 service connections in Atchison County, Missouri.
Where does Rock Port Pws 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 Rock Port Pws have any drinking water violations?
EPA's records list 4 violations for this system; 1 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 Rock Port 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 4 violations for this system; 1 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 MO state drinking water program.
Where can I find Rock Port Pws' water quality report?
As a community water system, Rock Port 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 Atchison County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tarkio Board of Public Works Pws | Atchison | 1,494 | Community | Purchased groundwater |
| Atchison County Pwsd 1 | Atchison | 700 | Community | Purchased groundwater |
| Fairfax Pws | Atchison | 638 | Community | Purchased groundwater |
| Westboro Pws | Atchison | 115 | Community | Purchased groundwater |
| Great Northwest Wholesale Water Commiss | Atchison + 10 more | 25 | Community | Purchased groundwater |
| Atchison County Wholesale Water Comm | Atchison | 25 | 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, “Rock Port Pws, PWSID MO1010696, Missouri”, https://aquacensus.com/water-systems/missouri/rock-port-pws-mo1010696 (data as of October 1, 2026).