Public water system · MO4010643
ActivePilot Knob Pws
At a glance
Pilot Knob Pws (PWSID MO4010643) is an active community water system in Iron County, Missouri. It reports serving 746 people through 375 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
746
Service connections
375
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Pilot Knob Pws compare with other water systems in Iron County?
By EPA's size categories, Pilot Knob Pws is a small system (501 to 3,300 people). Iron County has 23 active public water systems, and Pilot Knob Pws is the 3rd-largest of them by population served. Its population served is about 162% above the county average of 285 people per system, and accounts for 11% of the 6,544 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 Pilot Knob 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. 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 Pilot Knob Pws?
EPA lists Pilot Knob 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 23 active systems in Iron County (26%) are also owned by a local government.
Does Pilot Knob Pws have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between February 2021 and July 2025. By type: 1 reporting, 1 public notice, recordkeeping or other and 1 monitoring. The contaminants or rules involved are Lead and Copper Rule Revisions, Consumer Confidence Rule and Revised Total Coliform Rule. EPA lists 2 as resolved 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. 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 |
| 2021-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2021-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
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.
Pilot Knob Pws: frequently asked questions
Who runs Pilot Knob Pws?
Pilot Knob Pws (PWSID MO4010643) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Pilot Knob Pws serve?
Pilot Knob Pws reports serving 746 people through 375 service connections in Iron County, Missouri.
Where does Pilot Knob 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 Pilot Knob Pws have any drinking water violations?
EPA's records list 3 violations for this system; none 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 Pilot Knob 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 3 violations for this system; none 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 Pilot Knob Pws' water quality report?
As a community water system, Pilot Knob 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 Iron County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mo American Ironton | Iron | 1,460 | Community | Surface water |
| Pilot Knob Rural Wd 1 N & S | Iron | 839 | Community | Purchased groundwater |
| Viburnum Pws | Iron | 639 | Community | Groundwater |
| Arcadia Pws | Iron | 607 | Community | Groundwater |
| Doe Run Company Buick Smelter | Iron | 311 | Non-transient non-community | Groundwater |
| Annapolis Pws | Iron | 300 | 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, “Pilot Knob Pws, PWSID MO4010643, Missouri”, https://aquacensus.com/water-systems/missouri/pilot-knob-pws-mo4010643 (data as of October 1, 2026).