Public water system · MO3010441
ActiveLake Ozark Pws
At a glance
Lake Ozark Pws (PWSID MO3010441) is an active community water system in Miller County, Missouri. It reports serving 2,007 people through 1,039 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,007
Service connections
1,039
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lake Ozark Pws compare with other water systems in Miller County?
By EPA's size categories, Lake Ozark Pws is a small system (501 to 3,300 people). Miller County has 51 active public water systems, and Lake Ozark Pws is the 2nd-largest of them by population served. Its population served is about 8 times the county average of 252 people per system, and accounts for 16% of the 12,838 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 Lake Ozark 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 Lake Ozark Pws?
EPA lists Lake Ozark 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. 8 of the 51 active systems in Miller County (16%) are also owned by a local government.
Does Lake Ozark Pws have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in December 2025. The violations listed here began between March 2012 and December 2025. By type: 3 monitoring and reporting, 3 public notice, recordkeeping or other, 2 reporting, 2 contaminant level above the legal limit, 1 monitoring and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 10 as resolved and 2 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 |
|---|---|---|---|---|
| 2025-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2022-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-05-17 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2016-02-12 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2015-11-14 | Public notice, recordkeeping or otherFailure to Consult with State · code 20 | Groundwater Rulecode 0700 | No | Resolved |
| 2014-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2012-03-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
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.
Lake Ozark Pws: frequently asked questions
Who runs Lake Ozark Pws?
Lake Ozark Pws (PWSID MO3010441) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Lake Ozark Pws serve?
Lake Ozark Pws reports serving 2,007 people through 1,039 service connections in Miller County, Missouri.
Where does Lake Ozark 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 Lake Ozark Pws have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in December 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 Lake Ozark 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. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in December 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 Lake Ozark Pws' water quality report?
As a community water system, Lake Ozark 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 Miller County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Eldon Pws | Miller | 4,895 | Community | Groundwater |
| Iberia Pws | Miller | 700 | Community | Groundwater |
| Lake Ozark State Park Homestead | Miller | 500 | Transient non-community | Groundwater |
| St Elizabeth Pws | Miller | 435 | Community | Groundwater |
| El Rancho Travel Center | Miller | 350 | Transient non-community | Groundwater |
| Miller County R Iii Schools | Miller | 271 | Non-transient non-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, “Lake Ozark Pws, PWSID MO3010441, Missouri”, https://aquacensus.com/water-systems/missouri/lake-ozark-pws-mo3010441 (data as of October 1, 2026).