Public water system · MO3252255
ActiveThe Knolls
At a glance
The Knolls (PWSID MO3252255) is an active community water system in Camden County, Missouri. It reports serving 725 people through 291 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
725
Service connections
291
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does The Knolls compare with other water systems in Camden County?
By EPA's size categories, The Knolls is a small system (501 to 3,300 people). Camden County has 226 active public water systems. Its population served is about 190% above the county average of 250 people per system, and accounts for 1.3% of the 56,563 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 The Knolls 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 The Knolls?
EPA lists The Knolls as privately owned. 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. 206 of the 226 active systems in Camden County (91%) are also privately owned.
Does The Knolls have drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in January 2026. The violations listed here began between January 1993 and January 2026. By type: 3 monitoring and reporting, 3 public notice, recordkeeping or other, 2 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Consumer Confidence Rule (3 of them). EPA lists 5 as resolved, 3 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 |
|---|---|---|---|---|
| 2026-01-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Unaddressed |
| 2025-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | 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 |
| 2019-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2000-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
All 9 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.
The Knolls: frequently asked questions
Who runs The Knolls?
The Knolls (PWSID MO3252255) is a community water system privately owned. It is regulated by the MO state drinking water program.
How many people does The Knolls serve?
The Knolls reports serving 725 people through 291 service connections in Camden County, Missouri.
Where does The Knolls 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 The Knolls have any drinking water violations?
EPA's records list 9 violations for this system; 1 is health-based, and the most recent began in January 2026. 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 The Knolls' 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 9 violations for this system; 1 is health-based, and the most recent began in January 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find The Knolls' water quality report?
As a community water system, The Knolls 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 Camden County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Camden County Pwsd 4 Horseshoe Bend | Camden | 7,912 | Community | Groundwater |
| Camdenton Pws | Camden | 3,960 | Community | Groundwater |
| Osage Beach Premium Outlets | Camden | 3,100 | Non-transient non-community | Groundwater |
| Osage Beach East Pws | Camden | 2,611 | Community | Groundwater |
| Big Surf Waterpark Inc. | Camden | 2,500 | Transient non-community | Groundwater |
| Camden County Pwsd #4 Shawnee Bend | Camden | 2,065 | 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, “The Knolls, PWSID MO3252255, Missouri”, https://aquacensus.com/water-systems/missouri/the-knolls-mo3252255 (data as of October 1, 2026).