Public water system · MO4242474
ActiveLake Hanna Assn
At a glance
Lake Hanna Assn (PWSID MO4242474) is an active community water system serving Iron and St. Francois counties, Missouri. It reports serving 120 people through 7 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in May 2006.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
120
Service connections
7
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lake Hanna Assn compare with other water systems in Missouri?
By EPA's size categories, Lake Hanna Assn is a very small system (500 people or fewer). 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 Hanna Assn 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 Hanna Assn?
EPA lists Lake Hanna Assn 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.
Does Lake Hanna Assn have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in May 2006. The violations listed here began between May 2000 and May 2006. By type: 5 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 of them). EPA lists 7 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2006-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 7 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 Hanna Assn: frequently asked questions
Who runs Lake Hanna Assn?
Lake Hanna Assn (PWSID MO4242474) is a community water system privately owned. It is regulated by the MO state drinking water program.
How many people does Lake Hanna Assn serve?
Lake Hanna Assn reports serving 120 people through 7 service connections in Iron and St. Francois counties, Missouri.
Where does Lake Hanna Assn 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 Hanna Assn have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in May 2006. 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 Hanna Assn'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. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in May 2006. 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 Hanna Assn's water quality report?
As a community water system, Lake Hanna Assn 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(the first county EPA lists for this system)
| 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 |
| Pilot Knob Pws | Iron | 746 | Community | 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 |
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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 Hanna Assn, PWSID MO4242474, Missouri”, https://aquacensus.com/water-systems/missouri/lake-hanna-assn-mo4242474 (data as of October 1, 2026).