Public water system · MO1021117
ActiveHenry County Pwsd 3
At a glance
Henry County Pwsd 3 (PWSID MO1021117) is an active community water system in Henry County, Missouri. It reports serving 2,993 people through 862 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; 5 are health-based, and the most recent began in July 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,993
Service connections
862
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Henry County Pwsd 3 compare with other water systems in Henry County?
By EPA's size categories, Henry County Pwsd 3 is a small system (501 to 3,300 people). Henry County has 13 active public water systems, and Henry County Pwsd 3 is the 2nd-largest of them by population served. Its population served is about 67% above the county average of 1,797 people per system, and accounts for 13% of the 23,361 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 Henry County Pwsd 3 is about 55% 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 surface water means the system buys surface water from another public water system rather than drawing its own. 179 Missouri systems (6.1%) list purchased surface water as their primary source.
Who owns and regulates Henry County Pwsd 3?
EPA lists Henry County Pwsd 3 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. 10 of the 13 active systems in Henry County (77%) are also owned by a local government.
Does Henry County Pwsd 3 have drinking water violations?
EPA's records list 7 violations for this system; 5 are health-based, and the most recent began in July 2016. The violations listed here began between January 1995 and July 2016. By type: 5 contaminant level above the legal limit and 2 monitoring and reporting. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (4 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 |
|---|---|---|---|---|
| 2016-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2016-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2016-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2015-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2007-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | 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.
Henry County Pwsd 3: frequently asked questions
Who runs Henry County Pwsd 3?
Henry County Pwsd 3 (PWSID MO1021117) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Henry County Pwsd 3 serve?
Henry County Pwsd 3 reports serving 2,993 people through 862 service connections in Henry County, Missouri.
Where does Henry County Pwsd 3 get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Henry County Pwsd 3 have any drinking water violations?
EPA's records list 7 violations for this system; 5 are health-based, and the most recent began in July 2016. 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 Henry County Pwsd 3'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; 5 are health-based, and the most recent began in July 2016. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Henry County Pwsd 3's water quality report?
As a community water system, Henry County Pwsd 3 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 Henry County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Henry County Water Company | Henry | 11,373 | Community | Surface water |
| Windsor Pws | Henry | 2,900 | Community | Groundwater |
| Harry S Truman Pwsd 2 | Henry + 1 more | 2,700 | Community | Surface water |
| Henry County Pwsd 4 | Henry | 1,140 | Community | Purchased surface water |
| Urich Pws | Henry | 505 | Community | Purchased surface water |
| Deepwater Pws | Henry | 433 | Community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Henry County Pwsd 3, PWSID MO1021117, Missouri”, https://aquacensus.com/water-systems/missouri/henry-county-pwsd-3-mo1021117 (data as of October 1, 2026).