Public water system · MO4010656

Active

Poplar Bluff Pws

At a glance

Poplar Bluff Pws (PWSID MO4010656) is an active community water system in Butler County, Missouri. It reports serving 17,043 people through 7,667 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in July 2025.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

17,043

Service connections

7,667

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDMO4010656

System typeCommunity water system

Activity statusActive

Population served17,043

Service connections7,667

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyMO state drinking water program

City servedPoplar Bluff

StateMissouri

ZIP—

CountyButler County

How does Poplar Bluff Pws compare with other water systems in Butler County?

By EPA's size categories, Poplar Bluff Pws is a large system (10,001 to 100,000 people). Butler County has 14 active public water systems, and Poplar Bluff Pws is the largest of them by population served. Its population served is about 6.6 times the county average of 2,566 people per system, and accounts for 47% of the 35,928 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 Poplar Bluff Pws is about 154% above 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 60 Missouri systems (2%) list surface water as their primary source.

Who owns and regulates Poplar Bluff Pws?

EPA lists Poplar Bluff 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 14 active systems in Butler County (57%) are also owned by a local government.

Does Poplar Bluff Pws have drinking water violations?

Of the 12 most recent violations in EPA's records, 12 are health-based, and the most recent began in July 2025. The violations listed here began between August 2016 and July 2025. By type: 8 required treatment not met and 4 contaminant level above the legal limit. The contaminant or rule involved most often is Long Term 2 Enhanced Surface Water Treatment Rule (8 of them). EPA lists 12 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
2025-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2017-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2017-03-01	Required treatment not metFailure to Filter (SWTR) · code 42	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2017-02-01	Required treatment not metFailure to Filter (SWTR) · code 42	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2017-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2017-01-01	Required treatment not metFailure to Filter (SWTR) · code 42	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2016-12-01	Required treatment not metFailure to Filter (SWTR) · code 42	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2016-11-01	Required treatment not metFailure to Filter (SWTR) · code 42	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2016-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2016-10-01	Required treatment not metFailure to Filter (SWTR) · code 42	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2016-09-01	Required treatment not metFailure to Filter (SWTR) · code 42	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	Resolved
2016-08-01	Required treatment not metFailure to Filter (SWTR) · code 42	Long Term 2 Enhanced Surface Water Treatment Rulecode 0800	Yes	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.

Poplar Bluff Pws: frequently asked questions

Who runs Poplar Bluff Pws?

Poplar Bluff Pws (PWSID MO4010656) is a community water system owned by a local government. It is regulated by the MO state drinking water program.

How many people does Poplar Bluff Pws serve?

Poplar Bluff Pws reports serving 17,043 people through 7,667 service connections in Butler County, Missouri.

Where does Poplar Bluff Pws get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does Poplar Bluff Pws have any drinking water violations?

Of the 12 most recent violations in EPA's records, 12 are 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 Poplar Bluff 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, 12 are 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 Poplar Bluff Pws' water quality report?

As a community water system, Poplar Bluff 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 Butler County

Water system	County	Population served	Type	Source
Butler County Pwsd 1	Butler	12,000	Community	Groundwater
Butler County Pwsd 3	Butler	2,600	Community	Groundwater
Butler County Pwsd 2	Butler	1,625	Community	Groundwater
Neelyville Pws	Butler	485	Community	Purchased groundwater
Butler County Pwsd 104	Butler	475	Community	Purchased groundwater
Qulin Pws	Butler	375	Community	Groundwater

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, “Poplar Bluff Pws, PWSID MO4010656, Missouri”, https://aquacensus.com/water-systems/missouri/poplar-bluff-pws-mo4010656 (data as of October 1, 2026).