Public water system · MO4010012
ActiveAlton Pws
At a glance
Alton Pws (PWSID MO4010012) is an active community water system in Oregon County, Missouri. It reports serving 1,000 people through 453 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in July 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,000
Service connections
453
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Alton Pws compare with other water systems in Oregon County?
By EPA's size categories, Alton Pws is a small system (501 to 3,300 people). Oregon County has 7 active public water systems, and Alton Pws is the 2nd-largest of them by population served. Its population served is about 47% above the county average of 678 people per system, and accounts for 21% of the 4,746 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 Alton 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 Alton Pws?
EPA lists Alton 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. 6 of the 7 active systems in Oregon County (86%) are also owned by a local government.
Does Alton Pws have drinking water violations?
EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in July 2019. The violations listed here began between November 2001 and July 2019. By type: 5 contaminant level above the legal limit, 3 monitoring and reporting, 2 public notice, recordkeeping or other and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (8 of them). EPA lists 11 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 |
|---|---|---|---|---|
| 2019-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2016-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-09-03 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2015-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2015-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2015-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2011-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 11 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.
Alton Pws: frequently asked questions
Who runs Alton Pws?
Alton Pws (PWSID MO4010012) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Alton Pws serve?
Alton Pws reports serving 1,000 people through 453 service connections in Oregon County, Missouri.
Where does Alton 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 Alton Pws have any drinking water violations?
EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in July 2019. 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 Alton 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. EPA's records list 11 violations for this system; 5 are health-based, and the most recent began in July 2019. For current results, consult the system's annual water quality report, EPA ECHO, or the MO state drinking water program.
Where can I find Alton Pws' water quality report?
As a community water system, Alton 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 Oregon County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Thayer Pws | Oregon | 2,200 | Community | Groundwater |
| Oregon County Pwsd 1 | Oregon | 900 | Community | Groundwater |
| Couch R 1 School | Oregon | 264 | Non-transient non-community | Groundwater |
| Koshkonong Pws | Oregon | 212 | Community | Groundwater |
| Oregon County Pwsd 2 | Oregon | 120 | Community | Groundwater |
| Usfs Greer Crossing | Oregon | 50 | 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, “Alton Pws, PWSID MO4010012, Missouri”, https://aquacensus.com/water-systems/missouri/alton-pws-mo4010012 (data as of October 1, 2026).