Public water system · MO3021332
ActivePettis/Johnson/Saline Pwsd 1
At a glance
Pettis/Johnson/Saline Pwsd 1 (PWSID MO3021332) is an active community water system serving Johnson, Saline and Pettis counties, Missouri. It reports serving 1,000 people through 446 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,000
Service connections
446
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Pettis/Johnson/Saline Pwsd 1 compare with other water systems in Missouri?
By EPA's size categories, Pettis/Johnson/Saline Pwsd 1 is a small system (501 to 3,300 people). 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 Pettis/Johnson/Saline Pwsd 1 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. 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 Pettis/Johnson/Saline Pwsd 1?
EPA lists Pettis/Johnson/Saline Pwsd 1 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.
Does Pettis/Johnson/Saline Pwsd 1 have drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in July 2025. The violations listed here began between July 2017 and July 2025. By type: 6 contaminant level above the legal limit, 4 monitoring and reporting, 1 reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (8 of them). EPA lists 11 as resolved and 1 as unaddressed. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2023-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2023-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2018-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2018-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2018-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2018-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2017-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2017-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | 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.
Pettis/Johnson/Saline Pwsd 1: frequently asked questions
Who runs Pettis/Johnson/Saline Pwsd 1?
Pettis/Johnson/Saline Pwsd 1 (PWSID MO3021332) is a community water system owned by a local government. It is regulated by the MO state drinking water program.
How many people does Pettis/Johnson/Saline Pwsd 1 serve?
Pettis/Johnson/Saline Pwsd 1 reports serving 1,000 people through 446 service connections in Johnson, Saline and Pettis counties, Missouri.
Where does Pettis/Johnson/Saline Pwsd 1 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 Pettis/Johnson/Saline Pwsd 1 have any drinking water violations?
Of the 12 most recent violations in EPA's records, 6 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 Pettis/Johnson/Saline Pwsd 1'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. Of the 12 most recent violations in EPA's records, 6 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 Pettis/Johnson/Saline Pwsd 1's water quality report?
As a community water system, Pettis/Johnson/Saline Pwsd 1 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 Johnson County(the first county EPA lists for this system)
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mo American Warrensburg | Johnson | 18,500 | Community | Groundwater |
| Johnson County Pwsd 2 | Johnson | 12,490 | Community | Groundwater |
| Whiteman Air Base | Johnson | 10,106 | Community | Groundwater |
| Johnson County Pwsd 3 | Johnson | 4,700 | Community | Groundwater |
| Johnson County Pwsd 1 | Johnson | 3,730 | Community | Groundwater |
| Knob Noster Pws | Johnson | 2,863 | Community | Groundwater |
Related pages
- All water systems in Johnson County· 15 active
- All water systems in Saline County· 11 active
- All water systems in Pettis County· 30 active
- All Missouri public water systems· 2,943 active
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
- What a drinking water violation notice means
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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, “Pettis/Johnson/Saline Pwsd 1, PWSID MO3021332, Missouri”, https://aquacensus.com/water-systems/missouri/pettis-johnson-saline-pwsd-1-mo3021332 (data as of October 1, 2026).