Public water system · IA4965057
ActivePreston Muni Water Supply
At a glance
Preston Muni Water Supply (PWSID IA4965057) is an active community water system in Jackson County, Iowa. It reports serving 949 people through 478 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
949
Service connections
478
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Preston Muni Water Supply compare with other water systems in Jackson County?
By EPA's size categories, Preston Muni Water Supply is a small system (501 to 3,300 people). Jackson County has 26 active public water systems, and Preston Muni Water Supply is the 3rd-largest of them by population served. Its population served is about twice the county average of 495 people per system, and accounts for 7.4% of the 12,876 people reported by systems filed under the county. Across Iowa, the 1,828 active systems average 1,718 people each. Nationally, the average active community water system reports serving 6,703 people, so Preston Muni Water Supply 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. Iowa has 1,084 active community water systems, 59% of the state's 1,828 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,502 Iowa systems (82%) list groundwater as their primary source.
Who owns and regulates Preston Muni Water Supply?
EPA lists Preston Muni Water Supply as owned by a local government. The IA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 12 of the 26 active systems in Jackson County (46%) are also owned by a local government.
Does Preston Muni Water Supply have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2023. The violations listed here began between August 1999 and July 2023. By type: 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Nitrate and Total coliform bacteria (TCR). EPA lists 2 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 |
|---|---|---|---|---|
| 2023-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1999-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 2 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.
Preston Muni Water Supply: frequently asked questions
Who runs Preston Muni Water Supply?
Preston Muni Water Supply (PWSID IA4965057) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Preston Muni Water Supply serve?
Preston Muni Water Supply reports serving 949 people through 478 service connections in Jackson County, Iowa.
Where does Preston Muni Water Supply 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 Preston Muni Water Supply have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2023. 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 Preston Muni Water Supply'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 2 violations for this system; 1 is health-based, and the most recent began in July 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Preston Muni Water Supply's water quality report?
As a community water system, Preston Muni Water Supply 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 Jackson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Maquoketa Municipal Water | Jackson | 6,128 | Community | Groundwater |
| Bellevue Municipal Utilities | Jackson | 2,363 | Community | Groundwater |
| Sabula Water Supply | Jackson | 506 | Community | Groundwater |
| Miles Water Department | Jackson | 408 | Community | Groundwater |
| Bluff Lake Catfish Farm | Jackson | 400 | Transient non-community | Groundwater |
| Andrew Water Supply | Jackson | 380 | 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, “Preston Muni Water Supply, PWSID IA4965057, Iowa”, https://aquacensus.com/water-systems/iowa/preston-muni-water-supply-ia4965057 (data as of October 1, 2026).