Public water system · IA6727028
ActiveMapleton Municipal Water Plant
At a glance
Mapleton Municipal Water Plant (PWSID IA6727028) is an active community water system in Monona County, Iowa. It reports serving 1,124 people through 629 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in December 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,124
Service connections
629
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Mapleton Municipal Water Plant compare with other water systems in Monona County?
By EPA's size categories, Mapleton Municipal Water Plant is a small system (501 to 3,300 people). Monona County has 14 active public water systems, and Mapleton Municipal Water Plant is the 2nd-largest of them by population served. Its population served is about 143% above the county average of 462 people per system, and accounts for 17% of the 6,465 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 Mapleton Municipal Water Plant 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 Mapleton Municipal Water Plant?
EPA lists Mapleton Municipal Water Plant 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. 9 of the 14 active systems in Monona County (64%) are also owned by a local government.
Does Mapleton Municipal Water Plant have drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in December 2023. The violations listed here began between January 1994 and December 2023. By type: 8 contaminant level above the legal limit, 3 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Nitrate (9 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 |
|---|---|---|---|---|
| 2023-12-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2016-02-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2015-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 2000-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 1998-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1996-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 1995-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 1994-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 1994-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 1994-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 1994-01-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Nitratecode 1040 | No | 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.
Mapleton Municipal Water Plant: frequently asked questions
Who runs Mapleton Municipal Water Plant?
Mapleton Municipal Water Plant (PWSID IA6727028) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Mapleton Municipal Water Plant serve?
Mapleton Municipal Water Plant reports serving 1,124 people through 629 service connections in Monona County, Iowa.
Where does Mapleton Municipal Water Plant 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 Mapleton Municipal Water Plant have any drinking water violations?
Of the 12 most recent violations in EPA's records, 8 are health-based, and the most recent began in December 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 Mapleton Municipal Water Plant'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, 8 are health-based, and the most recent began in December 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 Mapleton Municipal Water Plant's water quality report?
As a community water system, Mapleton Municipal Water Plant 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 Monona County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Onawa Municipal Water Plant | Monona | 2,906 | Community | Groundwater |
| Whiting Water Supply | Monona | 727 | Community | Groundwater |
| Ute Water Supply | Monona | 338 | Community | Groundwater |
| Onawa Koa | Monona | 250 | Transient non-community | Groundwater |
| Timber Ridge Lodge Recreation, Ltd. | Monona | 250 | Transient non-community | Groundwater |
| Blencoe Municipal Waterworks | Monona | 224 | 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, “Mapleton Municipal Water Plant, PWSID IA6727028, Iowa”, https://aquacensus.com/water-systems/iowa/mapleton-municipal-water-plant-ia6727028 (data as of October 1, 2026).