Public water system · IA2537001
ActiveGranger Muni Water Supply
At a glance
Granger Muni Water Supply (PWSID IA2537001) is an active community water system in Dallas County, Iowa. It reports serving 1,654 people through 629 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in January 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,654
Service connections
629
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Granger Muni Water Supply compare with other water systems in Dallas County?
By EPA's size categories, Granger Muni Water Supply is a small system (501 to 3,300 people). Dallas County has 23 active public water systems. Its population served is well below the county average of 6,420 people per system, and accounts for 1.1% of the 147,667 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 Granger 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 Granger Muni Water Supply?
EPA lists Granger 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. 13 of the 23 active systems in Dallas County (57%) are also owned by a local government.
Does Granger Muni Water Supply have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in January 2024. The violations listed here began between January 1988 and January 2024. By type: 3 monitoring and reporting, 1 public notice, recordkeeping or other, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Nitrite (2 of them). EPA lists 4 as resolved, 1 as unaddressed and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2021-04-26 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2020-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2014-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitritecode 1041 | Yes | Resolved |
| 2012-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
| 1988-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 6 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.
Granger Muni Water Supply: frequently asked questions
Who runs Granger Muni Water Supply?
Granger Muni Water Supply (PWSID IA2537001) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Granger Muni Water Supply serve?
Granger Muni Water Supply reports serving 1,654 people through 629 service connections in Dallas County, Iowa.
Where does Granger 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 Granger Muni Water Supply have any drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in January 2024. 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 Granger 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 6 violations for this system; 1 is health-based, and the most recent began in January 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Granger Muni Water Supply's water quality report?
As a community water system, Granger 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 Dallas County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| West Des Moines Water Works | Dallas + 1 more | 73,959 | Community | Purchased surface water |
| Waukee Water Supply | Dallas | 31,823 | Community | Purchased surface water |
| Xenia Rwd (Des Moines) | Dallas | 12,860 | Community | Purchased surface water |
| Perry Municipal Water Works | Dallas | 7,836 | Community | Groundwater |
| Adel Municipal Water Works | Dallas | 6,461 | Community | Groundwater |
| Xenia Rwd (Woodward) | Dallas | 3,465 | Community | Purchased surface water |
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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, “Granger Muni Water Supply, PWSID IA2537001, Iowa”, https://aquacensus.com/water-systems/iowa/granger-muni-water-supply-ia2537001 (data as of October 1, 2026).