Public water system · IA8637079
ActiveGarwin Water Supply
At a glance
Garwin Water Supply (PWSID IA8637079) is an active community water system in Tama County, Iowa. It reports serving 481 people through 224 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in July 1986.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
481
Service connections
224
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Garwin Water Supply compare with other water systems in Tama County?
By EPA's size categories, Garwin Water Supply is a very small system (500 people or fewer). Tama County has 13 active public water systems. Its population served is well below the county average of 1,947 people per system, and accounts for 1.9% of the 25,305 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 Garwin 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. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 156 Iowa systems (8.5%) list purchased groundwater as their primary source.
Who owns and regulates Garwin Water Supply?
EPA lists Garwin 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. 10 of the 13 active systems in Tama County (77%) are also owned by a local government.
Does Garwin Water Supply have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 1986. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. EPA lists 1 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 |
|---|---|---|---|---|
| 1986-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
The one violation in EPA's records.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.
Garwin Water Supply: frequently asked questions
Who runs Garwin Water Supply?
Garwin Water Supply (PWSID IA8637079) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Garwin Water Supply serve?
Garwin Water Supply reports serving 481 people through 224 service connections in Tama County, Iowa.
Where does Garwin Water Supply get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does Garwin Water Supply have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 1986. 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 Garwin 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 one violation for this system; it is not health-based, and the most recent began in July 1986. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Garwin Water Supply's water quality report?
As a community water system, Garwin 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 Tama County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Poweshiek Water Association | Tama | 13,920 | Community | Groundwater |
| Tama Water Supply | Tama | 3,130 | Community | Groundwater |
| Toledo Water Supply | Tama | 2,399 | Community | Groundwater |
| Traer Municipal Water Plant | Tama | 1,583 | Community | Groundwater |
| Dysart Water Supply | Tama | 1,281 | Community | Purchased groundwater |
| Iowa Premium LLC | Tama | 841 | Non-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, “Garwin Water Supply, PWSID IA8637079, Iowa”, https://aquacensus.com/water-systems/iowa/garwin-water-supply-ia8637079 (data as of October 1, 2026).