Public water system · MI0005370
ActivePlainfield Township
At a glance
Plainfield Township (PWSID MI0005370) is an active community water system in Kent County, Michigan. It reports serving 42,271 people through 10,586 service connections. Its primary water source is groundwater under influence of surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in January 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
42,271
Service connections
10,586
Primary source
GU
Groundwater under influence of surface water
System type
CWS
Community water system
System record
How does Plainfield Township compare with other water systems in Kent County?
By EPA's size categories, Plainfield Township is a large system (10,001 to 100,000 people). Kent County has 397 active public water systems, and Plainfield Township is the 3rd-largest of them by population served. Its population served is about 26 times the county average of 1,634 people per system, and accounts for 6.5% of the 648,694 people reported by systems filed under the county. Across Michigan, the 10,599 active systems average 847 people each. Nationally, the average active community water system reports serving 6,703 people, so Plainfield Township is about 6.3 times 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. Michigan has 1,332 active community water systems, 13% of the state's 10,599 active systems. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules. 11 Michigan systems (0.1%) list groundwater under influence of surface water as their primary source.
Who owns and regulates Plainfield Township?
EPA lists Plainfield Township as owned by a local government. The MI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 17 of the 397 active systems in Kent County (4.3%) are also owned by a local government.
Does Plainfield Township have drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in January 2017. The violations listed here began between April 2007 and January 2017. By type: 2 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2017-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2016-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2007-04-01 | Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38 | Interim Enhanced Surface Water Treatment Rulecode 0300 | No | Resolved |
All 3 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.
Plainfield Township: frequently asked questions
Who runs Plainfield Township?
Plainfield Township (PWSID MI0005370) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Plainfield Township serve?
Plainfield Township reports serving 42,271 people through 10,586 service connections in Kent County, Michigan.
Where does Plainfield Township get its water?
EPA SDWIS lists this system's primary water source as groundwater under influence of surface water. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules.
Does Plainfield Township have any drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in January 2017. 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 Plainfield Township'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 3 violations for this system; 2 are health-based, and the most recent began in January 2017. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Plainfield Township's water quality report?
As a community water system, Plainfield Township 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 Kent County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Grand Rapids | Kent | 306,901 | Community | Surface water |
| Wyoming | Kent | 72,125 | Community | Surface water |
| Byron-Gaines Utility Authority | Kent | 37,464 | Community | Purchased surface water |
| Kentwood | Kent | 36,072 | Community | Purchased surface water |
| Grandville | Kent | 15,948 | Community | Purchased surface water |
| East Grand Rapids | Kent | 11,637 | 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, “Plainfield Township, PWSID MI0005370, Michigan”, https://aquacensus.com/water-systems/michigan/plainfield-township-mi0005370 (data as of October 1, 2026).