Public water system · MI0003520
ActiveKalamazoo
At a glance
Kalamazoo (PWSID MI0003520) is an active community water system in Kalamazoo County, Michigan. It reports serving 192,992 people through 41,411 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
192,992
Service connections
41,411
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Kalamazoo compare with other water systems in Kalamazoo County?
By EPA's size categories, Kalamazoo is a very large system (more than 100,000 people). Kalamazoo County has 188 active public water systems, and Kalamazoo is the largest of them by population served. Its population served is about 128 times the county average of 1,513 people per system, and accounts for 68% of the 284,488 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 Kalamazoo is about 29 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 means the system draws its water from wells or springs fed by underground aquifers. 10,214 Michigan systems (96%) list groundwater as their primary source.
Who owns and regulates Kalamazoo?
EPA lists Kalamazoo 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. 9 of the 188 active systems in Kalamazoo County (4.8%) are also owned by a local government.
Does Kalamazoo have drinking water violations?
EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in July 2025. The violations listed here began between January 1994 and July 2025. By type: 4 required treatment not met, 2 monitoring and reporting and 1 reporting. The contaminant or rule involved most often is Lead and Copper Rule (4 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2025-07-02 | ReportingNotification, Known or Potential LSL · code 4H | Lead and Copper Rule Revisionscode 5200 | No | Unaddressed |
| 2019-07-01 | Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2019-01-01 | Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2018-07-01 | Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2018-01-01 | Required treatment not metWQP Entry Point/Tap Treatment Technique Non-Compliance · code 59 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Archived |
All 7 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.
Kalamazoo: frequently asked questions
Who runs Kalamazoo?
Kalamazoo (PWSID MI0003520) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Kalamazoo serve?
Kalamazoo reports serving 192,992 people through 41,411 service connections in Kalamazoo County, Michigan.
Where does Kalamazoo 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 Kalamazoo have any drinking water violations?
EPA's records list 7 violations for this system; 4 are health-based, and the most recent began in July 2025. 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 Kalamazoo'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 7 violations for this system; 4 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Kalamazoo's water quality report?
As a community water system, Kalamazoo 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 Kalamazoo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Portage | Kalamazoo | 46,292 | Community | Groundwater |
| Pfizer | Kalamazoo | 4,000 | Non-transient non-community | Groundwater |
| Vicksburg | Kalamazoo | 2,906 | Community | Groundwater |
| Galesburg | Kalamazoo | 2,377 | Community | Groundwater |
| Mdot - Galesburg Rest Area | Kalamazoo | 1,932 | Transient non-community | Groundwater |
| Schoolcraft | Kalamazoo + 1 more | 1,405 | 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, “Kalamazoo, PWSID MI0003520, Michigan”, https://aquacensus.com/water-systems/michigan/kalamazoo-mi0003520 (data as of October 1, 2026).