Public water system · MI0003943
ActiveLockport Township
At a glance
Lockport Township (PWSID MI0003943) is an active community water system in St. Joseph County, Michigan. It reports serving 1,778 people through 700 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, 6 are health-based, and the most recent began in September 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,778
Service connections
700
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lockport Township compare with other water systems in St. Joseph County?
By EPA's size categories, Lockport Township is a small system (501 to 3,300 people). St. Joseph County has 125 active public water systems, and Lockport Township is the 4th-largest of them by population served. Its population served is about 4.6 times the county average of 391 people per system, and accounts for 3.6% of the 48,813 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 Lockport Township 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. 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 Lockport Township?
EPA lists Lockport 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. 10 of the 125 active systems in St. Joseph County (8%) are also owned by a local government.
Does Lockport Township have drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in September 2020. The violations listed here began between June 2004 and September 2020. By type: 6 contaminant level above the legal limit, 5 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Total coliform bacteria (TCR) (11 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 |
|---|---|---|---|---|
| 2020-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2013-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2012-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2010-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2010-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2010-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2008-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
Lockport Township: frequently asked questions
Who runs Lockport Township?
Lockport Township (PWSID MI0003943) is a community water system owned by a local government. It is regulated by the MI state drinking water program.
How many people does Lockport Township serve?
Lockport Township reports serving 1,778 people through 700 service connections in St. Joseph County, Michigan.
Where does Lockport Township 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 Lockport Township have any drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in September 2020. 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 Lockport 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. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in September 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the MI state drinking water program.
Where can I find Lockport Township's water quality report?
As a community water system, Lockport 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 St. Joseph County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Sturgis | St. Joseph | 11,920 | Community | Groundwater |
| Three Rivers | St. Joseph | 7,905 | Community | Groundwater |
| Constantine | St. Joseph | 2,075 | Community | Groundwater |
| White Pigeon | St. Joseph | 1,640 | Community | Groundwater |
| Centreville | St. Joseph | 1,579 | Community | Groundwater |
| Glen Oaks Community College | St. Joseph | 1,233 | 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, “Lockport Township, PWSID MI0003943, Michigan”, https://aquacensus.com/water-systems/michigan/lockport-township-mi0003943 (data as of October 1, 2026).