Public water system · MN1690009
ActiveCook
At a glance
Cook (PWSID MN1690009) is an active community water system in St. Louis County, Minnesota. It reports serving 574 people through 219 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in January 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
574
Service connections
219
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cook compare with other water systems in St. Louis County?
By EPA's size categories, Cook is a small system (501 to 3,300 people). St. Louis County has 356 active public water systems. Its population served is about 14% above the county average of 505 people per system, and accounts for 0.3% of the 179,795 people reported by systems filed under the county. Across Minnesota, the 6,465 active systems average 820 people each. Nationally, the average active community water system reports serving 6,703 people, so Cook 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. Minnesota has 987 active community water systems, 15% of the state's 6,465 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,261 Minnesota systems (97%) list groundwater as their primary source.
Who owns and regulates Cook?
EPA lists Cook as owned by a local government. The MN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 38 of the 356 active systems in St. Louis County (11%) are also owned by a local government.
Does Cook have drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in January 2014. The violations listed here began between April 2003 and January 2014. By type: 3 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Total trihalomethanes (TTHM), Haloacetic acids (HAA5), Lead and Copper Rule and Total coliform bacteria (TCR). EPA lists 4 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 |
|---|---|---|---|---|
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2007-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2003-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 4 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.
Cook: frequently asked questions
Who runs Cook?
Cook (PWSID MN1690009) is a community water system owned by a local government. It is regulated by the MN state drinking water program.
How many people does Cook serve?
Cook reports serving 574 people through 219 service connections in St. Louis County, Minnesota.
Where does Cook 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 Cook have any drinking water violations?
EPA's records list 4 violations for this system; 1 is health-based, and the most recent began in January 2014. 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 Cook'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 4 violations for this system; 1 is health-based, and the most recent began in January 2014. For current results, consult the system's annual water quality report, EPA ECHO, or the MN state drinking water program.
Where can I find Cook's water quality report?
As a community water system, Cook 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. Louis County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Duluth | St. Louis | 86,859 | Community | Surface water |
| Hibbing | St. Louis | 16,028 | Community | Groundwater |
| Virginia | St. Louis | 8,361 | Community | Surface water |
| Hermantown | St. Louis | 7,215 | Community | Purchased surface water |
| Chisholm | St. Louis | 4,940 | Community | Surface water |
| Eveleth | St. Louis | 3,770 | Community | 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, “Cook, PWSID MN1690009, Minnesota”, https://aquacensus.com/water-systems/minnesota/cook-mn1690009 (data as of October 1, 2026).