Public water system · MN1070006
ActiveLake Crystal
At a glance
Lake Crystal (PWSID MN1070006) is an active community water system in Blue Earth County, Minnesota. It reports serving 2,554 people through 945 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; 2 are health-based, and the most recent began in April 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,554
Service connections
945
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lake Crystal compare with other water systems in Blue Earth County?
By EPA's size categories, Lake Crystal is a small system (501 to 3,300 people). Blue Earth County has 63 active public water systems, and Lake Crystal is the 3rd-largest of them by population served. Its population served is about 174% above the county average of 931 people per system, and accounts for 4.4% of the 58,656 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 Lake Crystal is about 62% 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 Lake Crystal?
EPA lists Lake Crystal 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. 17 of the 63 active systems in Blue Earth County (27%) are also owned by a local government.
Does Lake Crystal have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in April 2012. The violations listed here began between August 1993 and April 2012. By type: 2 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 3 as resolved 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. 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 |
|---|---|---|---|---|
| 2012-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2001-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
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.
Lake Crystal: frequently asked questions
Who runs Lake Crystal?
Lake Crystal (PWSID MN1070006) is a community water system owned by a local government. It is regulated by the MN state drinking water program.
How many people does Lake Crystal serve?
Lake Crystal reports serving 2,554 people through 945 service connections in Blue Earth County, Minnesota.
Where does Lake Crystal 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 Lake Crystal have any drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in April 2012. 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 Lake Crystal'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; 2 are health-based, and the most recent began in April 2012. For current results, consult the system's annual water quality report, EPA ECHO, or the MN state drinking water program.
Where can I find Lake Crystal's water quality report?
As a community water system, Lake Crystal 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 Blue Earth County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mankato | Blue Earth | 42,803 | Community | Groundwater under influence of surface water |
| Eagle Lake | Blue Earth | 3,268 | Community | Groundwater |
| Mapleton | Blue Earth | 1,756 | Community | Groundwater |
| Madison Lake | Blue Earth | 1,017 | Community | Groundwater |
| Saint Clair | Blue Earth | 846 | Community | Groundwater |
| Good Thunder | Blue Earth | 583 | 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, “Lake Crystal, PWSID MN1070006, Minnesota”, https://aquacensus.com/water-systems/minnesota/lake-crystal-mn1070006 (data as of October 1, 2026).