Mankato Water Quality
Minnesota
According to EPA SDWIS, Mankato, Minnesota is served by 8 community water systems covering about 43,913 people. The same extract lists 3 health-based violation records, most recently coded 0400 in 2025. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Mankato, Minnesota is delivered through 8 EPA-regulated community water systems serving an estimated 43,913 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 3 violation records across the 8 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 2 distinct EPA contaminant codes: Stage 1 Disinfectants and Disinfection Byproducts Rule, Groundwater Rule. 12 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Minnesota drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| Mankato | 42,803 | 0 | Clean |
| South Bend Township | 325 | 0 | Clean |
| Skyline | 289 | 0 | Clean |
| Rapidan Development Company, Inc. | 164 | 0 | Clean |
| GC Mankato Hill LLC | 140 | 0 | Clean |
| Hillcrest Health Care Center | 94 | 3 | Health |
| Riverbend Homes and More | 60 | 0 | Clean |
| Terrace View East Condominium Assoc. | 38 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| Hillcrest Health Care Center | Stage 1 Disinfectants and Disinfection Byproducts Rule | 2025-01-01 |
| Hillcrest Health Care Center | Groundwater Rule | 2024-10-12 |
| Hillcrest Health Care Center | Groundwater Rule | 2024-10-12 |
What are Mankato's health-based records for?
Mankato's health-based violation records carry 2 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Groundwater Rule | 2 | 1 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | 1 | 1 |
TRI Facilities in Mankato
| Facility | Total Releases |
|---|---|
| Chs Mankato | 3.2M lbs |
| Adm | 2.8M lbs |
| Crown Cork & Seal Co Inc | 418.2K lbs |
| Mankato Energy Center | 271.0K lbs |
| Mps Mankato LLC | 5.8K lbs |
| Ccm - Mankato North | 384 lbs |
| Nortech Systems-Mankato | 2 lbs |
| Rolls-Royce Solutions America Inc. | 0 lbs |
| Big Gain Inc | 0 lbs |
| Hubbard Feeds Inc | 0 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Mankato, Minnesota? ▼
How many water violations does Mankato have in this EPA extract? ▼
What contaminants were found in Mankato water? ▼
How many water systems serve Mankato? ▼
Where does Mankato get its drinking water? ▼
Are there pollution sources near Mankato? ▼
How does Mankato compare in Minnesota?
Of the 729 Minnesota places with at least one community water system on file, Mankato ranks #5 by number of systems (8).
Either side of it: Rochester (9), Cass Lake (8), Shakopee (8), Stillwater (8)
About This Data
Figures here are the current EPA SDWIS extract joined to the 8 community water systems whose service area lists Mankato, ranked against the 729 Minnesota places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.