Dennison
PWSID: MN1250021 · Dennison, MN · Serves 220 people
According to EPA Safe Drinking Water Information System (SDWIS), Dennison (PWSID MN1250021) in Dennison, MN is listed as a CWS water system covering about 220 people. The same extract lists 5 health-based violation records spanning 2025-2025. Those 5 health-based rows for Dennison cover contaminants such as Gross Alpha, Excl. Radon and U; they remain historical EPA registry entries, not a current compliance or drinkability score.
Dennison has 5 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 1 distinct EPA contaminant code appears in this system's record, including Gross Alpha, Excl. Radon and U. Recorded violations span 2025–2025. Day-to-day primacy enforcement for this system runs through the Minnesota drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Minnesota state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- MN1250021
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Dennison, MN
- Population Served
- 220
- Health Violations
- Yes (5)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Gross Alpha, Excl. Radon and U | 5 | 5 |
Violation History (5)
| Contaminant | Health | Date |
|---|---|---|
| Gross Alpha, Excl. Radon and U | Yes | Oct 1, 2025 |
| Gross Alpha, Excl. Radon and U | Yes | Jul 1, 2025 |
| Gross Alpha, Excl. Radon and U | Yes | Apr 1, 2025 |
| Gross Alpha, Excl. Radon and U | Yes | Apr 1, 2025 |
| Gross Alpha, Excl. Radon and U | Yes | Apr 1, 2025 |
Frequently Asked Questions
What does EPA SDWIS list for Dennison?
How many people does Dennison serve?
What violations does Dennison have?
What contaminants have been found in Dennison water?
Compare beyond Minnesota
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest Dennison on cumulative violation count (5) and EPA-reported population served (220). Violation-count peers include Jemez Pueblo, Acoma Main, OMAHA TRIBE PWS.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
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About This Data
Dennison (MN1250021) is drawn from EPA SDWIS. Nearby county systems in this extract include Red Wing; PRAIRIE ISLAND; Cannon Falls; Pine Island. Health-based rows (5 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.