Water Quality in 55018 — Dennison, MN
EPA data for Dennison
Data source: U.S. Environmental Protection Agency (EPA) SDWIS Last verified: March 16, 2026
Your Water System
ZIP code 55018 in Dennison, Minnesota is served by Dennison (EPA ID: MN1250021). This system provides water to approximately 220 people from groundwater sources.
Lead & Copper in Your Water
No Lead & Copper Rule sampling data available for systems serving this ZIP code.
Violation Summary
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| April 1, 2025 | Gross Alpha | Health-based | Unresolved |
| April 1, 2025 | Gross Alpha | Health-based | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for water systems serving this ZIP code:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting | 2 | No |
| Revised Total Coliform Rule | Microbiological | 2 | No |
| Gross Alpha | Radionuclides | 2 | Yes |
Need help with your water quality?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
What You Can Do
- Request your water system’s Consumer Confidence Report (CCR) — Your utility is required to publish this annually
- Consider a home water test — Independent testing can reveal issues in your specific plumbing
- Install a certified water filter — NSF-certified filters can address specific contaminants
- Contact your water provider — Ask about current treatment and any ongoing remediation
Need help with water testing or filtration?
Call to get connected with a local professional in your area.
Call (855) 384-4856This is a free service. You will be connected with an independent service provider.
Other Water Quality Reports in Minnesota
- 55003 (Bayport) — 3 violations
- 55006 (Braham)
- 55007 (Brook Park) — 5 violations
- 55008 (Cambridge)
- 55009 (Cannon Falls)
- 55011 (Cedar)
- 55012 (Center City) — 3 violations
- 55013 (Chisago City)
- 55014 (Circle Pines)
- 55016 (Cottage Grove) — 1 violation
- 55019 (Dundas) — 2 violations
- 55021 (Faribault) — 2 violations
- 55024 (Farmington)
- 55025 (Forest Lake) — 2 violations
- 55076 (Inver Grove Heights) — 8 violations
- 55078 (Stacy)
- 55082 (Stillwater) — 4 violations
- 55305 (Hopkins)
- 55306 (Burnsville)
- 55311 (Osseo)
Nearby Water Quality Reports
- 55009 (Cannon Falls) — 7 mi
- 55019 (Dundas) — 12 mi — 2 violations
- 55021 (Faribault) — 19 mi — 2 violations
- 55024 (Farmington) — 19 mi
- 55306 (Burnsville) — 27 mi
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Dennison (MN1250021) on EPA.gov.
Frequently Asked Questions
Is the tap water in 55018 safe to drink?
Dennison’s water system has recorded 2 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
Where does 55018’s water come from?
The primary water source for this area is groundwater. Dennison serves approximately 220 people.
How can I get my water tested?
Contact your local water utility for a free water quality report, or hire a certified lab for independent home water testing. The EPA recommends testing annually if you use a private well.
Does 55018 have lead in the water?
No Lead and Copper Rule sampling data is currently available in EPA records for water systems serving ZIP code 55018. If you are concerned about lead, contact your water utility or have your tap water independently tested.
What is the radon risk in 55018?
Radon zone data is not available for ZIP code 55018. The EPA recommends testing all homes for radon regardless of location, as radon levels can vary significantly even within the same neighborhood.