ZIP Code 55335 Water Quality & Testing Report
Gibbon, MN · Sibley County County · Updated for 2026
Is Tap Water Safe to Drink in ZIP 55335 (Gibbon, MN)?
Caution / Filtration Recommended: Tap water in ZIP code 55335 (Gibbon, MN) has compliance concerns, earning an EPA Safety Grade of F (33/100) due to 15 health violation(s) and 1.0 ppb lead. While treated by Gibbon, residents are advised to use an NSF/ANSI 53 certified water filter for drinking and cooking.
Water Safety Grade
Failing — Serious compliance issues
Health Violations
15
Total Violations
15
Lead Risk
High
Contaminants
1
Active Water Quality Issues Detected
EPA records show 8 unresolved violations. Contact Gibbon for current status.
About Tap Water in ZIP Code 55335
Tap water in ZIP code 55335 (Gibbon, MN) is distributed by Gibbon (EPA ID: MN1720004), serving approximately 790 residents. Based on EPA Safe Drinking Water Act compliance records, this system receives a water safety grade of F with a composite quality score of 33/100.
Water System
Gibbon
EPA ID: MN1720004
Water Source
Ground Water
Population Served
790 residents
County
Sibley County County, Minnesota
Lead Levels in ZIP 55335
EPA action level: 15 ppb | Public health goal: 0 ppb
Lead Level: 1.0 ppb — Very Low
Lead exposure risk in 55335 is rated High. EPA models estimate a 60% exposure probability based on housing and infrastructure age.
EPA action level: 1.3 mg/L
EPA model estimate based on housing age and infrastructure
Water Hardness & Mineral Content
Grains per gallon (GPG) & Parts per million (PPM / mg/L)
Water in ZIP 55335 is Hard (158 mg/L / 9.2 GPG). Residents may notice white mineral spots on glassware, reduced soap efficiency, and mineral scale on faucets and showerheads.
Grains per gallon
Parts per million CaCO3
Official EPA SDWIS Database Entry
Utility: Gibbon · PWSID: MN1720004
Violation History
Past 5 years — EPA SDWIS data
Gibbon has recorded 15 health-based violations out of 15 total violations over the past 5 years. 8 violations remain unresolved in EPA tracking records.
Regulatory compliance risk for this utility is rated Critical based on past reporting and enforcement records.
Contaminants Detected
Contaminants with health-based violations on record
EPA records identify 1 contaminant with health-based violations in the past 5 years: Barium.
⚖ Enforcement Actions
Water Source & Environmental Factors
Ground Water
This system draws water from underground aquifers. Groundwater is naturally filtered through soil and rock, but can still contain naturally occurring minerals like arsenic, radium, or nitrates.
Highest potential
% of household income spent on energy — indicator of older infrastructure
EPA Radon Zone 1 — highest potential for radon in indoor air. Homeowners should test their home for radon and consider mitigation if levels exceed 4 pCi/L.
Water Quality Testing in ZIP 55335
Tap Water & Well Testing Recommendations
Residents in ZIP code 55335 served by Gibbon can test tap water or private well systems to verify water purity. Testing detects hidden contaminants before they impact family health.
Tap Water Testing Steps
- 1.Conduct a certified lead check if your home was constructed before 1986.
- 2.Use certified lab testing kits rather than uncalibrated test strips for regulated compliance.
- 3.Sample water from both your kitchen faucet and water heater to compare line purity.
Private Well Testing Steps
- •Test for Coliform bacteria and Nitrates annually.
- •Test for heavy metals, radon, and PFAS every 3 years.
- •Send samples to a state-certified drinking water laboratory recognized by Minnesota Department of Health.
🛡 What Should You Do? — ZIP 55335 Recommendations
Serious water quality concerns — action recommended
- 🚨 Install a certified NSF/ANSI 53 or 58 (reverse osmosis) filter immediately for drinking and cooking
- 🚨 Do not give unfiltered water to children, pregnant women, or immunocompromised individuals
- 🚨 Contact Gibbon to request the current violation status and corrective action plan
- 🚨 Report concerns to your state environmental agency or call the EPA hotline: 1-800-426-4791
- 🚨 Consider having your home's tap water independently tested by a certified lab
Recommended Water Treatment Systems:
NSF 53 Lead Pitcher Filter
Certified to remove lead. Recommended for immediate protection.
NSF 58 Under-Sink RO System
Reverse Osmosis system certified to remove PFAS, heavy metals, and viruses.
Frequently Asked Questions — ZIP 55335 Water Quality
Is tap water safe to drink in ZIP code 55335?+
How do I get my water tested in ZIP 55335 (Gibbon, MN)?+
How hard is the tap water in 55335?+
Should I test private well water in 55335?+
What is the lead level in 55335 tap water?+
Is there an active boil water notice in 55335?+
Who provides tap water to 55335?+
What water filter should I use in 55335?+
Data Sources & Methodology
Water quality data for ZIP code 55335 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by Gibbon. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →