Water Quality in Decorah, IA (52101)
EPA violation data for public water systems serving ZIP code 52101.
Active Health Violations
4 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 89% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
12,706
Population
50
Water Systems
44
Violations (5yr)
4
Health-Based
Location
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Water Systems Serving This Area (50)
Decorah Water Department
Freeport Water District
The Country Express
Washington Prairie Lutheran Church
All resolvedWinneshiek Wildberry Winery
Decorah Business Park
Pulpit Rock Camp Grounds
Decorah Sales Commission
All resolvedBig Canoe Lutheran Church
Back 40
Burr Oak Mercantile & Country Cafe
Seed Savers Exchange
Haugen Hummel, Subdivision 2
North Terrace Mobile Home Park
Silvercrest Golf & Country Club, Inc.
2 health-basedSt John'S Lutheran Church
Decorah Drive-In Theater
Oneota Riverview Care Facility
Nob Hill Supper Club
Matter'S Ball Room
Bluffton Resort
All resolvedGlenwood Lutheran Church
Finholt Construction
Twin Springs Supper Club, L.L.C.
Oneota Country Club
Decorah Fish Hatchery
All resolvedBurr Oak Lutheran Church
Bodensteiner Implement Company
All resolvedBurreson Locker And Grocery
Hesper Lutheran
Norby Farm Fleet
Laura Ingalls Wilder Museum Well
Windridge Implements L.L.C.
All resolvedSmokeys Restaurant And Grill
North Winneshiek Com. School
Pine Bluff 4h Camp
Hesper Lutheran Church (Duplicate)
Barneys Bar And Grill
All resolvedUnder The Stars At Chimney Rock Cg Llc
2 health-basedTwin Springs Camp Area
Henning Commercial Subdivision
Rallc
Holland Bros. Construction
Pinters Garden Center & Pumpkin Patch
Keep On Trucking
Big Springs Well
Haugen Hummel Enterprizes Subd
Hutchinson Family Farm Campground
High Point East
Country View Public Golf Course
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead & Copper Levels
Lead (Pb)
Approaching limitSampled: Jan 2023
How Does This Compare?
Decorah (52101) has more violations than 89% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 44.
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.