Water Quality in Mason City, IA (50401)
EPA violation data for public water systems serving ZIP code 50401.
Past Health-Based Violations
6 health-based violations were found in the past 5 years, meaning contaminant levels exceeded federal safety limits. All have since been resolved. There are also 12 monitoring/reporting violations.
More violations than 77% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
28,703
Population
39
Water Systems
18
Violations (5yr)
6
Health-Based
Location
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Water Systems Serving This Area (39)
Mason City Water Department
All resolvedCamp At The Wood'S
Heidelberg Materials Us Cement Llc
The Rose Bowl
Servicemaster Mason City
Lime Creek Conservation Area
Camp At The Woods
All resolvedOakwood Park Water Association
Pine Creek Golf Course
6 health-basedWayne Feeds Division
Strnad Park-Cerro Gordo Co Con
Mitchell Transportation Co.
Willow Pointe
Frontier Club&Park View Drive-
Ziegler Cat (Mason City)
Ashley Inn Motel
Ball Breakers
Mason City Red Power Inc
Central Heights School
Wilkinson Pioneer Park
Linn Grove Park
United Sugars Corporation
Strand Pk-Cerro Gordo Conserva
Dot-2 (Decorah Maint Garage)
Dot-2 (Fishfarm Ra New Albin)
Dot-2 (Humboldt Rest Area)
Winnebago River Court
Dot-2 (Latimer Maint Garage)
Dot-2 (Hanlontown Maint Gar.)
Caravelle Restaurant
Golden Oval Eggs
Dot-2 (Dist2 Mt Lab-Masoncity)
Diamond Rose Bowl Corporation
Dot-2 (Eagle Grove Rest Area)
Shell Rock River Green Belt
Pepsi Cola Bottling Co.
Mason City Motel
Dot-2 (Clarion Rest Area)
Dot-2 (Lakota Maint Garage)
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
At high levels, nitrate can cause blue baby syndrome in infants.
Similar to nitrate — harmful to infants at high levels.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2022
How Does This Compare?
Mason City (50401) has more violations than 77% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 18.
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.
Reverse Osmosis System
One of the few filtration methods effective at removing nitrates and nitrites. Essential for households with infants.
Targets:Nitrate, Nitrite, Dissolved Solids
Look for:NSF/ANSI 58 certified
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.