Water Quality in Onawa, IA (51040)
EPA violation data for public water systems serving ZIP code 51040.
Active Health Violations
2 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 74% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
3,500
Population
19
Water Systems
15
Violations (5yr)
2
Health-Based
Location
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Water Systems Serving This Area (19)
Onawa Municipal Water Plant
Blackbird Bend Casino - Tribal
Casino Omaha Water System
Fuel Plaza - Casinomaha
Blackbird Bend Casino
Onawa Koa
1 health-basedFirst Christian Church Camp
Interchange Service Corp
Lewis And Clark State Park
Camp Onawa
Onawa Country Club
Peters Park
1 health-basedMonona Arboretum-Monona Conser
Preparation Canyon State Park
Oldham Rec Ar-Monona Conservat
Whiting Wds-Monona Conservatio
Huff-Warner Acc-Monona Conserv
Decatur Bend Acc-Monona Conser
Sunset At The Oasis Rv Campground
All resolvedContaminants Found
Missed testing deadlines — not a detection of bacteria.
Used to disinfect water — generally safe at regulated levels.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2022
How Does This Compare?
Onawa (51040) has more violations than 74% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 15.
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.