Water Quality in Knoxville, IA (50138)
EPA violation data for public water systems serving ZIP code 50138.
No Health-Based Violations
None of the 16 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There are2 monitoring/reporting violations (missed testing deadlines), all resolved.
Better than 36% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
11,117
Population
16
Water Systems
2
Violations (5yr)
0
Health-Based
Location
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Water Systems Serving This Area (16)
Knoxville Water Works
Marion Co. Rural Water District
Wheel Estates Mhc
Hillock Estates
Hartford Mhc Llc
Marion County Conservation
Vista Village Mhc
Red Rock Lakeview Water Assoc
Martinaches Mobil Home Park
Knoxville Estates
Elk Rock Park - Bridge Area
Clark & Son Sale Barn
Hi Vu Drive In Theater
J B'S
Granger Mobile Home Park
Keener'S Hy-Way Station
Contaminants Found
Similar to nitrate — harmful to infants at high levels.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
Knoxville (50138) has more violations than 36% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 2, most of which are monitoring/reporting issues.
Water Filter Recommendations
No contaminant issues detected. For general protection, a basic carbon filter removes common impurities like chlorine and sediment. Look for NSF/ANSI 42 certified products.