Water Quality in Waukesha, WI (53018)
EPA violation data for public water systems serving ZIP code 53018.
Active Health Violations
62 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 96% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
8,201
Population
72
Water Systems
99
Violations (5yr)
62
Health-Based
Location
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Water Systems Serving This Area (72)
Waukesha Water Utility
54 health-basedDelafield Convenience
Hope Lake Country Church
St Johns Northwestern Academies
2 health-basedLumber Inn
Delafield Waterworks
Christ The King Lutheran Church Delafield
Arbors
1 health-basedWi Dnr Glacial Drumlin Trail Sullivan Rst Ar
1 health-basedCornerstone Church
Delafield Hotel
803 Genesee St
2 health-basedRuggeris Ristorante
Stolleys Hogg Alley
Daybreak Center
Zin-Uncommon California Italian Restaurant
Country Aire Apartments 2
Pilgrim Place Office Park
All resolvedDelafield Presbyterian Church
Saxes Dining And Banquets
Hendrix Llc
Country Aire Apartments 3
Wholly Cow Frozen Custard
645 Wells St
705 Genesee Street
All resolvedTipsy Turtle
Kurts Steak House
Kettle Moraine Standard At 1-94
Mazatlan
Angelinas Ristorante
Delafield Inn
River Valley Apts South
1 health-basedRiver Valley Apts North
All resolvedBack To Bread
Oconomowoc Lakes Plaza
Kar-Tech Inc
440 Wells St
Country Pride Motel
524 Milwaukee St
Kettle Moraine Prof Bldg
Riverside Tavern
Delafield Library & City Hall
Delafield City Hall
David Schlaak Dds
American Legion Post 196
Clearview Home Corporation
Kettle Moraine Dental & Coffee Trader
St John Chrysostom Episcopal Rectory & Hall
Delafield Town Hall
Chase Bank Of Delafield
Firemans Park
Pavilions At Eagles Bend
Sanctuary Of Delafield
1 health-basedNu Attitude
Delafield Town Hall
Mama Ds Coffee
715 Genesee St
Garys Auto Repair
Fish Hatchery Center
Wells St Station 425 West
All resolvedPersonal Touch Advertising
Light House East
Martys Pizza
St Johns Warming Hut
Riverview Condo #2
Lang Building
Riverview Condo #1
Sun Valley Motel
Jim Horneck Taxidermist
Cushing Park
528 Wells St
Wells St Station 435 East
All resolvedContaminants Found
Missed testing deadlines — not a detection of bacteria.
Annual water quality report delivery requirement.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Used to disinfect water — generally safe at regulated levels.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jun 2025
How Does This Compare?
Waukesha (53018) has more violations than 96% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 99.
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
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 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.