Water Quality in Fresno, CA (93657)
EPA violation data for public water systems serving ZIP code 93657.
Active Health Violations
7 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 76% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
36,205
Population
33
Water Systems
19
Violations (5yr)
7
Health-Based
Location
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Water Systems Serving This Area (33)
City Of Fresno
City Of Clovis
City Of Sanger
1 health-basedLone Star School
Kings River Packing Company
All resolvedFairmont School
Centerville School
1 health-basedBlossom Trail Cafe
Merced River Resort
John S Wash Elementary School
Wolf Lakes Park
All resolvedLone Star Dehydrator
1 health-basedKings Park Apartments
1 health-basedH And R Facilities
1 health-basedWonder Valley River Way Ranch
1 health-basedSherwood Forest Golf Club
S&K Mini Mart
Sherwood Forest Mhp
1 health-basedTabernacle Of Praise Church
All resolvedGibbs Water Company
Kings River Winery
Kings River Packing-Centerville
Silver Spur Center/Gallery Row
Sunnyslope Campgrounds
Sanger Sewage Treatment Plant
Chooljian Bros Packing Co
Melkonian Brothers Fruit Stand
Biggers Ponderosa Trailer Park
Trimmer Resort
Oak Knolls Trailer Park
Shady Trailer Park
Trimmer Resort Water System
Pineflat Motel And Trailer
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jul 2025
Copper (Cu)
Exceeds limitSampled: Jan 2024
How Does This Compare?
Fresno (93657) has more violations than 76% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 19.
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
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.