Water Quality in Fresno, CA (93631)
EPA violation data for public water systems serving ZIP code 93631.
Active Health Violations
22 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 88% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
17,583
Population
42
Water Systems
40
Violations (5yr)
22
Health-Based
Location
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Water Systems Serving This Area (42)
City Of Fresno
Cws - Visalia
City Of Clovis
Tulare, City Of
Porterville, City Of
1 health-basedHanford, City Of
1 health-basedLemoore, City Of
13 health-basedCorcoran, City Of
Lemoore Naval Air Station
Avenal, City Of
5 health-basedKingsburg, City Of
All resolvedHmc Group Cold Storage
Kings River Elementary School
Kings River Rv Resort, Llc
Clay Joint Elementary School
1 health-basedCamp Sierra
All resolvedGuardian Industries Llc
Selma Exxon Tiger Mart
Kings River Golf Course
Victorian Gardens Of Two Sisters
Usa Petro Super Stop
All resolvedKingsburg Gun Club
1 health-basedFairway Mutual Water Co
Kings River Estates - Inactive
Kings River Estates Mutual Water Company
Kings River Market
B&C Packing
Viking Rv Park
All resolvedGolden Key Apartments
West Tech Industrial Park
Open Sky Ranch
Garden Apartments
Ripperdan Dehydrator
Skf County Sanitation District
Jackson Family Farm Stay
Poplar Apartments
Shop N Go
Melis Grocery
Cacciatore Fine Wines & Olive Oil
Kings River Park
Fairway Mutual Water System
Del Monte Corp, Plant No 25
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Annual water quality report delivery requirement.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
Fresno (93631) has more violations than 88% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 40.
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.