Water Quality in Rancho Cucamonga, CA (92301)
EPA violation data for public water systems serving ZIP code 92301.
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 78% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
38,577
Population
27
Water Systems
19
Violations (5yr)
2
Health-Based
Location
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Water Systems Serving This Area (27)
Chino Basin Mwd
San Gabriel Valley Wc - Fontana
San Bernardino City
Cucamonga Valley Water District
Ontario Municipal Utilities Company
Victorville Water District
San Bernardino Valley Wd
East Valley Water District
West Valley Water District
Hesperia Wd
Adelanto, City Of
All resolvedUs Army Fort Irwin
High Desert Detention Center
Golden Pond Rv/M Overland
Arcola Plaza
Barstow Army Heliport
Abraham Maida Water System
El Mirage Market
Chamisal Mwc
1 health-basedEl Mirage School
1 health-based395 Cycle Park
Montgomery Homes
Murphy S Cafe
Lazy 3 Cafe
Federal Correctional Institution - Inac
Ducommun Aerostructures
Contaminants Found
Missed testing deadlines — not a detection of bacteria.
At high levels, nitrate can cause blue baby syndrome in infants.
Annual water quality report delivery requirement.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2024
How Does This Compare?
Rancho Cucamonga (92301) has more violations than 78% 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
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.