Water Quality in Rancho Cucamonga, CA (92317)
EPA violation data for public water systems serving ZIP code 92317.
No Health-Based Violations
None of the 15 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.
916
Population
15
Water Systems
2
Violations (5yr)
0
Health-Based
Location
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Water Systems Serving This Area (15)
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
Agua Fria Msc
Dogwood Blue Jay Cyn Imp
Clawa Blue Jay Resort System
Upper Little Bear Mountain Club
Church Of Spiritual Technology
Contaminants Found
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
Missed testing deadlines — not a detection of bacteria.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jul 2025
Copper (Cu)
Exceeds limitSampled: Jan 2024
How Does This Compare?
Rancho Cucamonga (92317) 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.