Water Quality in Rancho Cucamonga, CA (92333)
EPA violation data for public water systems serving ZIP code 92333.
No Health-Based Violations
None of the 20 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There are5 monitoring/reporting violations (missed testing deadlines), all resolved.
Better than 53% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
302
Population
20
Water Systems
5
Violations (5yr)
0
Health-Based
Location
Loading map...
Water Systems Serving This Area (20)
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
Ymca Camp Whittle
All resolvedShady Cove
Big Pine Flats Admin & Recreation
Ymca Camp High Sierra
Ymca Camp Of Los Angeles #2
Camp Round Meadow
North Shore Mwc
All resolvedCamp Heart Bar Equestrian Group
South Fork Campground
Crab Flats Campground
Contaminants Found
At high levels, nitrate can cause blue baby syndrome in infants.
Missed testing deadlines — not a detection of bacteria.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
Copper (Cu)
Exceeds limitSampled: Jan 2025
How Does This Compare?
Rancho Cucamonga (92333) has more violations than 53% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 5, 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.