Water Quality in Rancho Cucamonga, CA (92408)
EPA violation data for public water systems serving ZIP code 92408.
Active Health Violations
8 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 81% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
14,325
Population
72
Water Systems
24
Violations (5yr)
8
Health-Based
Location
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Water Systems Serving This Area (72)
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
Big Bear Administration
1 health-basedHanna Flats Campground
Green Valley Campground
Green Valley Campground
Caltrans, Cactus City Rest Area
Caltrans, Whitewater Rest Area
Cal Trans - C.V. Kane
All resolvedInland Valley Development Agency-Norton
Cal Trans - Desert Oasis
All resolvedCal Trans - Valley Wells
Cal Trans - Fenner
Cal-Trans Wiley Well Rest Stop
South San Bernardino Water Dst
South San Bernardino-North
Caltrans - Mountain Pass Jpoe Cvef
1 health-basedLake Fulmor - Usfs
Lytle Creek Administration Site
1 health-basedDark Canyon Campground - Usfs
All resolvedCinco Poses Camp - Usfs
Marion Mtn/ Fern Basin - Usfs
Vista Grande Station - Usfs
3 health-basedKeenwild Station - Usfs
1 health-basedUsfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Burlington Northern/Santa Fe Rr Co
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Falls Picnic Water System
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Applewhite Campground
1 health-basedUsfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Usfs San Bernardino Nf
Santa Rosa Springs
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.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2023
How Does This Compare?
Rancho Cucamonga (92408) has more violations than 81% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 24.
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.