Water Quality in Rancho Cucamonga, CA (92311)
EPA violation data for public water systems serving ZIP code 92311.
Active Health Violations
6 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 70% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
33,954
Population
31
Water Systems
12
Violations (5yr)
6
Health-Based
Location
Loading map...
Water Systems Serving This Area (31)
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
Usmc Nebo (Barstow)
All resolvedHinkley Elementary School
Usmc Yermo Annex
All resolvedNps - Kelso Depot
Hacienda Mhp
Hi Desert Mwc
5 health-basedNps - Hole In The Wall Campground
Steve Speisser Apts (Dunes)
Mansfield Inn Motel
Shady Lane Rv Camp
1 health-basedNps - Mid Hills
Nps - Zzyzx Desert Studies Center
Noisy Nag
Michael B Mezger Mwc
Del Taco #201
Yellow Freight System Inc
Rowland Water System
Harvey House Restaurant
Skyline Drive In Theatre
Sun & Sky Golf Course (Sun Vly Cc)
Desert Inn Tavern
Contaminants Found
A naturally occurring element that can cause cancer and other health effects at high levels.
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.
Missed testing deadlines — not a detection of bacteria.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2023
How Does This Compare?
Rancho Cucamonga (92311) has more violations than 70% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 12.
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.