Water Quality in Los Angeles, CA (91791)
EPA violation data for public water systems serving ZIP code 91791.
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 92% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
33,028
Population
14
Water Systems
59
Violations (5yr)
6
Health-Based
Location
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Water Systems Serving This Area (14)
Griffith Park
Los Angeles-City, Dept. Of Water & Power
Long Beach Utilities Department
Valencia Heights Water Co.
Arbor Village
3 health-basedMecks Whispering Pines Ii Llc
Sherwood Forest Mhp Pws
2 health-basedGun River Mobile Estates
Brady Hills Ml
All resolvedArrowhead Lake Mhp
Recreacres Mhc Llc
All resolvedSwanton Meadows
1 health-basedGun River Estates West
Covina Irrigating Co.
Contaminants Found
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.
Similar to nitrate — harmful to infants at high levels.
At high levels, nitrate can cause blue baby syndrome in infants.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
Los Angeles (91791) has more violations than 92% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 59.
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
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 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.