Water Quality in Los Angeles, CA (91770)
EPA violation data for public water systems serving ZIP code 91770.
Active Health Violations
1 health-based violation 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.
58,382
Population
22
Water Systems
12
Violations (5yr)
1
Health-Based
Location
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Water Systems Serving This Area (22)
Griffith Park
Los Angeles-City, Dept. Of Water & Power
Long Beach Utilities Department
Cal/Am Water Company - San Marino
San Gabriel County Wd
Cal-Am Water Company - Duarte
Cal/Am Water Company - Baldwin Hills
Cal-Am Water Company - East Pasadena
Bellflower Municipal Water System
Amarillo Mutual Water Company
All resolvedCal American Wc - Las Posas Estates
Cal American Water Company - Piru
All resolvedCal American Wc - Rio Plaza
Adams Ranch Mutual
Golden Sands Mobile Home Park
1 health-basedSce/Camp Edison-Shaver
Sce/Big Creek Powerhouse 1
Sce Bishop Creek Plant 5
Sce Bishop Creek Plant 4
Big Creek P H No 2
Big Creek P H No 8
Southern Calif Edison Company
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)
Exceeds limitSampled: Jan 2025
Copper (Cu)
Exceeds limitSampled: Jan 2025
How Does This Compare?
Los Angeles (91770) 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.