Water Quality in San Luis Obispo, CA (93453)
EPA violation data for public water systems serving ZIP code 93453.
No Health-Based Violations
None of the 8 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There is1 monitoring/reporting violation (missed testing deadlines), all resolved.
Better than 29% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
2,344
Population
8
Water Systems
1
Violations (5yr)
0
Health-Based
Location
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Water Systems Serving This Area (8)
Santa Margarita Recreation Area
San Luis Obispo Water Department
City Of Paso Robles Water Division
Atascadero Mutual Water Co
Santa Margarita Koa
All resolvedRedwind Foundation - Inactive
Outlaw Ranch Water Supply - Inactive
California Valley Water System - Inactiv
Contaminants Found
At high levels, nitrate can cause blue baby syndrome in infants.
Lead & Copper Levels
Lead (Pb)
Within limitSampled: Jan 2025
How Does This Compare?
San Luis Obispo (93453) has more violations than 29% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 1, 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.