Tap Water Quality in Altadena, California (ZIP 91001)
Serving Altadena, California
Is the Tap Water Safe in Altadena, California?
Tap water in Altadena, California (ZIP 91001) has 7 contaminants above EPA health-based guidelines (MCLGs) in at least one of the 1 city served. We recommend reviewing detailed city reports below and considering a certified water filter for additional protection.
ZIP 91001 is served by 5 water utilities providing water to Altadena. Water quality varies by utility and city. Click on the cities below to see detailed reports for your specific area.
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Water Quality Report for ZIP 91001
3 contaminants above EPA health guidelines
These levels represent the worst case across all cities in this ZIP code. Check individual city reports for specific details.
Found in Altadena
Found in Altadena
Found in Altadena
Water Utilities Serving ZIP 91001
FOOTHILL MUNICIPAL WATER DIST.
0
Water Source:
Surface water purchased
Contaminants Tested:
14
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Best Water Filters for Altadena (ZIP 91001)
Based on the contaminants found in your area, we recommend NSF-certified water filters that can remove the specific contaminants above health guidelines.
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Browse third-party-certified filters by the contaminant you care about — each list shows exactly which NSF/ANSI standard backs the claim, no marketing spin.
Browse filters by contaminantFrequently Asked Questions about Altadena Tap Water
Is the tap water safe in Altadena, California (ZIP 91001)?
Which water utilities serve ZIP code 91001?
How do I pay my water bill in Altadena (ZIP 91001)?
What contaminants are in Altadena water (ZIP 91001)?
Should I use a water filter in Altadena (ZIP 91001)?
What cities are in ZIP code 91001?
How we built this page
Water-quality data on this page comes from public federal and state records for the 5 utilityies serving ZIP 91001. We refresh each utility's record whenever its underlying source publishes new data.
- Contaminants & violations: EPA Safe Drinking Water Information System (SDWIS) plus the Unregulated Contaminant Monitoring Rule (UCMR-5) for PFAS and emerging contaminants.
- Annual reports: the most recent published Consumer Confidence Report (CCR) from each utility serving this ZIP, where available.
- Service area & contact: EPA SDWIS plus the California Department of Environmental Protection / Drinking Water program.
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