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EPA WATER QUALITY DATA · CA
Is San Diego County Tap Water Safe in 2026?
Population-weighted grade and city-level UCMR5 risk bands for 2 WaterCheckup cities in San Diego County. "At Risk" means at least one analyte above an EPA limit or a regulated PFAS violation for that system. "Safe" means no such flag and a low-concern city profile.
COUNTY GRADE
F
Score 28
2
Total cities
0
At Risk
0
Safe
1.7M
Population served
CITIES IN SAN DIEGO COUNTY
| CITY | GRADE | CONTAMINANTS ABOVE LIMIT | POPULATION |
|---|---|---|---|
| San Diego | FMONITOR | — | 1.4M |
| Chula Vista | FMONITOR | — | 270K |
FILTER RECOMMENDATIONS
Typical picks for households in San Diego County when UCMR5 shows PFAS or related analytes — same product lines we feature on city pages.
TOP PICKS FOR SAN DIEGO COUNTY
⚠ Contaminants detected in county water systems
#1
Waterdrop G3P800 RO
EDITORS PICKWaterdrop · ~$849
Tankless 800 GPD, removes 99%+ PFAS & lead, 10-stage filtration. Smart faucet TDS display.
WHY THIS FOR SAN DIEGO COUNTY · Chosen for San Diego County because several cities are in a medium- or high-concern profile even without an EPA-limit flag in UCMR — RO still provides the broadest contaminant coverage for household drinking water.
#2
Aquasana SmartFlow RO
MOST CERTIFIEDAquasana · ~$449
WQA Gold Seal + NSF 42/53/58/401. Most certifications of any under-sink RO. Removes 90+ contaminants.
#3
AquaTru Under-Sink RO
EASIEST FILTER CHANGEAquaTru · ~$375
NSF 42/53/58 certified. Quick-change filters, no tools. Compact tankless design, 4-stage filtration.
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