ZIP Code 94129
Moderate7
PFAS Detected
0
Above EPA Limits
1
Water System
100%
Highest % of MCL
PRESIDIO OF SAN FRANCISCO
CA3810700 ModerateWater Type
Surface Water
PFAS Detected
7
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 4.00ppt | 100% of limit
| 4 ppt | Below limit |
PFHxS Perfluorohexane sulfonic acid | 4.60ppt | 46% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 8.90ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 6.80ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 6.20ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.90ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 3.10ppt | No federal limit | — | Unregulated |
Data source: EPA Unregulated Contaminant Monitoring Rule, 5th cycle (UCMR 5) — January 2026 release.
UCMR 5 tested ~10,000 public water systems serving more than 25 people between 2023-2025 for 29 PFAS compounds.
Detection values represent the highest single-sample result measured at entry points to the distribution system.