ZIP Code 91011
High RiskPFAS above EPA limits detected
1 compound exceed EPA Maximum Contaminant Levels in water serving this ZIP code. Standard pitcher filters like Brita do not remove PFAS. See filter recommendations below.
9
PFAS Detected
1
Above EPA Limits
3
Water Systems
128%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 128% of limit
Detected: 5.10 ppt
CRESCENTA VALLEY CWD
CA1910028 High RiskWater Type
Groundwater
PFAS Detected
7
Above MCL
1
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 5.10ppt | 128% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 4.90ppt | 49% of limit
| 10 ppt | Below limit |
lithium | 45000.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 8.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 8.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 6.80ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 3.10ppt | No federal limit | — | Unregulated |
LA CANADA IRRIGATION DIST.
CA1910054 Low LevelWater Type
Surface Water
PFAS Detected
1
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 53000.00ppt | No federal limit | — | Unregulated |
VALLEY WATER CO.
CA1910166 Low LevelWater Type
MX
PFAS Detected
1
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 65700.00ppt | No federal limit | — | Unregulated |
Note: ZIP code 91011 is served by 3 separate water utilities.
Results above show data for each system independently.
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.