ZIP Code 91001
High RiskPFAS above EPA limits detected
3 compounds 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
3
Above EPA Limits
3
Water Systems
475%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 475% of limit
Detected: 19.00 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 213% of limit
Detected: 8.50 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 110% of limit
Detected: 11.00 ppt
LAS FLORES WATER CO.
CA1910061 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 | 53600.00ppt | No federal limit | — | Unregulated |
PASADENA-CITY, WATER DEPT.
CA1910124 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 | 64200.00ppt | No federal limit | — | Unregulated |
RUBIO CANON LAND & WATER ASSOCIATION
CA1910140 High RiskWater Type
Groundwater
PFAS Detected
7
Above MCL
3
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 19.00ppt | 475% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 8.50ppt | 213% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 11.00ppt | 110% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFBA Perfluorobutanoic acid | 5.70ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 3.50ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.50ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 3.10ppt | No federal limit | — | Unregulated |
Note: ZIP code 91001 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.