ZIP Code 90660
High RiskPFAS above EPA limits detected
4 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.
20
PFAS Detected
4
Above EPA Limits
3
Water Systems
750%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 750% of limit
Detected: 30.00 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 400% of limit
Detected: 16.00 ppt
SAN GABRIEL VALLEY WATER CO.-EL MONTE
CA1910039 Low LevelWater Type
Groundwater
PFAS Detected
2
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFBA Perfluorobutanoic acid | 10.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 5.60ppt | No federal limit | — | Unregulated |
PICO RIVERA - CITY, WATER DEPT.
CA1910042 High RiskWater Type
Groundwater
PFAS Detected
9
Above MCL
2
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 30.00ppt | 750% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 16.00ppt | 400% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 5.60ppt | 56% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 17.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 15.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 14.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 10.00ppt | No federal limit | — | Unregulated |
PFDA Perfluorodecanoic acid | 5.60ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 4.10 ppt | No federal limit |
PICO WD
CA1910125 High RiskWater Type
Groundwater
PFAS Detected
9
Above MCL
2
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 28.00ppt | 700% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 14.00ppt | 350% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 5.70ppt | 57% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 21.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 17.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 10.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 7.30ppt | No federal limit | — | Unregulated |
PFDA Perfluorodecanoic acid | 5.10ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 4.00 ppt | No federal limit |
Note: ZIP code 90660 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.