ZIP Code 90670
High RiskPFAS above EPA limits detected
7 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.
28
PFAS Detected
7
Above EPA Limits
5
Water Systems
1475%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 400% of limit
Detected: 16.00 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 175% of limit
Detected: 7.00 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 110% of limit
Detected: 11.00 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 |
SUBURBAN WATER SYSTEMS-LA MIRADA
CA1910059 High RiskWater Type
Groundwater
PFAS Detected
7
Above MCL
2
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 16.00ppt | 400% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 7.00ppt | 175% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.80ppt | 38% of limit
| 10 ppt | Below limit |
lithium | 17000.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 9.50ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.20ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.50ppt | No federal limit | — | Unregulated |
GSWC - NORWALK
CA1910098 Low LevelWater Type
Groundwater
PFAS Detected
4
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 58000.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 15.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 13.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 7.30ppt | No federal limit | — | Unregulated |
LIBERTY UTILITIES - BELLFLOWER-NORWALK
CA1910211 High RiskWater Type
Groundwater
PFAS Detected
9
Above MCL
3
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 59.00ppt | 1475% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 16.00ppt | 400% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 11.00ppt | 110% of limit
| 10 ppt | ⚠ Exceeds MCL |
lithium | 88600.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 17.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 10.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 8.90ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 8.70ppt | No federal limit | — | Unregulated |
Show 1 more compound detected at low levels
| PFHpAPerfluoroheptanoic acid | 3.90 ppt | No federal limit |
SANTA FE SPRINGS - CITY, WATER DEPT.
CA1910245 High RiskWater Type
Groundwater
PFAS Detected
6
Above MCL
2
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 14.00ppt | 350% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 6.90ppt | 173% of limit
| 4 ppt | ⚠ Exceeds MCL |
lithium | 45000.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 14.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 5.20ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.90ppt | No federal limit | — | Unregulated |
Note: ZIP code 90670 is served by 5 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.