ZIP Code 92040
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.
10
PFAS Detected
1
Above EPA Limits
5
Water Systems
120%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 120% of limit
Detected: 4.80 ppt
Barona
090600119 Low LevelWater Type
Groundwater
PFAS Detected
2
Above MCL
0
State
09
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 56000.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.90ppt | No federal limit | — | Unregulated |
HELIX WATER DISTRICT
CA3710010 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 | 26000.00ppt | No federal limit | — | Unregulated |
LAKESIDE WD
CA3710013 High RiskWater Type
Groundwater
PFAS Detected
4
Above MCL
1
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 4.80ppt | 120% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 4.80ppt | 48% of limit
| 10 ppt | Below limit |
lithium | 31000.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.80ppt | No federal limit | — | Unregulated |
SAN DIEGO, CITY OF
CA3710020 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 | 65000.00ppt | No federal limit | — | Unregulated |
PADRE DAM MWD
CA3710037 Low LevelWater Type
Surface Water
PFAS Detected
2
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 47000.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 5.80ppt | No federal limit | — | Unregulated |
Note: ZIP code 92040 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.