ZIP Code 92313
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.
14
PFAS Detected
3
Above EPA Limits
2
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 450% of limit
Detected: 18.00 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 140% of limit
Detected: 14.00 ppt
RIVERSIDE, CITY OF
CA3310031 Low LevelWater Type
GU
PFAS Detected
4
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 4.00ppt | 100% of limit
| 4 ppt | Below limit |
lithium | 9100.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 6.70ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.10ppt | No federal limit | — | Unregulated |
RIVERSIDE HIGHLAND WATER COMPANY
CA3610057 High RiskWater Type
Groundwater
PFAS Detected
10
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 | 18.00ppt | 450% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 14.00ppt | 140% of limit
| 10 ppt | ⚠ Exceeds MCL |
lithium | 11000.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 17.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 14.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 13.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 10.00ppt | No federal limit | — | Unregulated |
Show 2 more compounds detected at low levels
| PFHpAPerfluoroheptanoic acid | 8.20 ppt | No federal limit |
| PFPeS | 4.00 ppt | No federal limit |
Note: ZIP code 92313 is served by 2 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.