ZIP Code 92376
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.
12
PFAS Detected
1
Above EPA Limits
2
Water Systems
183%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 183% of limit
Detected: 7.30 ppt
RIALTO, CITY OF
CA3610038 High RiskWater Type
Groundwater
PFAS Detected
7
Above MCL
1
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOA Perfluorooctanoic acid | 7.30ppt | 183% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 3.50ppt | 35% of limit
| 10 ppt | Below limit |
PFPeA Perfluoropentanoic acid | 18.00ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 17.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 5.70ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.60ppt | No federal limit | — | Unregulated |
PFHpA Perfluoroheptanoic acid | 3.50ppt | No federal limit | — | Unregulated |
SAN BERNARDINO CITY
CA3610039 ModerateWater Type
Groundwater
PFAS Detected
5
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFHxS Perfluorohexane sulfonic acid | 4.00ppt | 40% of limit
| 10 ppt | Below limit |
lithium | 9110.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 4.40ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 4.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.40ppt | No federal limit | — | Unregulated |
Note: ZIP code 92376 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.