ZIP Code 95963
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.
8
PFAS Detected
3
Above EPA Limits
2
Water Systems
563%
Highest % of MCL
Compounds Exceeding EPA Limits
PFOS Exceeds EPA limit
0 ppt MCL: 4 ppt 563% of limit
Detected: 22.50 ppt
PFHxS Exceeds EPA limit
0 ppt MCL: 10 ppt 221% of limit
Detected: 22.10 ppt
PFOA Exceeds EPA limit
0 ppt MCL: 4 ppt 170% of limit
Detected: 6.80 ppt
CAL-WATER SERVICE CO.-CHICO
CA0410002 High RiskWater Type
Groundwater
PFAS Detected
7
Above MCL
3
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
PFOS Perfluorooctane sulfonic acid | 22.50ppt | 563% of limit
| 4 ppt | ⚠ Exceeds MCL |
PFHxS Perfluorohexane sulfonic acid | 22.10ppt | 221% of limit
| 10 ppt | ⚠ Exceeds MCL |
PFOA Perfluorooctanoic acid | 6.80ppt | 170% of limit
| 4 ppt | ⚠ Exceeds MCL |
lithium | 11700.00ppt | No federal limit | — | Unregulated |
PFBS Perfluorobutane sulfonic acid | 9.60ppt | No federal limit | — | Unregulated |
PFHxA Perfluorohexanoic acid | 6.00ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 5.30ppt | No federal limit | — | Unregulated |
CITY OF ORLAND
CA1110001 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 11200.00ppt | No federal limit | — | Unregulated |
Note: ZIP code 95963 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.