ZIP Code 95422
Low Level5
PFAS Detected
0
Above EPA Limits
3
Water Systems
N/A
Highest % of MCL
GOLDEN STATE WATER CO.-CLEARLAKE SYSTEM
CA1710002 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 | 27500.00ppt | No federal limit | — | Unregulated |
HIGHLANDS MUTUAL WATER COMPANY
CA1710003 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 | 25000.00ppt | No federal limit | — | Unregulated |
KONOCTI COUNTY WATER DISTRICT
CA1710006 Low LevelWater Type
Surface Water
PFAS Detected
3
Above MCL
0
State
California
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 24000.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 8.20ppt | No federal limit | — | Unregulated |
PFPeA Perfluoropentanoic acid | 3.90ppt | No federal limit | — | Unregulated |
Note: ZIP code 95422 is served by 3 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.