ZIP Code 63028
Low Level6
PFAS Detected
0
Above EPA Limits
4
Water Systems
N/A
Highest % of MCL
FESTUS PWS
MO6010276 Low LevelWater Type
GU
PFAS Detected
2
Above MCL
0
State
Missouri
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 19100.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 9.20ppt | No federal limit | — | Unregulated |
HERCULANEUM PWS
MO6010359 Low LevelWater Type
Groundwater
PFAS Detected
2
Above MCL
0
State
Missouri
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 22000.00ppt | No federal limit | — | Unregulated |
PFBA Perfluorobutanoic acid | 9.10ppt | No federal limit | — | Unregulated |
JEFFERSON COUNTY PWSD 5
MO6024296 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Missouri
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 27000.00ppt | No federal limit | — | Unregulated |
JEFFERSON COUNTY PWSD 7
MO6024299 Low LevelWater Type
Groundwater
PFAS Detected
1
Above MCL
0
State
Missouri
Data Period
2023–2025
PFAS Test Results
| Compound | Detected | vs. EPA Limit | EPA Limit | Status |
|---|---|---|---|---|
lithium | 10000.00ppt | No federal limit | — | Unregulated |
Note: ZIP code 63028 is served by 4 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.