MARATHON PETROLEUM COMPANY LLC
PWS ID: LA2095008 · GARYVILLE, Louisiana 70051
Population Served
817
Total Violations
73
Health-Based Violations
51
Water Source
Surface Water
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- St. John the Baptist Parish
- School/Daycare
- No
- MCL Violations
- 41
- Monitoring Violations
- 15
- Treatment Tech Violations
- 10
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| TTHM | MCL | 38 | 2024 |
| Surface Water Treatment Rule | TT | 10 | 2007 |
| Coliform (TCR) | MR | 7 | 2014 |
| Revised Total Coliform Rule | MON | 4 | 2024 |
| Chlorine | MR | 4 | 2024 |
| Coliform (TCR) | MCL | 3 | 1994 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.