Old Monroe Sand & Gravel
Old Monroe, MO · Lincoln County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- —
- NPDES permit
- MO0114359
- Administratively continued
- Permit expires
- September 2023
- Population served
- 724
- CWNS 2022
Old Monroe Sand & Gravel is a publicly owned wastewater treatment plant in Old Monroe, Lincoln County, Missouri, serving about 724 residents. Treatment on site includes uncovered lagoons, lagoon, facultative. It discharges under NPDES permit MO0114359 (administratively continued), which expires in September 2023, with 0 recorded violations in the last three years. Planned upgrades on record: disinfection, uv.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Uncovered lagoons
Unlock
Lagoon, Facultative
unit processDisinfection, UV
planned upgradeUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Old Monroe Sand & Gravel.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in Missouri
Old Monroe · 2 mi away
0.05 MGD
O'Fallon · 4 mi away
0.1 MGD
Winfield · 4 mi away
0.58 MGD
O'Fallon · 7 mi away
6.7 MGD
Moscow Mills · 7 mi away
0.002 MGD
Winfield · 8 mi away
0.36 MGD
Wentzville · 9 mi away
4.34 MGD
Moscow Mills · 10 mi away
0.25 MGD
Old Monroe Sand & Gravel: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated November 8, 2025.