Glen Arm Wastewater Treatment Plant (formerly Grumman Wwtp)
12200 Long Green Pike, Glen Arm, MD 21057 · Baltimore County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.0004 MGD
- NPDES permit
- MD0067903
- Expired
- Permit expires
- January 2026
- Population served
- —
- CWNS 2022
Glen Arm Wastewater Treatment Plant (formerly Grumman Wwtp) is a publicly owned wastewater treatment works in Glen Arm, Baltimore County, Maryland. It discharges under NPDES permit MD0067903 (expired), which expires in January 2026, with 22 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Glen Arm Wastewater Treatment Plant (formerly Grumman Wwtp).
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 22
- Effluent violations
- 22
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Glen Arm Wastewater Treatment Plant (formerly Grumman Wwtp).
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 Maryland
Perry Hall · 4 mi away
0.02 MGD
Baltimore · 11 mi away
107.68 MGD
Jarrettsville · 13 mi away
0.0066 MGD
Perryman · 15 mi away
9.48 MGD
Baltimore · 16 mi away
51.59 MGD
Hampstead · 21 mi away
0.49 MGD
Chestertown · 21 mi away
0.05 MGD
Port Deposit · 23 mi away
0.09 MGD
Glen Arm Wastewater Treatment Plant (formerly Grumman Wwtp): 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 October 26, 2026; facility record last updated July 18, 2023.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms