Grantsville WWTP
National Pike (Alternate Rt.40, Grantsville, MD 21536 · Garrett County · Publicly Owned Treatment Works
- Average flow
- 0.28 MGD
- Design flow
- 0.6 MGD
- NPDES permit
- MD0020761
- Effective
- Permit expires
- June 2031
- Population served
- 1,253
- CWNS 2022
Grantsville WWTP is a publicly owned wastewater treatment works in Grantsville, Garrett County, Maryland treating an average of 0.28 million gallons per day against a permitted design capacity of 0.6 MGD, serving about 1,253 residents. It discharges under NPDES permit MD0020761 (effective), which expires in June 2031, with 147 recorded violations in the last three years.
Treatment technology
Treatment structures and unit processes at Grantsville WWTP.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 147
- Effluent violations
- 147
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
1 verified contact for Grantsville WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Grantsville WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Maryland
Grantsville · 5 mi away
0.0016 MGD
Accident · 9 mi away
0.0039 MGD
Accident · 11 mi away
0.1 MGD
Friendsville · 14 mi away
0.09 MGD
Westernport · 14 mi away
1.03 MGD
Bloomington · 16 mi away
0.02 MGD
Rawlings · 18 mi away
0.07 MGD
Pinto · 18 mi away
0.21 MGD
Grantsville 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 September 23, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms