Wssc Damascus WRRF
Gaithersburg, MD · Montgomery County · Publicly Owned Treatment Works
- Average flow
- 0.72 MGD
- Design flow
- 1.5 MGD
- NPDES permit
- MD0020982
- Effective
- Permit expires
- December 2028
- Population served
- 5,246
- CWNS 2022
Wssc Damascus WRRF is a publicly owned wastewater treatment plant in Gaithersburg, Montgomery County, Maryland treating an average of 0.72 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 5,246 residents. Treatment on site includes clarifiers. It discharges under NPDES permit MD0020982 (effective), which expires in December 2028, with 3 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 3
- 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 Wssc Damascus WRRF.
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Mount Airy · 8 mi away
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Mount Airy · 8 mi away
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Mount Airy · 9 mi away
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Poolesville · 12 mi away
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Frederick · 14 mi away
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Frederick · 15 mi away
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Sykesville · 16 mi away
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Wssc Damascus WRRF: 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 May 19, 2025.