Hampstead WWTP
Hampstead, MD · Carroll County · Publicly Owned Treatment Works
- Average flow
- 0.48 MGD
- Design flow
- 0.9 MGD
- NPDES permit
- MD0022446
- Effective
- Permit expires
- August 2030
- Population served
- 4,207
- CWNS 2022
Hampstead WWTP is a publicly owned wastewater treatment works in Hampstead, Carroll County, Maryland treating an average of 0.48 million gallons per day against a permitted design capacity of 0.9 MGD, serving about 4,207 residents. Treatment on site includes aerated lagoons, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit MD0022446 (effective), which expires in August 2030, with 25 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Aerated lagoons
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Uncovered lagoons
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Carrousels / oxidation ditches
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Compliance snapshot (last 3 years)
- Total violations
- 25
- Effluent violations
- 25
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Hampstead WWTP.
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Nearby wastewater treatment plants in Maryland
Manchester · 5 mi away
0.43 MGD
Westminster · 11 mi away
3.41 MGD
Westminster · 15 mi away
0.002 MGD
New Windsor · 15 mi away
0.09 MGD
Sykesville · 17 mi away
1.97 MGD
Union Bridge · 19 mi away
0.12 MGD
Jarrettsville · 20 mi away
0.006 MGD
Taneytown · 20 mi away
0.51 MGD
Hampstead 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 September 11, 2026; facility record last updated November 7, 2025.