Poolesville WWTP
18901 Fisher Ave, Poolesville, MD 20837 · Montgomery County · Publicly Owned Treatment Works
- Average flow
- 0.43 MGD
- Design flow
- 0.75 MGD
- NPDES permit
- MD0023001
- Effective
- Permit expires
- November 2027
- Population served
- 5,500
- CWNS 2022
Poolesville WWTP is a publicly owned wastewater treatment works in Poolesville, Montgomery County, Maryland treating an average of 0.43 million gallons per day against a permitted design capacity of 0.75 MGD, serving about 5,500 residents. It discharges under NPDES permit MD0023001 (effective), which expires in November 2027, with 6 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Poolesville WWTP.
Available with a free Klarifi account
See the full treatment train at Poolesville WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 6
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Poolesville
Poolesville's capital improvement plan lists 19 water, sewer and wastewater line items worth $2M starting 2025–2027. The largest budgeted items are shown here.
All water and sewer capital projects in Poolesville →
| Project | Budget | Years |
|---|---|---|
| PFAS Remediation | $500,000 | 2025–2029 |
| Equip Replace/Major Rebuild | $200,000 | 2025–2029 |
| Basin Recoating | $180,000 | 2025–2027 |
| Alpha Media | $175,000 | 2025–2029 |
| Unidentified W&S Equipment | $150,000 | 2025–2029 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
4 verified contacts for Poolesville WWTP, with validated emails and direct phone numbers.
Unlock 4 verified contacts (1 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Poolesville WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Maryland
Point Of Rocks · 12 mi away
0.07 MGD
Gaithersburg · 12 mi away
0.76 MGD
Ijamsville · 13 mi away
0.06 MGD
Frederick · 15 mi away
7.11 MGD
Brunswick · 17 mi away
—
Jefferson · 18 mi away
0.13 MGD
Mount Airy · 19 mi away
0.06 MGD
Frederick · 20 mi away
5.68 MGD
Poolesville 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 27, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biosolids · Filter press · all terms