Westminster WWTP
1161 Old New Windsor Pike, Westminster, MD 21158 · Carroll County · Publicly Owned Treatment Works
- Average flow
- 3.6 MGD
- Design flow
- 5 MGD
- NPDES permit
- MD0021831
- Effective
- Permit expires
- July 2031
- Population served
- 38,000
- CWNS 2022
Westminster WWTP is a publicly owned wastewater treatment works in Westminster, Carroll County, Maryland treating an average of 3.6 million gallons per day against a permitted design capacity of 5 MGD, serving about 38,000 residents. It discharges under NPDES permit MD0021831 (effective), which expires in July 2031, with 9 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Westminster WWTP.
Available with a free Klarifi account
See the full treatment train at Westminster WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 9
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Westminster
Westminster's capital improvement plan lists 11 water, sewer and wastewater line items worth $14M starting 2025–2026. The largest budgeted items are shown here.
All water and sewer capital projects in Westminster →
| Project | Budget | Years |
|---|---|---|
| WWTP Plant Expansion | $8,500,000 | 2025–2025 |
| Inflow and Infiltration (I&I) | $2,200,000 | 2025–2027 |
| Taste and Odor Treatment (GAC) | $1,000,000 | 2025–2026 |
| New Water Supply Source Development | $750,000 | 2025–2027 |
| Vehicle& Equipment Replacement | $485,000 | 2025–2026 |
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
1 verified contact for Westminster WWTP, with validated emails and direct phone numbers.
Unlock 1 verified contact
Names, validated emails and direct phone numbers for decision-makers at Westminster WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Maryland
New Windsor · 4 mi away
0.08 MGD
Westminster · 6 mi away
0.0016 MGD
Union Bridge · 8 mi away
0.14 MGD
Manchester · 11 mi away
0.42 MGD
Taneytown · 11 mi away
0.75 MGD
Hampstead · 11 mi away
0.49 MGD
Mount Airy · 14 mi away
0.63 MGD
Sykesville · 14 mi away
1.97 MGD
Westminster 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 May 19, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Filter press · FOG · all terms