Back River Wastewater Treatment Plant
Baltimore, MD · Baltimore City County · Publicly Owned Treatment Works
- Average flow
- 114.1 MGD
- Design flow
- —
- NPDES permit
- MDL021555
- Effective
- Permit expires
- December 2030
- Population served
- 432,114
- CWNS 2022
Back River Wastewater Treatment Plant is a publicly owned wastewater treatment works in Baltimore, Baltimore City County, Maryland treating an average of 114.1 million gallons per day, serving about 432,114 residents. Treatment on site includes clarifiers, uncovered lagoons, biogas silos, biogas balloons. It discharges under NPDES permit MDL021555 (effective), which expires in December 2030, with 32 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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Uncovered lagoons
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Biogas silos
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Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 32
- Effluent violations
- 10
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in Baltimore
Baltimore's capital improvement plan lists 212 water, sewer and wastewater line items worth $4.7B starting 2025–2031. The largest budgeted items are shown here.
All water and sewer capital projects in Baltimore →
| Project | Budget | Years |
|---|---|---|
| Future Water Main Replacement | $280,000,000 | 2027–2031 |
| Baltimore St./Smallwood St./Reisterstown Rd. Area Water Main Replacements | $199,868,000 | 2026–2030 |
| OF Hyd Outfall Phase II Sewershed Improvements for 5 Year Storm LOP | $155,083,680 | 2027–2029 |
| (Project 1355) Activated Plant 3 Rehab at BRWWTP | $122,148,822 | 2027–2027 |
| Construction Reserve Meter Replacement | $110,000,000 | 2026–2031 |
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
9 verified contacts for Back River Wastewater Treatment Plant, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Back River Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Maryland
Baltimore · 6 mi away
49.01 MGD
Perry Hall · 9 mi away
0.05 MGD
Glen Arm · 11 mi away
—
Chestertown · 16 mi away
0.06 MGD
Rock Hall · 17 mi away
0.22 MGD
Perryman · 17 mi away
10.81 MGD
Annapolis · 19 mi away
3.68 MGD
Odenton · 20 mi away
0.52 MGD
Back River Wastewater Treatment Plant: 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 February 27, 2025.