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Sewage treatment plant, major discharger, Savage, Maryland. NPDES permit MD0055174, in force until May 31, 2031. Last 12 months: no values over a limit, 22 required values missing, 2 of 34 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 5 mg/L | Apr–Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 26 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 7.5 mg/L | Apr–Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 39 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 1200 lb/d | Apr–Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 6300 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 1800 lb/d | Apr–Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 9400 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Solids, total suspended | maximum monthly average | ≤ 26 mg/L | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 39 mg/L | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 6300 lb/d | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 9400 lb/d | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | annual maximum | report only (lb/yr) | all year | 001 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 001 |
| Nitrogen, total [as N] | annual total | report only (lb/yr) | all year | 001 |
| Nitrogen, total [as N] | annual total | report only (lb/yr) | all year | 001 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, organic total [as N] | monthly average | report only (lb/d) | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.66 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 3.53 mg/L | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 2.5 mg/L | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 401 lb/d | Apr–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 854 lb/d | Jan, Feb, Mar, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum weekly average | ≤ 602 lb/d | Apr–Oct | 001 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | monthly average | report only (mg/L) | all year | 001 |
| Phosphorus, total [as P] | annual maximum | report only (lb/yr) | all year | 001 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 001 |
| Phosphorus, total [as P] | annual total | report only (lb/yr) | all year | 001 |
| Phosphorus, total [as P] | annual total | report only (lb/yr) | all year | 001 |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 001 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 001 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 001 |
| Flow, total | annual total | report only (Mgal/yr) | all year | 001 |
| Flow, total | annual total | report only (Mgal/yr) | all year | 001 |
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year | 101 |
| Oxygen, dissolved [DO] | daily average minimum | ≥ 6 mg/L | all year | 101 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 101 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 101 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 101 |
| pH | minimum | ≥ 6.5 SU | all year | 101 |
| pH | maximum | ≤ 8.5 SU | all year | 101 |
| Solids, total suspended | annual maximum | ≤ 2284170 lb/yr | all year | 101 |
| Solids, total suspended | monthly total | report only (lb/mo) | all year | 101 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 101 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 101 |
| Nitrogen, total [as N] | annual maximum | ≤ 309715 lb/yr | all year | 101 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 101 |
| Nitrogen, total [as N] | cumulative total | report only (lb/yr) | all year | 101 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 101 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 101 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 101 |
| Nitrite + Nitrate total [as N] | monthly average | report only (mg/L) | all year | 101 |
| Phosphorus, total [as P] | cumulative total | ≤ 23358 lb/yr | all year | 101 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 101 |
| Cyanide, free [amenable to chlorination] | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | all year | 101 |
| Benzo[b]fluoranthene | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Benzo[a]pyrene | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Chrysene | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Indeno[1,2,3-cd]pyrene | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| N-Nitrosodi-N-propylamine | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| N-Nitrosodimethylamine [NDMA] | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Benzo[a]anthracene | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Dibenz[a,h]anthracene | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| 2,3,7,8-Tetrachlorodibenzo-p-dioxin | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Benzidine | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Aldrin | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Dieldrin | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Toxaphene | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Heptachlor | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Hexachlorobenzene | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 101 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 101 |
| Chlorine, total residual | maximum | ≤ .1 mg/L | all year | 101 |
| E. coli | maximum monthly geometric mean | ≤ 126 MPN/100mL | all year | 101 |
| 1,2,4,5-Tetrachlorobenzene | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 101 |
| Polychlorinated biphenyls [PCB] pg/L | annual maximum | report only (g/yr) | all year | 101 |
| BOD, 5-day, percent removal | monthly average minimum | ≥ 85 % | all year | 101 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 101 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 101 |
| Solids, total suspended | monthly total | report only (lb/mo) | all year | 102 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 102 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 102 |
| Flow, in conduit or thru treatment plant | monthly average | report only (MGD) | all year | 102 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (MGD) | all year | 102 |
| Chlorine, total residual | monthly average | report only (mg/L) | all year | 102 |
| Solids, suspended percent removal | monthly average minimum | ≥ 85 % | all year | 102 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 102 |
| Solids, total suspended | cumulative total | report only (lb/yr) | all year | TRAD |
| Solids, total suspended | cumulative total | report only (lb/yr) | all year | TRAD |
| Solids, total suspended | cumulative total | report only (lb/yr) | all year | TRAD |
| Solids, total suspended | cumulative total | report only (lb/yr) | all year | TRAD |
| Nitrogen, total [as N] | cumulative total | report only (lb/mo) | all year | TRAD |
| Nitrogen, total [as N] | cumulative total | report only (lb/mo) | all year | TRAD |
| Nitrogen, total [as N] | cumulative total | report only (lb/mo) | all year | TRAD |
| Nitrogen, total [as N] | cumulative total | report only (lb/mo) | all year | TRAD |
| Phosphorus, total [as P] | cumulative total | report only (lb/yr) | all year | TRAD |
| Phosphorus, total [as P] | cumulative total | report only (lb/yr) | all year | TRAD |
| Phosphorus, total [as P] | cumulative total | report only (lb/mo) | all year | TRAD |
| Phosphorus, total [as P] | cumulative total | report only (lb/mo) | all year | TRAD |
| Flow, total | year-to-date total | report only (Mgal/yr) | all year | TRAD |
| Flow, total | year-to-date total | report only (Mgal/yr) | all year | TRAD |
Cited limits by parameter: Maryland's rules and the federal ones.
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