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Elementary And Secondary Schools, Marbury, Maryland. NPDES permit MD0023175, in force until Dec 31, 2030. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 30 mg/L (alert, not enforceable) | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L (alert, not enforceable) | all year | 001 |
| Nitrogen, total [as N] | maximum monthly average | ≤ 10 mg/L (alert, not enforceable) | all year | 001 |
| Nitrogen, total [as N] | cumulative total | ≤ 213 lb/yr | all year | 001 |
| Nitrogen, nitrite total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, nitrate total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) (alert, not enforceable) | all year | 001 |
| Flow, in conduit or thru treatment plant | maximum monthly average | ≤ 3500 gal/d | all year | 001 |
| pH | annual average | report only (SU) | all year | MW01 |
| Nitrogen, total [as N] | annual average | report only (mg/L) | all year | MW01 |
| Nitrogen, nitrite total [as N] | annual average | report only (mg/L) | all year | MW01 |
| Nitrogen, nitrate total [as N] | annual average | report only (mg/L) | all year | MW01 |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year | MW01 |
| Phosphate, total [as PO4] | annual average | report only (mg/L) | all year | MW01 |
| Chloride [as Cl] | annual average | report only (mg/L) | all year | MW01 |
| Solids, total dissolved | annual average | report only (mg/L) | all year | MW01 |
| Coliform, fecal general | maximum | ≤ 2.2 MPN/100mL | all year | MW01 |
| pH | annual average | report only (SU) | all year | MW02 |
| Nitrogen, total [as N] | maximum annual average | ≤ 10 mg/L | all year | MW02 |
| Nitrogen, nitrite total [as N] | maximum annual average | ≤ 1 mg/L | all year | MW02 |
| Nitrogen, nitrate total [as N] | maximum annual average | ≤ 10 mg/L | all year | MW02 |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year | MW02 |
| Phosphate, total [as PO4] | annual average | report only (mg/L) | all year | MW02 |
| Chloride [as Cl] | maximum annual average | ≤ 250 mg/L | all year | MW02 |
| Solids, total dissolved | maximum annual average | ≤ 500 mg/L | all year | MW02 |
| Coliform, fecal general | maximum | ≤ 2.2 MPN/100mL | all year | MW02 |
| pH | annual average | report only (SU) | all year | MW03 |
| Nitrogen, total [as N] | maximum annual average | ≤ 10 mg/L | all year | MW03 |
| Nitrogen, nitrite total [as N] | maximum annual average | ≤ 1 mg/L | all year | MW03 |
| Nitrogen, nitrate total [as N] | maximum annual average | ≤ 10 mg/L | all year | MW03 |
| Nitrogen, Kjeldahl, total [as N] | annual average | report only (mg/L) | all year | MW03 |
| Phosphate, total [as PO4] | annual average | report only (mg/L) | all year | MW03 |
| Chloride [as Cl] | maximum annual average | ≤ 250 mg/L | all year | MW03 |
| Solids, total dissolved | maximum annual average | ≤ 500 mg/L | all year | MW03 |
| Coliform, fecal general | maximum | ≤ 2.2 MPN/100mL | all year | MW03 |
Cited limits by parameter: Maryland's rules and the federal ones.
Same industry: the 20 Educational Services permits in Maryland.
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