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Sewage treatment plant, Woodsbord, Maryland. NPDES permit MD0058661, in force until May 31, 2029. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 6 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 10 mg/L | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 15 mg/L | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | monthly load | ≤ 21 lb/d | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | monthly load | ≤ 63 lb/d | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | weekly maximum | ≤ 31 lb/d | Jun–Sep | 001 |
| BOD, 5-day, 20 deg. C | weekly maximum | ≤ 94 lb/d | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | monthly load | ≤ 63 lb/d | all year | 001 |
| Solids, total suspended | annual maximum | report only (lb/yr) | all year | 001 |
| Solids, total suspended | weekly maximum | ≤ 94 lb/d | all year | 001 |
| Solids, total suspended | monthly load | report only (lb/mo) | 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, organic total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ .5 mg/L | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly average | ≤ 4 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ .75 mg/L | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | weekly average | ≤ 6 mg/L | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | monthly load | ≤ 1 lb/d | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | monthly load | ≤ 8 lb/d | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 1.6 lb/d | Jun–Sep | 001 |
| Nitrogen, ammonia total [as N] | weekly maximum | ≤ 13 lb/d | Jan, Feb, Mar, Oct, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | all year | 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 |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | all year | 001 |
| Flow, in conduit or thru treatment plant | average | report only (MGD) | all year | 001 |
| Flow, in conduit or thru treatment plant | cumulative total | report only (Mgal/yr) | Dec | 001 |
| Chlorine, total residual | maximum | < .1 mg/L | all year | 001 |
| E. coli | maximum monthly geometric mean | ≤ 126 MPN/100mL | all year | 001 |
| BOD, 5-day, percent removal | minimum | ≥ 85 % | all year | 001 |
| Solids, suspended percent removal | minimum | ≥ 85 % | all year | 001 |
| Flow, total | monthly total | report only (Mgal/mo) | all year | 001 |
| BOD, 5-day, 20 deg. C | monthly average | report only (mg/L) | all year | 101 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 101 |
Cited limits by parameter: Maryland's rules and the federal ones.
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