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Elementary And Secondary Schools, Newburg, Maryland. NPDES permit MD0023451, in force until Apr 30, 2031. Last 12 months: over a limit once (last October 2025). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, 5-day, 20 deg. C, maximum monthly average | 5.2 mg/L | ≤ 5 mg/L | 4% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 7 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 5 mg/L | May–Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 30 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 7.5 mg/L | May–Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 45 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ .52 lb/d | May–Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 3.13 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ .78 lb/d | May–Oct | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 4.69 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| pH | minimum | ≥ 6.5 SU | all year | 001 |
| pH | maximum | ≤ 8.5 SU | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 30 mg/L | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 45 mg/L | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 3.13 lb/d | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 4.69 lb/d | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .7 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 3.9 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 3.2 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .07 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .1 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ .41 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ .33 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 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 |
| Chlorine, total residual | maximum | ≤ .1 mg/L | all year | 001 |
| Coliform, fecal general | maximum | ≤ 14 MPN/100mL | 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 |
| 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 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 101 |
| Solids, total suspended | monthly average | report only (mg/L) | all year | 101 |
| Parameter | New limit | New or tighter | Median, last 12 months | × new limit |
|---|---|---|---|---|
| Nitrogen, ammonia total [as N], maximum monthly average | 0.03 lb/d (May–Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], maximum monthly average | 0.3 mg/L (May–Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], maximum monthly average | 0.04 lb/d (Jan, Feb, Mar, Apr, Nov, Dec) | tighter | 0.01 lb/d (3 values) | 0.25× |
| Nitrogen, ammonia total [as N], maximum monthly average | 0.4 mg/L (Jan, Feb, Mar, Apr, Nov, Dec) | tighter | 0.4 mg/L (3 values) | 1× |
| Nitrogen, ammonia total [as N], maximum daily average | 1.4 mg/L (May–Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], maximum daily average | 0.15 lb/d (May–Oct) | tighter | — | — |
| Nitrogen, ammonia total [as N], maximum daily average | 2.4 mg/L (Jan, Feb, Mar, Apr, Nov, Dec) | tighter | 1 mg/L (3 values) | 0.417× |
| Nitrogen, ammonia total [as N], maximum daily average | 0.25 lb/d (Jan, Feb, Mar, Apr, Nov, Dec) | tighter | 0.04 lb/d (3 values) | 0.16× |
Cited limits by parameter: Maryland's rules and the federal ones.
Same industry: the 20 Educational Services permits in Maryland.
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