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Industrial or other facility, Preston, Maryland. NPDES permit MD0071552, in force until Nov 30, 2028. Last 12 months: over a limit 9 times (last July 2026), 1 of 22 reports late. Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| January 2026 | pH, maximum | 9.23 SU | ≤ 8.5 SU | — |
| February 2026 | pH, maximum | 9.37 SU | ≤ 8.5 SU | — |
| May 2026 | Oxygen, dissolved [DO], instantaneous minimum | 2.55 mg/L | ≥ 5 mg/L | 49% |
| June 2026 | Nitrogen, Kjeldahl, total [as N], maximum monthly average | 3.66 mg/L | ≤ 2 mg/L | 83% |
| June 2026 | Nitrogen, Kjeldahl, total [as N], maximum weekly average | .542 lb/d | ≤ .5 lb/d | 8% |
| June 2026 | Nitrogen, Kjeldahl, total [as N], maximum weekly average | 7.25 mg/L | ≤ 3 mg/L | 142% |
| June 2026 | Nitrogen, ammonia total [as N], maximum monthly average | 2.38 mg/L | ≤ 2.3 mg/L | 3% |
| June 2026 | Oxygen, dissolved [DO], instantaneous minimum | .97 mg/L | ≥ 5 mg/L | 81% |
| July 2026 | Oxygen, dissolved [DO], instantaneous minimum | 2.18 mg/L | ≥ 5 mg/L | 56% |
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| Oxygen, dissolved [DO] | instantaneous minimum | ≥ 5 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 15 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 22 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 2.5 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 3.7 lb/d | all year | 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 | ≤ 5 lb/d | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 7.5 lb/d | all year | 001 |
| Nitrogen, total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 001 |
| Nitrogen, total [as N] | cumulative total | report only (lb/yr) | all year | 001 |
| Nitrogen, total [as N] | annual maximum | ≤ 0 lb/yr | Dec | 001 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 2.3 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 9 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 7 mg/L | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ .4 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | maximum monthly average | ≤ 1.5 lb/d | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, ammonia total [as N] | maximum daily average | ≤ 1.2 lb/d | May–Oct | 001 |
| Nitrogen, ammonia total [as N] | daily average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (mg/L) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum monthly average | ≤ 2 mg/L | May–Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum weekly average | ≤ 3 mg/L | May–Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum monthly average | ≤ .3 lb/d | May–Oct | 001 |
| Nitrogen, Kjeldahl, total [as N] | monthly average | report only (lb/d) | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, Kjeldahl, total [as N] | maximum weekly average | ≤ .5 lb/d | May–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] | cumulative total | ≤ 18 lb/yr | all year | 001 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 001 |
| Carbon, dissolved organic [as C] | quarterly average | report only (mg/L) | all year | 001 |
| Aluminum, total recoverable | quarterly average | report only (mg/L) | 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 |
| Chlorine, total residual | maximum | ≤ .029 mg/L | all year | 001 |
| Enterococci | maximum monthly geometric mean | ≤ 35 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 |
| 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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