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Sewage treatment plant, major discharger, Berlin, Maryland. NPDES permit MD0023477, in force until Dec 31, 2029. Last 12 months: over a limit 7 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.
| Period ending | Parameter | Reported | Limit | Over by |
|---|---|---|---|---|
| October 2025 | BOD, 5-day, 20 deg. C, maximum weekly average | 19.85 mg/L | ≤ 15 mg/L | 32% |
| October 2025 | Nitrogen, total [as N], maximum monthly average | 4.59 mg/L | ≤ 3 mg/L | 53% |
| October 2025 | Phosphorus, total [as P], monthly average | .53 mg/L | ≤ .5 mg/L | 6% |
| January 2026 | Nitrogen, total [as N], maximum monthly average | 4.23 mg/L | ≤ 4 mg/L | 6% |
| February 2026 | Nitrogen, total [as N], maximum monthly average | 16.96 mg/L | ≤ 4 mg/L | 324% |
| March 2026 | Nitrogen, total [as N], maximum monthly average | 13.37 mg/L | ≤ 4 mg/L | 234% |
| April 2026 | BOD, 5-day, 20 deg. C, maximum weekly average | 15.97 mg/L | ≤ 15 mg/L | 6% |
| 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 | ≤ 10 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 15 mg/L | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum monthly average | ≤ 209 lb/d | all year | 001 |
| BOD, 5-day, 20 deg. C | maximum weekly average | ≤ 313 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 | ≤ 10 mg/L | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 15 mg/L | all year | 001 |
| Solids, total suspended | maximum monthly average | ≤ 209 lb/d | all year | 001 |
| Solids, total suspended | maximum weekly average | ≤ 313 lb/d | all year | 001 |
| Nitrogen, total [as N] | maximum monthly average | ≤ 3 mg/L | May–Oct | 001 |
| Nitrogen, total [as N] | monthly total | report only (lb/mo) | all year | 001 |
| Nitrogen, total [as N] | annual maximum | ≤ 31926 lb/yr | all year | 001 |
| Nitrogen, total [as N] | maximum monthly average | ≤ 4 mg/L | Jan, Feb, Mar, Apr, Nov, Dec | 001 |
| Nitrogen, total [as N] | EPA's "SEAS TDT" | ≤ 13811 lb/yr | May–Oct | 001 |
| Nitrogen, organic total [as N] | monthly average | report only (mg/L) | all year | 001 |
| Nitrogen, ammonia total [as N] | monthly average | report only (mg/L) | all year | 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 | ≤ .5 mg/L | all year | 001 |
| Phosphorus, total [as P] | monthly total | report only (lb/mo) | all year | 001 |
| Phosphorus, total [as P] | annual maximum | ≤ 4556 lb/yr | all year | 001 |
| Phosphorus, total [as P] | EPA's "SEAS TDT" | ≤ 2302 lb/yr | all year | 001 |
| Cyanide, free [amenable to chlorination] | quarterly average | report only (ug/L) | all year | 001 |
| Cyanide, free [amenable to chlorination] | quarterly average | report only (ug/L) | Mar, Jun, Sep, Dec | 001 |
| Phosphate, ortho [as P] | monthly average | report only (mg/L) | all year | 001 |
| Benzo[b]fluoranthene | quarterly average | report only (ug/L) | all year | 001 |
| Benzo[k]fluoranthene | quarterly average | report only (ug/L) | all year | 001 |
| Benzo[a]pyrene | quarterly average | report only (ug/L) | all year | 001 |
| Bis[2-chloroethoxy]methane | quarterly average | report only (ug/L) | all year | 001 |
| Chrysene | quarterly average | report only (ug/L) | all year | 001 |
| Indeno[1,2,3-cd]pyrene | quarterly average | report only (ug/L) | all year | 001 |
| Benzo[a]anthracene | quarterly average | report only (ug/L) | all year | 001 |
| Dibenz[a,h]anthracene | quarterly average | report only (ug/L) | all year | 001 |
| Benzidine | quarterly average | report only (ug/L) | all year | 001 |
| 4,4'-DDT | quarterly average | report only (ug/L) | all year | 001 |
| 4,4'-DDD | quarterly average | report only (mg/L) | all year | 001 |
| 4,4'-DDE | quarterly average | report only (ug/L) | all year | 001 |
| Aldrin | quarterly average | report only (ug/L) | all year | 001 |
| Chlordane [tech mix. and metabolites] | quarterly average | report only (ug/L) | all year | 001 |
| Dieldrin | quarterly average | report only (ug/L) | all year | 001 |
| Endrin | quarterly average | report only (ug/L) | all year | 001 |
| Toxaphene | quarterly average | report only (ug/L) | all year | 001 |
| Heptachlor | quarterly average | report only (ug/L) | all year | 001 |
| Heptachlor epoxide | quarterly average | report only (ug/L) | all year | 001 |
| Hexachlorobenzene | quarterly average | report only (ug/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 | ≤ .1 mg/L | all year | 001 |
| Coliform, fecal general | median | ≤ 14 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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On EPA ECHO: Facility report · DMR history
Your permit document is the final word. As JSON: /api/v1/permits/MD0023477 · MCP: https://passage-data.com/mcp