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Coal And Other Minerals And Ores, Baltimore, Maryland. NPDES permit MD0055824 expired Jul 31, 2026; its limits still apply. Last 12 months: no values over a limit, 18 required values missing, 9 of 27 reports late. Source: EPA ECHO, Oct 22, 2026.
| Parameter | Statistic | Limit | Months | Outfall |
|---|---|---|---|---|
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| pH | maximum | ≤ 9 SU | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 002 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 002 |
| Solids, total suspended | annual maximum | ≤ 6420 lb/yr | all year | 002 |
| Solids, total suspended | annual maximum | ≤ 6420 lb/yr | all year | 002 |
| Solids, total suspended | monthly load | report only (lb/mo) | all year | 002 |
| Solids, total suspended | monthly load | report only (lb/mo) | all year | 002 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 002 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 002 |
| Cadmium, dissolved [as Cd] | monthly average | report only (ug/L) | all year | 002 |
| Cadmium, dissolved [as Cd] | monthly average | report only (ug/L) | all year | 002 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | 002 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | 002 |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year | 002 |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year | 002 |
| Cadmium, total [as Cd] | daily maximum | ≤ 40 ug/L | all year | 002 |
| Cadmium, total [as Cd] | daily maximum | ≤ 40 ug/L | all year | 002 |
| Copper, dissolved [as Cu] | monthly average | report only (ug/L) | all year | 002 |
| Copper, dissolved [as Cu] | monthly average | report only (ug/L) | all year | 002 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ 9.2 ug/L | all year | 002 |
| Copper, total [as Cu] | daily maximum | ≤ 9.2 ug/L | all year | 002 |
| Nickel, dissolved [as Ni] | monthly average | report only (ug/L) | all year | 002 |
| Nickel, dissolved [as Ni] | monthly average | report only (ug/L) | all year | 002 |
| Nickel, dissolved [as Ni] | daily maximum | report only (ug/L) | all year | 002 |
| Nickel, dissolved [as Ni] | daily maximum | report only (ug/L) | all year | 002 |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year | 002 |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year | 002 |
| Nickel, total [as Ni] | daily maximum | ≤ 111 ug/L | all year | 002 |
| Nickel, total [as Ni] | daily maximum | ≤ 111 ug/L | all year | 002 |
| Zinc, dissolved [as Zn] | monthly average | report only (ug/L) | all year | 002 |
| Zinc, dissolved [as Zn] | monthly average | report only (ug/L) | all year | 002 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 002 |
| Zinc, total [as Zn] | daily maximum | ≤ 90 ug/L | all year | 002 |
| Zinc, total [as Zn] | daily maximum | ≤ 90 ug/L | all year | 002 |
| Selenium, dissolved [as Se] | monthly average | report only (ug/L) | all year | 002 |
| Selenium, dissolved [as Se] | monthly average | report only (ug/L) | all year | 002 |
| Selenium, dissolved [as Se] | daily maximum | report only (ug/L) | all year | 002 |
| Selenium, dissolved [as Se] | daily maximum | report only (ug/L) | all year | 002 |
| Selenium, total [as Se] | monthly average | report only (ug/L) | all year | 002 |
| Selenium, total [as Se] | monthly average | report only (ug/L) | all year | 002 |
| Selenium, total [as Se] | daily maximum | ≤ 290 ug/L | all year | 002 |
| Selenium, total [as Se] | daily maximum | ≤ 290 ug/L | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 002 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| pH | maximum | ≤ 9 SU | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 003 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 003 |
| Solids, total suspended | annual maximum | ≤ 6420 lb/yr | all year | 003 |
| Solids, total suspended | annual maximum | ≤ 6420 lb/yr | all year | 003 |
| Solids, total suspended | monthly load | report only (lb/mo) | all year | 003 |
| Solids, total suspended | monthly load | report only (lb/mo) | all year | 003 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 003 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 003 |
| Cadmium, dissolved [as Cd] | monthly average | report only (ug/L) | all year | 003 |
| Cadmium, dissolved [as Cd] | monthly average | report only (ug/L) | all year | 003 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | 003 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | 003 |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year | 003 |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year | 003 |
| Cadmium, total [as Cd] | daily maximum | ≤ 40 ug/L | all year | 003 |
| Cadmium, total [as Cd] | daily maximum | ≤ 40 ug/L | all year | 003 |
| Copper, dissolved [as Cu] | monthly average | report only (ug/L) | all year | 003 |
| Copper, dissolved [as Cu] | monthly average | report only (ug/L) | all year | 003 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 003 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ 9.2 ug/L | all year | 003 |
| Copper, total [as Cu] | daily maximum | ≤ 9.2 ug/L | all year | 003 |
| Nickel, dissolved [as Ni] | monthly average | report only (ug/L) | all year | 003 |
| Nickel, dissolved [as Ni] | monthly average | report only (ug/L) | all year | 003 |
| Nickel, dissolved [as Ni] | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, dissolved [as Ni] | daily maximum | report only (ug/L) | all year | 003 |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year | 003 |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year | 003 |
| Nickel, total [as Ni] | daily maximum | ≤ 111 ug/L | all year | 003 |
| Nickel, total [as Ni] | daily maximum | ≤ 111 ug/L | all year | 003 |
| Zinc, dissolved [as Zn] | monthly average | report only (ug/L) | all year | 003 |
| Zinc, dissolved [as Zn] | monthly average | report only (ug/L) | all year | 003 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 003 |
| Zinc, total [as Zn] | daily maximum | ≤ 90 ug/L | all year | 003 |
| Zinc, total [as Zn] | daily maximum | ≤ 90 ug/L | all year | 003 |
| Selenium, dissolved [as Se] | monthly average | report only (ug/L) | all year | 003 |
| Selenium, dissolved [as Se] | monthly average | report only (ug/L) | all year | 003 |
| Selenium, dissolved [as Se] | daily maximum | report only (ug/L) | all year | 003 |
| Selenium, dissolved [as Se] | daily maximum | report only (ug/L) | all year | 003 |
| Selenium, total [as Se] | monthly average | report only (ug/L) | all year | 003 |
| Selenium, total [as Se] | monthly average | report only (ug/L) | all year | 003 |
| Selenium, total [as Se] | daily maximum | ≤ 290 ug/L | all year | 003 |
| Selenium, total [as Se] | daily maximum | ≤ 290 ug/L | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 003 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 003 |
| pH | minimum | ≥ 6 SU | all year | 004 |
| pH | minimum | ≥ 6 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| pH | maximum | ≤ 9 SU | all year | 004 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 004 |
| Solids, total suspended | monthly average | ≤ 30 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 004 |
| Solids, total suspended | daily maximum | ≤ 50 mg/L | all year | 004 |
| Solids, total suspended | annual maximum | ≤ 6420 lb/yr | all year | 004 |
| Solids, total suspended | annual maximum | ≤ 6420 lb/yr | all year | 004 |
| Solids, total suspended | monthly load | report only (lb/mo) | all year | 004 |
| Solids, total suspended | monthly load | report only (lb/mo) | all year | 004 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 004 |
| Oil & Grease | monthly average | report only (mg/L) | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Oil & Grease | daily maximum | ≤ 15 mg/L | all year | 004 |
| Cadmium, dissolved [as Cd] | monthly average | report only (ug/L) | all year | 004 |
| Cadmium, dissolved [as Cd] | monthly average | report only (ug/L) | all year | 004 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | 004 |
| Cadmium, dissolved [as Cd] | daily maximum | report only (ug/L) | all year | 004 |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year | 004 |
| Cadmium, total [as Cd] | monthly average | report only (ug/L) | all year | 004 |
| Cadmium, total [as Cd] | daily maximum | ≤ 40 ug/L | all year | 004 |
| Cadmium, total [as Cd] | daily maximum | ≤ 40 ug/L | all year | 004 |
| Copper, dissolved [as Cu] | monthly average | report only (ug/L) | all year | 004 |
| Copper, dissolved [as Cu] | monthly average | report only (ug/L) | all year | 004 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 004 |
| Copper, dissolved [as Cu] | daily maximum | report only (ug/L) | all year | 004 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 004 |
| Copper, total [as Cu] | monthly average | report only (ug/L) | all year | 004 |
| Copper, total [as Cu] | daily maximum | ≤ 9.2 ug/L | all year | 004 |
| Copper, total [as Cu] | daily maximum | ≤ 9.2 ug/L | all year | 004 |
| Nickel, dissolved [as Ni] | monthly average | report only (ug/L) | all year | 004 |
| Nickel, dissolved [as Ni] | monthly average | report only (ug/L) | all year | 004 |
| Nickel, dissolved [as Ni] | daily maximum | report only (ug/L) | all year | 004 |
| Nickel, dissolved [as Ni] | daily maximum | report only (ug/L) | all year | 004 |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year | 004 |
| Nickel, total [as Ni] | monthly average | report only (ug/L) | all year | 004 |
| Nickel, total [as Ni] | daily maximum | ≤ 111 ug/L | all year | 004 |
| Nickel, total [as Ni] | daily maximum | ≤ 111 ug/L | all year | 004 |
| Zinc, dissolved [as Zn] | monthly average | report only (ug/L) | all year | 004 |
| Zinc, dissolved [as Zn] | monthly average | report only (ug/L) | all year | 004 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 004 |
| Zinc, dissolved [as Zn] | daily maximum | report only (ug/L) | all year | 004 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 004 |
| Zinc, total [as Zn] | monthly average | report only (ug/L) | all year | 004 |
| Zinc, total [as Zn] | daily maximum | ≤ 90 ug/L | all year | 004 |
| Zinc, total [as Zn] | daily maximum | ≤ 90 ug/L | all year | 004 |
| Selenium, dissolved [as Se] | monthly average | report only (ug/L) | all year | 004 |
| Selenium, dissolved [as Se] | monthly average | report only (ug/L) | all year | 004 |
| Selenium, dissolved [as Se] | daily maximum | report only (ug/L) | all year | 004 |
| Selenium, dissolved [as Se] | daily maximum | report only (ug/L) | all year | 004 |
| Selenium, total [as Se] | monthly average | report only (ug/L) | all year | 004 |
| Selenium, total [as Se] | monthly average | report only (ug/L) | all year | 004 |
| Selenium, total [as Se] | daily maximum | ≤ 290 ug/L | all year | 004 |
| Selenium, total [as Se] | daily maximum | ≤ 290 ug/L | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 004 |
| Flow, in conduit or thru treatment plant | monthly average | report only (gal/d) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 004 |
| Flow, in conduit or thru treatment plant | daily maximum | report only (gal/d) | all year | 004 |
Cited limits by parameter: Maryland's rules and the federal ones.
Same industry: the 3 Wholesale Trade — Durable Goods permits in Maryland.
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Your permit document is the final word. As JSON: /api/v1/permits/MD0055824 · MCP: https://passage-data.com/mcp