EPA · Maryland · discharge permits by parameter
Toxicity, Chronic in Maryland
- 7Permits carrying a limit
- 5With a recorded exceedance
- 100Nationwide
Permits
| Permit holder | NPDES ID | City | Program | Discharger | Receiving water |
|---|---|---|---|---|---|
| CITY OF SALISBURY WWTP | MD0021571 | SALISBURY | Publicly owned treatment works | Major | WICOMICO RIVER |
| BACK RIVER WWTP | MD0021555 | BALTIMORE COUNTY | Publicly owned treatment works | Major | BACK RIVER, BEAR CREEK & SEVERSTAL STEEL, LLC |
| FREEDOM DISTRICT WWTP | MD0021512 | SYKESVILLE | Publicly owned treatment works | Major | SOUTH BRANCH PATAPSCO RIVER |
| NRG MD - BRANDYWINE FLYASH MANAGEMENT SITE | MD0054836 | PRINCE GEORGE'S COUNTY | Minor | PATUXENT RIVER - MIDDLE |
Other parameters in Maryland
- Solids, total suspended531
- pH498
- Flow, in conduit or thru treatment plant480
- Chlorine, total residual265
- Flow199
- BOD, 5-day, 20 deg. C155
- Nitrite + Nitrate total [as N]145
- Nitrogen, total [as N]141
- Oxygen, dissolved [DO]131
- Zinc, total [as Zn]129
- Nitrogen, ammonia total [as N]117
- Phosphorus, total [as P]116
- Copper, total [as Cu]105
- pH change [range]102
- Oil & Grease98
- Lead, total [as Pb]97
- Iron, total [as Fe]91
- E. coli85
- Coliform, fecal general85
- Solids, settleable83
- Nitrogen, organic total [as N]82
- Flow, total77
- Temperature, water deg. fahrenheit72
- Cyanuric acid71
- Turbidity61
- Nitrogen, Kjeldahl, total [as N]55
- Benzene53
- Toluene51
- Petrol hydrocarbons, total recoverable50
- Phosphate, ortho [as P]46
- Aluminum, total recoverable45
- Temp. diff. between up/down stream deg. F42
- Turbidity, lab, NTU38
- Chloride [as Cl]35
- Methyl tert-butyl ether [MTBE]33
- Solids, total dissolved33
- Hardness, total [as CaCO3]32
- Nitrogen, nitrate total [as N]31
- Copper, total recoverable31
- Silver, total [as Ag]30
- Ethylbenzene29
- Chemical Oxygen Demand [COD]28
- Phosphate, total [as PO4]27
- Naphthalene25
- Nitrogen, nitrite total [as N]24
- Benzene, ethylbenzene, toluene, xylene combination23
- Phosphorous, in total orthophosphate22
- Ethylbenzene22
- Oil and grease22
- Xylene [mix of m+o+p]21
- Suspended Solids, Total21
- BTEX19
- Manganese, total [as Mn]19
- Aluminum, total [as Al]19
- Nickel, total [as Ni]19
- Copper, dissolved [as Cu]18
- Oxygen demand, chem. [COD], dissolved18
- Lead, total recoverable17
- Bromine, reported as the element17
- Xylenes [total], dry weight17