EPA · Montana · discharge permits by parameter

Flow rate in Montana

• 323Permits carrying a limit
• 15With a recorded exceedance
• 3,490Nationwide

Permits

Other parameters in Montana

• Solids, total suspended566
• pH350
• Nitrite + Nitrate total [as N]341
• Nitrogen, total [as N]270
• BOD, 5-day, 20 deg. C267
• Phosphorus, total [as P]263
• Nitrogen, ammonia total [as N]248
• Nitrogen, Kjeldahl, total [as N]234
• E. coli, MTEC-MF198
• Oil and grease visual190
• Oil and grease, hexane extr method161
• Oil & Grease147
• BOD, 5-day, percent removal118
• Chlorine, total residual109
• Temperature, water deg. centigrade102
• Solids, suspended percent removal97
• Water level at sample collection time91
• Turbidity86
• Specific conductance86
• Solids, total dissolved [TDS]85
• Copper, total recoverable82
• Chloride [as Cl]82
• Lead, total recoverable72
• Iron, total [as Fe]71
• Zinc, total recoverable69
• Flow rate64
• Chemical Oxygen Demand [COD]63
• Duration of discharge60
• Hardness, total [as CaCO3]57
• Outfall observation,visual, y/n response57
• Duration56
• Cadmium, total recoverable53
• Arsenic, total recoverable53
• Conductivity51
• Zinc, total [as Zn]45
• Temperature, water deg. fahrenheit43
• Coliform, fecal general42
• Pass/Fail Static Renewal 96Hr Acute Pimephales Promelas42
• Iron, total recoverable41
• Oxygen, dissolved [DO]41
• Selenium, total recoverable41
• Aluminum, dissolved [as Al]41
• Mercury, total recoverable40
• Pass/Fail Static Renewal 48Hr Acute Ceriodaphnia dubia39
• Chromium, total recoverable37
• Flow, in conduit or thru treatment plant37
• Lead, total [as Pb]33
• Nickel, total recoverable33
• Sulfate, total [as SO4]32
• Silver total recoverable31
• Copper, total [as Cu]30
• Arsenic, total [as As]29
• Report due [yrmoda]29
• Antimony, total recoverable26
• Cyanide, total [as CN]26
• Cadmium, total [as Cd]25
• Thallium, total recoverable23
• Nitrogen, nitrate total [as N]23
• Nickel, total [as Ni]22
• Beryllium, total recoverable [as Be]21

Flow rate nationwide