EPA · Puerto Rico · discharge permits by parameter

Chromium, total [as Cr] in Puerto Rico

• 10Permits carrying a limit
• 10With a recorded exceedance
• 5,152Nationwide

Permits

Other parameters in Puerto Rico

• pH179
• Turbidity161
• Copper, total [as Cu]155
• Temperature, water deg. centigrade154
• Solids, settleable144
• Flow, in conduit or thru treatment plant144
• Oxygen, dissolved [DO]143
• Color [PT-CO units]134
• Chlorine, total residual130
• BOD, 5-day, 20 deg. C129
• Phosphorus, total [as P]107
• Lead, total [as Pb]105
• Solids, total suspended100
• Oil & Grease84
• Mercury, total [as Hg]80
• Sulfate, total [as SO4]73
• Zinc, total [as Zn]68
• Ammonia & ammonium- total64
• Coliform, fecal general62
• Surfactants [MBAS]62
• Solids, total dissolved53
• Sulfide-hydrogen sulfide [undissociated]52
• Whole Effluent Toxicity [WET] - D. magna51
• Whole Effluent Toxicity [WET] - P. promelas51
• Cyanide, free available49
• Coliform, fecal - % samples exceeding limit49
• Arsenic, total [as As]48
• Nitrogen, total [as N]47
• Solids, suspended percent removal45
• BOD, 5-day, percent removal45
• Cadmium, total [as Cd]44
• Nitrogen, ammonia, total [as NH3]42
• Coliform, total general40
• Enterococci38
• Cyanide, total [as CN]29
• Fluoride, total [as F]26
• Sulfide, total [as S]24
• Silver, total [as Ag]24
• Nitrite + Nitrate total [as N]23
• Chromium, hexavalent [as Cr]22
• Pentachlorophenol22
• Chemical Oxygen Demand [COD]18
• 2,4,6-Trichlorophenol17
• 2-Methyl-4,6-dinitrophenol17
• Solids, total dissolved- 180 deg. C16
• Nickel, total [as Ni]14
• Selenium, total [as Se]13
• 2-Chlorophenol12
• Phenol12
• 2,4-Dinitrophenol12
• Iron, total [as Fe]11
• 2,4-Dichlorophenol11
• Nitrite Plus Nitrate Total11
• Benzo[a]anthracene10
• Benzo[k]fluoranthene10
• Chrysene10
• Benzo[ghi]perylene9
• Fluorene9
• Ammonia nitrogen, total, [as N] 30 day9
• Acenaphthene9

Chromium, total [as Cr] nationwide