CEPIS/OPS- Pollution limits for discharge of tennery effluents into water bodies and sewers

USA Parameter	Surface	Sewer
pH Temperature ºC Suspended solids mg/l Settleable solids ml/l BOD5 mg 02/l COD mg/l	5.0-9.0 60 40	6.0-10.0
Sulphide mg S2-/l Chrome (lll) mg/l Chrome (IV) mg/l Chrome total mg/l	1	24 8 8
Chlorides mg/l Sulphates mg/l Ammonia mg N/l TNK mg N/l Oil/grease mh/l Phenols mg/l		10
Solvents mg/l: Hydrocarbons mg/l Nitrogenous mg/l Chlorimated mg/l

VENEZUELA Parameter	Surface	Sewer
pH Temperature ºC Suspended solids mg/l Settleable solids ml/l BOD5 mg 02/l COD mg/l	6.0-9.0 60 60 350	6.0-9.0 400 400 1000
Sulphide mg S2-/l Chrome (lll) mg/l Chrome (IV) mg/l Chrome total mg/l	0.5 0.5 2	2 0.5 3
Chlorides mg/l Sulphates mg/l Ammonia mg N/l TNK mg N/l Oil/grease mh/l Phenols mg/l	10 20 0.5	300 400 80 150 0.5
Solvents mg/l: Hydrocarbons mg/l Nitrogenous mg/l Chlorimated mg/l

ZIMBABWE Parameter	Surface	Sewer
pH Temperature ºC Suspended solids mg/l Settleable solids ml/l BOD5 mg 02/l COD mg/l	> 7.5 45 600 2000	6.5-12 45 6000 6000
Sulphide mg S2-/l Chrome (lll) mg/l Chrome (IV) mg/l Chrome total mg/l	10	200 10
Chlorides mg/l Sulphates mg/l Ammonia mg N/l TNK mg N/l Oil/grease mh/l Phenols mg/l	300 450	4000 300 450
Solvents mg/l: Hydrocarbons mg/l Nitrogenous mg/l Chlorimated mg/l