urban-waste-water-treatment

Urban Waste Water Treatment Directive, Annex I: Discharge requirements

EU. Urban Waste Water Treatment: Annex I, Tables 1 & 2, Directive 91/271/EEC, last amended by Directive 2013/64/EU, 28 December 2013

This list contains requirements for (1) discharges from urban waste water treatment plants (Annex I, Table 1), and (2) discharges to sensitive areas (Annex I, Table 2), under Directive 91/271/EEC.

Last updated 03 April 2021. Database contains 10 unique substances/entries.
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25 mg/l
Homogenized, unfiltered, undecanted sample. Determination of dissolved oxygen before and after five-day incubation at 20 °C ± 1 °C, in complete darkness. Addition of a nitrification inhibitor
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Homogenized, unfiltered, undecanted sample. Determination of dissolved oxygen before and after five-day incubation at 20 °C ± 1 °C, in complete darkness. Addition of a nitrification inhibitor
under Article 4 (2)
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125 mg/l
Homogenized, unfiltered, undecanted sample Potassium dichromate
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10 mg/l
Molecular absorption spectrophotometry
more than 100000 p.e.
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15 mg/l
Molecular absorption spectrophotometry
10000 - 100000 p.e.
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2 mg/l
Molecular absorption spectrophotometry
10000 - 100000 p.e.
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1 mg/l
Molecular absorption spectrophotometry
more than 100000 p.e.
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35 mg/l
Filtering of a representative sample through a 0,45 μm filter membrane. Drying at 105 °C and weighing
Centrifuging of a representative sample (for at least five mins with mean acceleration of 2800 to 3200 g), drying at 105 °C and weighing
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35 mg/l
Filtering of a representative sample through a 0,45 μm filter membrane. Drying at 105 °C and weighing
Centrifuging of a representative sample (for at least five mins with mean acceleration of 2800 to 3200 g), drying at 105 °C and weighing
under Article 4 (2) (more than 10000 p.e.)
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60 mg/l
Filtering of a representative sample through a 0,45 μm filter membrane. Drying at 105 °C and weighing
Centrifuging of a representative sample (for at least five mins with mean acceleration of 2800 to 3200 g), drying at 105 °C and weighing
under Article 4 (2) (2000 -10000 p.e.)
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