1.3. Hydraulic capacity: For the purposes of sections 11.1, 16.2, 87.8 and 87.14, the hydraulic capacity of an individual waste water treatment system complying with NQ Standard 3680-910 must be equal to or greater than the total daily flow of an isolated dwelling according to the number of bedrooms as below:
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Number of bedrooms Total daily flow (litres)
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1 540
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2 1080
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3 1260
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4 1440
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5 1800
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6 2160
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In the case of another building, the hydraulic capacity of an individual waste water treatment system must be equal to or greater than the total daily flow of waste water, grey water and toilet effluents from that building.