Wastewater Systems Effluent Regulations

Marginal note:Un-ionized ammonia

• 14 (1) The concentration of un-ionized ammonia in the effluent must be determined in accordance with the following formula:

  total ammonia × 1 ÷ (1 +10^{9.56 – pH})

  where

  total ammonia

  is the concentration of total ammonia — namely, un-ionized ammonia (NH₃) plus ionized ammonia (NH₄⁺) — determined in accordance with subsection (2), expressed in mg/L as nitrogen (N); and

  pH

  is the pH of the effluent adjusted to 15°C ± 1°C and determined in accordance with subsection (3).

• Marginal note:Concentration of total ammonia

  (2) The concentration of total ammonia in the effluent must be determined by using an aliquot of the same sample of effluent from which the pH of the effluent was determined and testing it in accordance with a total ammonia test.

• Marginal note:pH

  (3) The pH of the effluent must be determined by using an aliquot of the same sample of effluent from which the concentration of total ammonia of the effluent was determined and testing it in accordance with a pH test.