R18-11-305. Class B+ Reclaimed Water

A. Class B+ reclaimed water is wastewater that has undergone secondary treatment, nitrogen removal treatment, and disinfection. B. An owner of a facility shall ensure that: 1. Class B+ reclaimed water meets the following criteria after disinfection treatment and before discharge to a reclaimed water distribution system: a. The concentration of fecal coliform organisms in four of the last seven daily reclaimed water samples is less than 200 / 100 ml. b. The single sample maximum concentration of fecal coliform organisms in a reclaimed water sample is less than 800 / 100 ml. 2. The 5-sample geometric mean concentration of total nitrogen in a reclaimed water sample is less than 10 mg / L. C. Class B+ reclaimed water is not required for a type of direct reuse. A person may use Class B+ reclaimed water for a type of direct reuse listed as Class B or Class C in Table A. A person shall not use Class B+ reclaimed water for a type of direct reuse listed as Class A in Table A.