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The Pennsylvania Code website reflects the Pennsylvania Code changes effective through 54 Pa.B. 2336 (April 27, 2024).

25 Pa. Code § 73.165. Disinfection.

§ 73.165. Disinfection.

 (a)  Disinfection of effluent is required prior to spraying. The disinfection shall be by chlorination and shall produce an effluent which will contain a concentration not greater than 200 fecal coliform organisms per 100 milliliters in a single sample. Disinfection units shall be installed in accordance with the manufacturer’s specifications. Disinfection units shall be reliable, able to disinfect sewage effluent and be easily maintained by the property owner.

 (b)  A chlorinator shall be designed to maintain a chlorine residual of 0.2 PPM to 2 PPM and provide for a 30 minute contact time.

   (1)  When an erosion chlorinator is proposed, the base of the unit may be placed no deeper than 36 inches below finished grade.

   (2)  When a lift pump is used to keep the unit no deeper than 36 inches below finished grade, the pump shall have a discharge rate that does not exceed the manufacturer’s specifications for the erosion chlorinator and shall meet the appropriate specification of §  73.46 (relating to dosing pumps, siphons and lift pumps).

   (3)  Chlorine contact time may be obtained using a separate chlorine contact tank or in-line chlorination followed by the storage tank.

   (4)  Chlorinators shall be housed separately from chlorine contact tanks or storage tanks unless the tanks are specifically designed to house chlorinators.


   The provisions of this §  73.165 issued under section 9 of the Pennsylvania Sewage Facilities Act (35 P. S. §  750.9); The Clean Streams Law (35 P. S. § §  691.1—691.1001); and section 1920-A of The Administrative Code of 1929 (71 P. S. §  510-20).


   The provisions of this §  73.165 adopted November 7, 1997, effective November 8, 1997, 27 Pa.B. 5877.

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