Exemptions: residential systems
 5. (1) If a large municipal residential system or small municipal residential system obtains all of its water from a drinking water system described in subsection (1.1), Schedules 1, 7, 10, 11 and 13 do not apply to the system that obtains the water, except for the following provisions: 1. Section 7-1, subsections 7-2 (3) to (6) and section 7-5 of Schedule 7. 2. Sections 10-1 and 10-2 of Schedule 10. 3. Sections 11-1, 11-2 and 11-4 of Schedule 11. 4. Sections 13-1, 13-5, 13-6, 13-6.1, 13-10 and 13-11 of Schedule 13.  O. Reg. 247/06, s. 3 (1); O. Reg. 399/07, s. 2 (1); O. Reg. 458/16, s. 3 (1). (1.1) Subsection (1) applies if the drinking water system from which water is obtained, (a) is a large municipal residential system or small municipal residential system to which this Regulation applies; (b) provides primary disinfection in accordance with section 1-3 of Schedule 1, or provides filtration and primary disinfection in accordance with section 1-4 of Schedule 1; and (c) provides secondary disinfection in accordance with section 1-5 of Schedule 1.  O. Reg. 247/06, s. 3 (1). (2) If a non-municipal year-round residential system obtains all of its water from a drinking water system described in subsection (3.1), Schedules 2, 8, 11, 13 and 21 do not apply to the system that obtains the water, except for the following provisions: 1. Sections 8-1 and 8-2, subsections 8-3 (3) and (3.1) and sections 8-5 and 8-7 of Schedule 8. 2. Sections 11-1, 11-2 and 11-4 of Schedule 11. 3. Sections 13-1, 13-5, 13-10 and 13-11 of Schedule 13. 4. If the system that obtains the water rechlorinates the water, sections 13-6 and 13-6.1 of Schedule 13 and Schedule 21.  O. Reg. 170/03, s. 5 (2); O. Reg. 249/03, s. 3 (2); O. Reg. 247/06, s. 3 (2, 3); O. Reg. 399/07, s. 2 (2); O. Reg. 458/16, s. 3 (2, 3). (3) If a non-municipal seasonal residential system obtains all of its water from a drinking water system described in subsection (3.1), Schedules 2, 9, 12, 15 and 21 do not apply to the system that obtains the water, except for the following provisions: 1. Sections 9-1 and 9-2, subsections 9-3 (3) and (3.1) and sections 9-5, 9-6 and 9-8 of Schedule 9. 2. Sections 12-1, 12-2 and 12-4 of Schedule 12. 3. Sections 15-1 and 15-7 of Schedule 15. 4. If the system that obtains the water rechlorinates the water, Schedule 21. O. Reg. 247/06, s. 3 (4); O. Reg. 399/07, s. 2 (3); O. Reg. 458/16, s. 3 (4, 5). (3.1) Subsections (2) and (3) apply if the drinking water system from which water is obtained, (a) is a drinking water system to which this Regulation applies; (b) provides primary disinfection in accordance with section 1-3 of Schedule 1 or section 2-3 of Schedule 2, or provides filtration and primary disinfection in accordance with section 1-4 of Schedule 1 or section 2-4 of Schedule 2; and (c) provides secondary disinfection in accordance with section 1-5 of Schedule 1 or section 2-5 of Schedule 2.  O. Reg. 247/06, s. 3 (5). (4) This Regulation, except sections 8.1, 9, 10 and 10.1 and subsections 11 (2.1), (8) and (9), does not apply to a drinking water system that obtains all of its water from another drinking water system if, (a) pursuant to subsection (1), (2) or (3), the drinking water system that obtains the water is exempt from provisions of this Regulation; and (b) the owner of the drinking water system from which the water is obtained has agreed in writing, (i) to ensure that the treatment equipment that provides secondary disinfection in accordance with section 1-5 of Schedule 1 or 2-5 of Schedule 2 is operated so that, at all times and at all locations within the distribution system of the system that obtains the water, (A) the free chlorine residual is never less than 0.05 milligrams per litre, if the drinking water system from which the water is obtained provides chlorination and does not provide chloramination, or (B) the combined chlorine residual is never less than 0.25 milligrams per litre, if the drinking water system from which the water is obtained provides chloramination, (ii) to sample and test the water in the distribution system of the system that obtains the water as if it were part of the distribution system of the system from which the water is obtained, and (iii) to comply, on behalf of the owner of the system that obtains the water and the operating authority for the system, (A) with Schedule 15.1, in the case of a large municipal residential system, a small municipal residential system or a non-municipal year-round residential system, or (B) with Schedule 15.2, in the case of a seasonal residential system.  O. Reg. 269/03, s. 2 (2); O. Reg. 247/06, s. 3 (6); O. Reg. 399/07, s. 2 (4). (5) If a drinking water system obtains water from another drinking water system and the owner of the system from which water is obtained has agreed in writing to do anything referred to in subclauses (4) (b) (i), (ii) and (iii), the owner shall comply with the agreement.  O. Reg. 247/06, s. 3 (7); O. Reg. 418/09, s. 3. (6) This section applies whether the water that is obtained, (a) is obtained through connections; (b) is obtained through transportation; or (c) is obtained through a combination of connections and transportation.  O. Reg. 247/06, s. 3 (7).