Interpretation: specifying small drinking water systems
 1. (1) For the purpose of this Regulation, the following drinking water systems are specified as small drinking water systems: 1. Large municipal non-residential systems. 2. Small municipal non-residential systems. 3. Non-municipal seasonal residential systems. 4. Large non-municipal non-residential systems. 5. Small non-municipal non-residential systems.  O. Reg. 318/08, s. 1 (1). (2) In this Regulation, “large municipal non-residential system” means a municipal drinking water system that does not serve a major residential development and is capable of supplying drinking water at a rate of more than 2.9 litres per second; “large non-municipal non-residential system” means a non-municipal drinking water system that is capable of supplying drinking water at a rate of more than 2.9 litres per second and does not serve, (a) a major residential development, or (b) a trailer park or campground that has more than five service connections; “non-municipal seasonal residential system” means a non-municipal drinking water system that, (a) serves, (i) a
major residential development, or (ii) a
trailer park or campground that has more than five service connections, and (b) does not operate to supply water to a development, trailer park or campground referred to in clause (a)
for at least 60 consecutive days in, (i) every calendar year, or (ii) every period that begins on April 1 in one year and ends on March 31 in the following year; “small municipal non-residential system” means a municipal drinking water system that does not serve a major residential development, is not capable of supplying drinking water at a rate of more than 2.9 litres per second and serves a public facility; “small non-municipal non-residential system” means a non-municipal drinking water system that is not capable of supplying drinking water at a rate of more than 2.9 litres per second, serves a public facility and does not serve, (a) a major residential development, or (b) a trailer park or campground that has more than five service connections.  O. Reg. 318/08, s. 1 (2). (3) Despite the definition of “large municipal non-residential system” in subsection (2), a drinking water system described in that definition that has one or more distribution lines that supply water exclusively for operations described in subsection (4), shall be deemed to be a small municipal non-residential system for the purposes of this Regulation if the result of the following calculation is 2.9 litres per second or less: A – B where, A = the maximum rate, expressed in litres per second, at which the drinking water system can supply drinking water, B = the sum of the average rates, expressed in litres per second, at which the drinking water system supplied drinking water in the preceding calendar year to the distribution lines that supply water exclusively for operations described in subsection (4). O. Reg. 318/08, s. 1 (3). (4) The operations referred to in subsections (3) and (7) are the following: 1. Agricultural operations. 2. Landscaping operations. 3. Industrial or manufacturing operations, including food manufacturing or processing operations. 4. Swimming pool or skating rink maintenance operations.  O. Reg. 318/08, s. 1 (4). (5) Despite subsection (3) and the definition of “large municipal non-residential system” in subsection (2), a drinking water system described in subsection (3) shall be deemed, during the calendar year in which the system begins operation, to be a small municipal non-residential system for the purposes of this Regulation if the owner of the system, on reasonable grounds, estimates that the result of the calculation referred to in subsection (3) would be 2.9 litres per second or less if the system had operated during all of the preceding calendar year.  O. Reg. 318/08, s. 1 (5). (6) If a drinking water system is deemed to be a small municipal non-residential system under subsection (3) or (5) and the system does not serve any public facilities, this Regulation does not apply to the system.  O. Reg. 318/08, s. 1 (6). (7) Despite the definition of “large non-municipal non-residential system” in subsection (2), a drinking water system described in that definition that has one or more distribution lines that supply water exclusively for operations described in subsection (4) shall be deemed to be a small non-municipal non-residential system for the purposes of this Regulation if the result of the following calculation is 2.9 litres per second or less: A – B where, A = the maximum rate, expressed in litres per second, at which the drinking water system can supply drinking water, B = the sum of the average rates, expressed in litres per second, at which the drinking water system supplied drinking water in the preceding calendar year to the distribution lines that supply water exclusively for operations described in subsection (4). O. Reg. 318/08, s. 1 (7). (8) Despite subsection (7) and the definition of “large non-municipal non-residential system” in subsection (2), a drinking water system described in subsection (7) shall be deemed, during the calendar year in which the system begins operation, to be a small non-municipal non-residential system for the purposes of this Regulation if the owner of the system, on reasonable grounds, estimates that the result of the calculation referred to in subsection (7) would be 2.9 litres per second or less if the system had operated during all of the preceding calendar year.  O. Reg. 318/08, s. 1 (8). (9) If a drinking water system is deemed to be a small non-municipal non-residential system under subsection (7) or (8) and the system does not serve any public facilities, this Regulation does not apply to the system.  O. Reg. 318/08, s. 1 (9). (10) For the purposes of the definition of “non-municipal seasonal residential system” in subsection (2), a drinking water system that, during the 365-day period that begins on the day the system begins operation, will not supply water for at least 60 consecutive days to a major residential development, trailer park or campground referred to in clause (a) of that definition shall be deemed, during that 365-day period, to be a drinking water system that does not operate to supply water to a development, trailer park or campground referred to in clause (a) of that definition for at least 60 consecutive days in every calendar year.  O. Reg. 318/08, s. 1 (10).