567—81.6 (455B) Grade A classification.
	 81.6(1) Grade A water system classification.
	  a.   	 Community water system. A community water system, other than a municipal or rural water system, which serves a population of 250 persons or less and provides no treatment other than hypochlorination or treatment which does not require any chemical addition, process adjustment, backwashing or media regeneration by an operator shall be classified as a Grade A water system.
	  b.   	 Nontransient noncommunity water system. A nontransient noncommunity water system which serves a population of 500 persons or less and provides no treatment other than hypochlorination or treatment which does not require any chemical addition, process adjustment, backwashing or media regeneration by an operator shall be classified as a Grade A water system.
	 81.6(2) Certification requirements for Grade A water systems. Any grade of water treatment certification will satisfy the certification requirements for a Grade A water system with hypochlorination. Any grade of water distribution certification will satisfy the certification requirements for a Grade A water system without hypochlorination.