The Natural Mineral Water, Spring Water and Bottled Drinking Water Regulations (Northern Ireland) 2015 No. 365

SCHEDULE 9 Monitoring for radioactive substances in water bottled and labelled as “spring water” and bottled drinking water

PART 2 Minimum sampling and analysis frequencies

Volume of water produced each day within a supply zone(1) (2)m3	Number of samples per year (3)
(1) A supply zone is a geographically defined area within which water intended for human consumption comes from one or more sources and within which water quality may be considered as being approximately uniform.
(2) The volumes are calculated as averages taken over a calendar year.
(3) As far as possible, the number of samples should be distributed equally in time and location.
volume ≤ 100	1
100 < volume ≤ 100	1
1,000 < volume ≤ 10,000	1
	+1 for each 3,300m3/d and part thereof of the total volume
10, 000 < volume ≤ 100,000	3
	+1 for each 10,000 m3/d and part thereof of the total volume
volume > 100,000	10
	+1 for each 25,000 m3/d and part thereof of the total volume