Priority 2 Determinands

Microbiological contaminants should be monitored for in all supplies and hence are known as Priority 1 determinands. A second level, defined as Priority 2 determinands, do not have to be measured in every supply but are specified for only those supplies which the Ministry of Health believes exceed half the maximum allowable value (MAV) for a particular health-significant determinand.

Only supplies with populations of 100 or more have been assessed, and the population must be at least 500 before a Priority 2 determinand is officially assigned and appears in the Register of Community Drinking-Water Supplies in New Zealand (and hence have "Test for" in these web pages.)

Currently Assigned Official Priority 2 Determinands

This list will be updated weekly from the National WINZ database.

Treatment Plants

Click on an abbreviation to see a list of Communities receiving water from Plants with this P2 Determinand

Abbrev.	Determinand	Plants	for Zones	in Supplies	Zone Pop
As	Arsenic	1	1	1	900
ClO3	Chlorate	3	3	3	1,660
F	Fluoride	48	121	47	2,275,312
NO3	Nitrate (as NO3)	1	3	1	19,153

Distribution Zones

Click on an abbreviation to see a list of Distribution Zones with this P2 Determinand

Abbreviation	Determinand	Assigned	Population
Sb	Antimony	4	5,114
As	Arsenic	14	55,479
B	Boron	1	1,332
CHBCl2	Bromodichloromethane	2	9,650
Cd	Cadmium	6	4,268
Cu	Copper	13	12,759
DCA	Dichloroacetic acid	9	12,836
F	Fluoride	1	1,332
Pb	Lead	37	100,314
Mn	Manganese	4	3,561
MAVHAA	MAV sum ratio for HAAs	18	77,988
MAVTHM	MAV sum ratio for THMs	13	76,235
Ni	Nickel	16	22,452
NO3	Nitrate (as NO3)	4	13,009
TCA	Trichloroacetic acid	6	6,898

Source: Water Information New Zealand, as extracted from the National WINZ database on 30 Jan 2012.