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	4	5	4	3,610
F	Fluoride	50	122	60	2,216,244
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	5	135,927
As	Arsenic	16	58,886
B	Boron	2	2,732
CHBCl2	Bromodichloromethane	4	15,479
Cd	Cadmium	15	20,001
Cu	Copper	16	27,530
DCA	Dichloroacetic acid	16	32,196
F	Fluoride	1	1,332
Pb	Lead	75	336,408
Mn	Manganese	2	1,170
MAVHAA	MAV sum ratio for HAAs	30	114,946
MAVTHM	MAV sum ratio for THMs	17	82,424
Ni	Nickel	31	53,424
NO3	Nitrate (as NO3)	4	95,809
T3CALD	Trichloroacetaldehyde	32	143,864
TCA	Trichloroacetic acid	10	14,158

Source: Water Information New Zealand, as extracted from the National WINZ database on 22 Dec 2008.