Drinking Water for New Zealand

Managed by ESR for the Ministry of Health.         Data extracted from the National WINZ Database.

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From 26 June 2017, data on this website is unchanging while the underlying databases are restructured.

Water Supplies

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 5 5 4 12,040
F Fluoride 47 138 50 2,290,313
MAVNOx MAV sum ratio for NO3 and NO2 1 1 1 3,520
NO3 Nitrate (as NO3) 3 3 3 22,798

Distribution Zones

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

Abbreviation Determinand Assigned Population
Sb Antimony 1 951
As Arsenic 11 26,022
CHBCl2 Bromodichloromethane 3 11,650
Cu Copper 4 4,200
DCA Dichloroacetic acid 8 11,245
Pb Lead 14 29,058
Mn Manganese 1 570
MAVHAA MAV sum ratio for HAAs 16 80,479
MAVTHM MAV sum ratio for THMs 17 88,170
Ni Nickel 2 1,700
NO3 Nitrate (as NO3) 11 16,164
TCA Trichloroacetic acid 6 6,898

Source: Water Information New Zealand, as extracted from the National WINZ database on 26 Jun 2017.



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