TABLE OF WATER MONITORING PROGRAMMES
FOLLOWING 1080 AERIAL BAITING OPERATIONS
The Drinking-Water Standards for New Zealand, issued in 2005 (revised 2018) by the Ministry of Health, specify a Provisional Maximum Acceptable
Value (PMAV) for 1080 in water of 3.5 ppb. The PMAV value is one that, on the basis of present knowledge, is not considered to cause any significant
risk to the health of the consumer over a lifetime of consumption of the water. However, the Ministry of Health also recommends that water taken
from catchments sown with 1080 baits should not be used for human supply until tests show that the concentration of 1080 is below 2 ppb. The
figure of 2 ppb is an approximation of 50% of the PMAV value, and is applied to testing water for 1080 as a precautionary/conservative measure.
Operation by Region
Date
Positive
Conc. 1080
Remarks
(conc. 1080 in %)
samples
detected, ppb
(noted where provided by Client)
Otago (0.02%)
7/92
12
10 < 0.3
1 = 0.3
1 = 0.6
Taranaki (0.15%)
5-8/93
18
18 < 0.3
Contaminated containers
Auckland (0.08 and 0.15%)
6/94
8
1 = 0.7
Reticulated = 7
1 = 0.5
1 = 0.4
2 = 0.3
1 = 0.2
2 = 0.1
Marlborough (0.15%)
1 = 0.1
Sample with high result taken from bay at 6.00pm on 11/8/94
8/94
3
1 = 0.5
1 = 3.4
1 = 0.4
Tasman (0.15%)
8/94
2
1 = 0.6
Page 1 of 4
Operation by Region
Date
Positive
Conc. 1080
Remarks
(conc. 1080 in %)
samples
detected, ppb
(noted where provided by Client)
Manawatu-Wanganui (0.08%)
10-
Positive from site with bait visible in stream
11/94
1
0.2
Waikato (0.15%)
8-12/94
1
0.8
Positive sample where baits close to stream
Canterbury (0.08%)
5-6/95
1
0.2
Hawke's Bay (0.08%)
~9/95
1
0.3
Gisborne (0.15%)
5/96
1
0.2
Bait observed near stream
Manawatu-Wanganui (0.15%)
10/96
1
0.1
Manawatu-Wanganui (0.08%)
9/96
1
3.5
Contaminated sample at horseshoe bend 48 hours after
operation
Waikato
9/97
1
2.4
Taken from spillway of hydro lake. Think this was container
contamination from overalls
Bay of Plenty (0.15%)
10-
1
0.5
Sample from head-water junction, low flow, on day of drop,
11/97
baits observed in water
Taranaki
5-7/98
2
1=9.0
High result from sample taken on day of operation at weir
1=0.6
downstream from carrot baiting. Operator wearing
contaminated overalls, took sample in the dark.
Bay of Plenty (0.15%)
8/99
2
1 = 4.0
Positive samples taken at Site 2; same day and at 24 hours.
1 = 1.0
Resample after 6 days was negative.
Marlborough (0.15%)
9/99
1
0.2
Tasman
7/00
1
0.5
Canterbury
5/01
1
0.3
No reason for +ve.
Page 2 of 4
Operation by Region
Date
Positive
Conc. 1080
Remarks
(conc. 1080 in %)
samples
detected, ppb
(noted where provided by Client)
Tasman (0.15%)
6/01
1
0.2
Otago
7/02
1
0.8
The first +ve on the day after the drop, and the second on the
Canterbury
8/02
2
1=1.0
1=0.8
day of the drop. Both sites within the treatment area. Bait
seen on the access road.
Hawkes Bay
9/02
1
0.6
Canterbury (0.15%)
7/04
1
0.2
Sample taken on the day of the operation, from a small
stream.
Waikato (0.15%)
5/05
1
0.2
Positive sample taken from river on 25/5/05: 2300hrs.
Southland
7/05
1
0.2
Manawatu-Wanganui
8/05
2
1 = 0.1
1 = 0.4
West Coast
1/06
1
0.1
Hawkes Bay
5/06
1
1.3
Waikato
9/06
1
0.1
Bay of Plenty
9/06
2
1 = 0.1
1 = 0.5
Southland
10/06
4
3 = 0.2
1= 0.4
West Coast
1/07
1
0.2
Not a drinking water supply
West Coast
7/07
1
0.2
May have been a domestic water supply.
Southland
9/07
2
1=0.5
1= 2.3
Samples from streams containing 1080 baits.
West Coast
8/08
2
2=0.2
Stock water supplies affected
Manawatu-Wanganui
12/08
1
0.1
Not a domestic supply
Page 3 of 4
Operation by Region
Date
Positive
Conc. 1080
Remarks
(conc. 1080 in %)
samples
detected, ppb
(noted where provided by Client)
West Coast
6/09
1
0.2
Water supply for a picnic area, closed down during operation
West Coast
6/09
1
0.1
Water tank for domestic and stock water supplied by a stream
1=1.6
West Coast
8/09
3
1=0.3
Contamination of the sample bottles by the control operator
1=0.5
West Coast
8/09
1
0.1
Not a domestic supply
Canterbury
7/09
1
0.3
No domestic supplies affected
Waikato
10/11
2
1=0.6
1=0.3
Not domestic and possible bait in stream as overflown
Waikato
6/12
1
0.2
water supply
Southland
8/14
2
1=0.1
1=0.2
Not a water supply
Southland
8/14
1
0.2
Not a water supply
Waikato
11/15
1
0.1
Taranaki
12/16
1
0.2
West Coast
12/16
2
1=0.2
1=0.3
Taranaki
12/16
1
0.2
Northland
10/18
1
0.1
Manawatu-Wanganui
11/18
1
0.2
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