pump stations (all due to high rainfall and power outages during Cyclone Dovi in
February 2022), and a further 14 reticulation overflows (the majority of which were due to high rainfall or
blockages due to fat and/or wet wipes). This total of 23 unauthorised incidents is similar to the previous two
monitoring periods.
During the year, NPDC demonstrated an overall high level of environmental and administrative compliance
and performance with the resource consents related to NPWWTP
consent conditions occurred during the previous monitoring period and again during the
period under review when, following higher than average rainfall the minimum separation distance between
burial sites and the water table was not met in some areas of the Cemetery. An abatement notice (EAC-
24486) was issued on 28 March 2022 and NPDC are currently working with a consultant to improve
drainage at the site to prevent any further breaches of the consent occurring.
For reference, in the 2021-2022
Ordinary Council Agenda May 2024
generally very good. It is noted that the protocol for sampling has changed in the last couple of
years so that samples are collected irrespective of weather or tide, unlike previously where samples were
collected around high tide in fine weather only. Prolonged and/or heavy rainfall will often result in high
levels of enterococci in the samples as these are washed down flooded streams and rivers from farmland.
This can be exacerbated by a low tide where a sea sample collected from a site near a
than 0 g/m3 in Pond 1 and 2 8
Figure 3 Daily discharge volumes (m3/day) from the HWWTP and daily rainfall data (mm) from a
Council rainfall station located approximately 5 km east of the site (2021-2022) 12
Figure 4 Location of intertidal survey sites in relation to the outfall 13
Figure 5 Mean number of species per quadrat for summer surveys (1986-2022) 14
Figure 6 Mean Shannon-Weiner Indices per quadrat for summer surveys (1986-2022) 14
Figure 7 Location of shoreline water
exceedance rainfall event (AEP) event. The
maximum discharge rate from the pond during large rainfall events is 1,060 L/s as this is dictated by the size
of the outfall pipe (750 mm). However, there is also provision for the pond to overflow via a spillway
structure to a discharge swale (i.e. bypassing the 750 mm discharge pipe).
At the time of the application it was indicated that, as a result of stormwater inputs to the pond, the
discharge rate from the pond to the Mangorei Stream would be
page
Doc. No: 3033222
TARANAKI REGIONAL COUNCIL MONTHLY RAINFALL AND RIVER REPORT FOR March 2022
Provisional Data Only
Note: some sites record a number of parameters
Table 1: Rainfall at 27 sites throughout the region
Station Sub-region
Monthly Year to Date
Records Began Number of rain
days (>0.5mm)
Total Monthly
Rainfall (mm)
% of Monthly
Normal (%)
Total to date
(mm)
% of Normal for
year to date
% of average full
calendar year
Nth
produced water is disposed of by deep well injection.
Stormwater from the production station is collected and discharged at three separate points. The water level
in the firewater pond in the north western corner of the site is maintained by an abstraction from the
Ngaere Stream. Overflow due to rainfall entering this pond is discharged to land and to the Ngaere Stream
to the north of the pond. Stormwater from the process areas is directed to a large API separator system to
the north east of
page
Doc. No: 2955756
TARANAKI REGIONAL COUNCIL MONTHLY RAINFALL AND RIVER REPORT FOR December 2021
Provisional Data Only
Note: some sites record a number of parameters
Table 1: Rainfall at 27 sites throughout the region
Station Sub-region
Monthly Year to Date
Records Began Number of rain
days (>0.5mm)
Total Monthly
Rainfall (mm)
% of Monthly
Normal (%)
Maximum December
RF (year occurred)
(mm)
Total to date (mm)
% of Normal for year
to