category of
mesotrophic to possibly mildly eutrophic (mildly nutrient enriched). However, taking into
page
account the influence of suspended sediment in this reservoir, and the moderately low
chlorophyll levels, the classification is more appropriately mesotrophic. Previous trending of
this water quality data over time found a very slow rate of increase in trophic level. An update
of the trend report (for the period 1990-2014) has confirmed this very slow, insignificant rate
Plymouth has increased, with housing affordability decreasing, this is at a lower
rate than the national average.
Figure 4.6: Housing Affordability Index comparison against others
New Plymouth has a lower housing affordability index than the national average. The New Plymouth
HAI is 6.15 which is less than the New Zealand HAI of 7.85 and significantly less than Auckland which
is 9.02. The HAI for South Taranaki is lower than New Plymouth and Stratford which increased in 2021
to 6.15
the
region’s resources.
Evaluation of environmental and administrative performance
Besides discussing the various details of the performance and extent of compliance by STDC, this report
also assigns them a rating for their environmental and administrative performance during the period under
review.
Environmental performance is concerned with actual or likely effects on the receiving environment from the
activities during the monitoring year. Administrative performance is concerned
Executive Audit and Risk Agenda September 2023 v2
used in the composting process versus
the volume of drilling muds received onsite i.e. the rate at which this material is used
in the composting process compared to the amount received, and what any excess
material is used for.
All drilling muds received on site used in composting process-see AEE section 3.3.5
3. Waste water irrigation system
Hydraulic loading of the soil
Rate and depth - (soil infiltration rate and soil water holding capacity).
Refer to Appendix F -
responsible resource utilisation, to move closer to achieving sustainable development of the
region’s resources.
1.1.4 Evaluation of environmental performance
Besides discussing the various details of the performance and extent of compliance by the consent holders,
this report also assigns a rating as to each Company’s environmental and administrative performance during
the period under review. The rating categories are high, good, improvement required and poor for both
environmental and
abstraction
rate, effluent flow rate and composition, receiving water quality, odour at the plant boundaries, effluent
loadings and soil and herbage for irrigation areas. The Council undertakes inspections of the plant site and
irrigation areas. Monitoring includes effluent quality checks and inter-laboratory comparisons, water quality,
air quality and biological monitoring.
The Council’s monitoring programmes for the period under review included four inspections, 52 groundwater
and 22 surface
on the stream for the continuous measurement of flow rate and temperature.
Silver Fern Farms Ltd (meat processing plant) demonstrated an overall high level of environmental
performance.
Silver Fern Farms Ltd holds six resource consents, to allow it to maintain a dam in and to take water from
the Tawhiti Stream; to discharge to the stream and to land; and to discharge emissions into the air.
During the period under review, there were no incidents reported in relation to activities
Besides discussing the various details of the performance and extent of compliance by the consent holders,
this report also assigns a rating as to each Company’s environmental and administrative performance during
the period under review. The rating categories are high, good, improvement required and poor for both
environmental and administrative performance. The interpretations for these ratings are found in
Appendix II.
For reference, in the 2021-2022 year, consent holders were found to