Wellington Harbour 1
Wellington Harbour 1 is located on the eastern side of Evans Bay and has very muddy sediments.
The animals living in the seabed are largely small non-native surface deposit feeding shellfish known to be common in muddy and nutrient enriched environments. A type of worm that’s indifferent to mud but sensitive to disturbances is also common at this site.
Monitored site results
This dashboard shows information on the data collected by the regional councils and unitary authorities for the Estuary health scientific indicators, click the tiles for more information:
Estuary stressor
Mud content information
What do the grades mean?
Mud content refers to the amount of fine silt and clay particles (collectively called ‘mud’) that are present in the estuary sandflats. This figure shows (mean) annual mud content measured at the monitoring site. The annual values are assessed against custom, national guidelines that indicate increasingly negative impacts on the macrofaunal community.
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≤3%
Ecology is not negatively impacted.
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3-10%
The diversity of the macrofauna community is slightly reduced.
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10-30%
The diversity of the macrofauna community is reduced and less resilient to disturbance.
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30-60%
The macrofauna community is unbalanced and dominated by a small number of tolerant species.
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>60%
The macrofauna community is degraded.
Zinc information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable
Copper information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable
Lead information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable
Arsenic information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable
Mercury information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable
Cadmium information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable
Chromium information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable
Nickel information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable
Total PAH information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable
Total DDT information
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What do the grades mean?
This figure shows the (mean) annual contaminant concentration measured in the sediments of the monitored site. The annual values are assessed against the ANZG 2018 guidelines by default, and you can choose to view them assessed against several additional, more conservative guidelines. All of the guidelines show how likely it is that the contaminant is having negative ecological impacts. See the Contaminants factsheet for more information.
- Ecological impacts unlikely
- Ecological impacts possible
- Ecological impacts probable