Data.

This dataset was collected by Citizen Scientists at an official 'Survey Area' as part of the Litter Intelligence long-term litter monitoring programme. The data are freely and openly accessible to anyone. Download the raw data, share this survey, and learn more about the data collection methodology through the links at the bottom of the page.

Litter Survey

beach-icon Beach.

Porirua Harbour - Paremata Bridge

19 July 2025

Friends of Mana Island

Rosemary McCarthy

Overview

C

5

6.3

10.4

30m x 9m

Gravel/Pebble

Items per 1,000m2

3433

Products

927

7013

Type Count Weight (g)
Plastic 618 1012
Resin pellets A N/A
Unidentifiable soft plastic fragments 142 82
Safety & construction related 19 136
Fishing gear 3 6
Rope 17 364
Food wrappers 97 81
Cigarette lighters 1 12
Strapping bands & tape 30 11
Bottle neck rings 3 6
Bottle caps & lids 42 74
Hangers & retail packaging 17 5
Plastic vehicle parts 1 5
Lollipop sticks 19 7
Food containers 8 18
Pens & Stationery 7 8
Cosmetics and medical packaging 2 10
Straws 17 11
Parking tickets & receipts 1 1
Plastic bags 14 29
Clothes pegs 1 4
Bottle seals & tabs 8 2
Toys, sport, & recreation (Plastic) 11 10
Fishing line 10 21
Bottles <= 2 L 1 37
Unidentifiable hard plastic fragments 147 72
Glass & Ceramic 247 630
Light globes/bulbs 1 4
Glass or ceramic fragments 245 625
Other Glass & Ceramic (specify) 1 1
Foamed Plastic 23 3
Polystyrene insulation or packaging 10 1
Foam sponge 1 1
Unidentifiable foamed plastic fragments 12 1
Wood 21 5328
Processed timber & pallet crates 20 5325
Wooden utensils 1 3
Metal 6 9
Foil wrappers 5 5
Metal Bottle caps, lids & pull tabs 1 4
Rubber 5 4
Toys, Sports & Recreation (Rubber) 4 3
Rubber gloves 1 1
Other 3 1
Cotton buds 1 1
Sanitary items 2 N/A
Fabric & Textiles 2 3
Unidentifiable cloth fragments 1 2
Footwear & shoes 1 1
Paper & Cardboard 2 23
Tetrapaks 2 23

Materials

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  • Or share if you think this data would be interesting to others.
  • If you would like to learn how this data was collected. Our Methodology