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

4 April 2026

Friends of Mana Island

Rosemary McCarthy

Overview

B

5

5.8

64.9

30m x 9m

Gravel/Pebble

Items per 1,000m2

3615

Products

976

4489

Type Count Weight (g)
Plastic 766 658
Resin pellets A N/A
Unidentifiable soft plastic fragments 127 74
Bacterial habitat wheels 1 1
Bottle caps & lids 54 52
Safety & construction related 33 98
Toys, sport, & recreation (Plastic) 11 13
Fishing line 13 21
Clothes pegs 12 5
Bottle neck rings 15 8
Cigarette lighters 1 19
Cigarettes, butts & filters 1 1
Unidentifiable hard plastic fragments 236 158
Gloves 2 14
Rope 29 22
Strapping bands & tape 16 15
Food wrappers 137 79
Pens & Stationery 3 9
Hangers & retail packaging 8 7
Plastic utensils 1 2
Bottle seals & tabs 14 3
Lollipop sticks 18 8
Fishing gear 2 4
Plastic bags 12 28
Vapes 5 11
Straws 15 6
Glass & Ceramic 165 1359
Glass or ceramic fragments 160 1356
Other Glass & Ceramic (specify) 5 3
Foamed Plastic 13 6
Polystyrene insulation or packaging 6 3
Foam glazier spacers 1 1
Unidentifiable foamed plastic fragments 6 2
Other 11 2
Sanitary items 4 N/A
Personal care items 1 1
Cotton buds 6 1
Wood 11 2301
Processed timber & pallet crates 10 2299
Wooden utensils 1 2
Metal 6 158
Fishing related 3 2
Other Metal 1 13
Construction material 1 63
Unidentifiable metal fragments 1 80
Rubber 2 3
Construction & Automotive 1 2
Rubber bands 1 1
Fabric & Textiles 2 2
Clothing, towels and linen 1 1
Unidentifiable cloth fragments 1 1

Materials

  • Would you like to analyse the data yourself?
  • 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