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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.

Māngere Lagoon Rock Wall, Manukau Harbour

9 April 2025

Sustainable Coastlines

Neria Brewerton

Overview

A

3

2.0

0.6

50m x 4m

Rock Rubble

Items per 1,000m2

670

Products

134

1196

Type Count Weight (g)
Plastic 77 176
Resin pellets A N/A
Bottles <= 2 L 2 71
Food wrappers 3 5
Bottle caps & lids 6 19
Toys, sport, & recreation (Plastic) 1 19
Straws 1 2
Bottle seals & tabs 4 4
Unidentifiable hard plastic fragments 52 42
Cable ties & zip ties 4 5
Unidentifiable soft plastic fragments 4 9
Foamed Plastic 28 22
Polystyrene insulation or packaging 18 12
Polystyrene cups or food packs 10 10
Glass & Ceramic 19 236
Construction material 1 187
Glass or ceramic fragments 18 49
Fabric & Textiles 5 403
Clothing, towels and linen 5 403
Metal 3 13
Other cans (<= 4 L) 1 7
Metal Bottle caps, lids & pull tabs 2 6
Wood 1 336
Processed timber & pallet crates 1 336
Paper & Cardboard 1 10
Cups, food trays & wrappers 1 10

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

Previous survey in this area

Māngere Lagoon Rock Wall, Manukau Harbour Sustainable Coastlines
10 Feb, 2025
Items per 1,000m2
145
34%