The Biological Monitoring Working Party Score system is a method of assessing water quality using the families of insects and other aquatic invertebrates present. This scoring system is only relevant in the UK.
If this is selected you will be presented with a window offering a choice of BMWP score systems

Original BMWP
Revised BMWP
Habitat Specific - Riffles
Habitat Specific - Riffles and Pools
Habitat Specific - Pools
To use this method you must give the program observation data arranged as samples by family. It is important that you spell the family names correctly because the program scans your list of names and scores those that correspond with a standard list.
Pisces has developed software to automate this process, see T-group.
If your names do not correspond with those in the list, you will see a message similar to this, indicating that corrections must be made.

The data file bmwp.scr must be in the same directory as the data to be analysed. The bmwp.scr file is a text file containing the names and their associated scores.
The standard list is as follows:
Siphlonuridae
Heptageniidae
Leptophlebiidae
Ephemerellidae
Potamanthidae
Ephemeridae
Taeniopterygidae
Leuctridae
Capniidae
Perlodidae
Perlidae
Chloroperlidae
Aphelocheiridae
Phryganeidae
Molannidae
Beraeidae
Odontoceridae
Leptoceridae
Goeridae
Lepidostomatidae
Brachycentridae
Sericostomatidae
Astacidae
Lestidae
Agriidae
Gomphidae
Cordulegasteridae
Aeshnidae
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10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
10
8
8
8
8
8
8
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Corduliidae
Libellulidae
Psychomyiidae
Philopotamidae
Caenidae
Nemouridae
Rhyacophilidae
Polycentropodidae
Limnephilidae
Neritidae
Viviparidae
Ancylidae
Hydroptilidae
Unionidae
Corophiidae
Gammaridae
Platycnemididae
Coenagriidae
Mesoveliidae
Hydrometridae
Gerridae
Nepidae
Naucoridae
Notonectidae
Pleidae
Corixidae
Haliplidae
Hygrobiidae
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8
8
8
8
7
7
7
7
7
6
6
6
6
6
6
6
6
6
5
5
5
5
5
5
5
5
5
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Dytiscidae
Gyrinidae
Hydrophilidae
Clambidae
Helodidae
Dryopidea
Elminthidae
Chrysomelidae
Curculionidae
Hydropsychidae
Tipulidae
Simuliidae
Planariidae
Dendrocoelidae
Baetidae
Sialidae
Piscicolidae
Valvatidae
Hydrobiidae
Lymnaeidae
Physidae
Planorbidae
Sphaeriidae
Glossiphoniidae
Hirudidae
Erpobdellidae
Asellidae
Chironomidae
Oligochaeta
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5
5
5
5
5
5
5
5
5
5
5
5
5
5
4
4
4
3
3
3
3
3
3
3
3
3
3
2
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