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This site is not included in our monthly water testing programme as we take a sample further upstream at Plumpton Lane .We are however closely monitoring
this section of the stream for any adverse effects caused by any discharge from from the reworking of the sandpits in Plumpton Lane. As well as these BMWP samples we are also carrying out regular turbidity tests.
See the latest water quality test results for this location...
October 2008
A satisfactory result, despite a recent chemical test showing high ammonia.
| Location |
Plumpton Mill Stream – Ferrings Bridge, Plumpton. |
| Date |
7th October 2008 |
| Grid Reference |
TQ368153 |
| Notes |
Strong flow, moderate turbidity. Riffle over gravel/clay substrate, moderate shading. |
| Also netted in this sample. |
1 bullhead, several water mites and dipteran larvae, empty planorbis shell. |
| Biological quality rating |
B. Good biological quality |
| Water quality rating |
Very good |
| Species |
Group |
BMWP Score |
| Ephemeridae |
Mayfly larvae |
10 |
| Leptophlebiidae |
Mayfly larvae |
10 |
|
Sericostomatidae |
Cased caddis |
10 |
| Odontoceridae |
Cased caddis |
10 |
| Goeridae |
Cased caddis |
10 |
| Rhyacophilidae |
Caseless caddis |
7 |
| Gammaridae |
Shrimp |
6 |
| Ancylidae |
Limpet |
6 |
| Elminthidae |
Riffle beetle |
5 |
| Helodidae |
Water beetle |
5 |
| Simuliidae |
Black fly larva |
5 |
| Tipulidae |
Cranefly
larvae |
5 |
| Hydropsychidae |
Caseless caddis |
5 |
| Planariidae |
Flatworms |
5 |
| Dendrocoelidae |
Flatworms |
5 |
| Baetidae |
Mayfly larva |
4 |
| Glossiphoniidae |
Leech |
3 |
| Asellidae |
Hoglouse |
3 |
| Sphaeriidae |
Pea mussel |
3 |
| Lymnaedae |
Snail |
3 |
| Hydrobiidae |
Snail |
3 |
| Chironomidae |
Midge larvae |
2 |
| Oligochaetae |
Worms |
1 |
| Total Score |
126 |
| ASPT (Average Score Per Taxon) |
5.48 |
October 2007
A sample from this site in May had a BMWP score of 120 and a similar ASPT. The difference may be a seasonal one as several of the specimens were very small and immature.
| Location |
Plumpton Mill Stream – Ferrings Bridge, Plumpton. |
| Date |
1st October 2007 |
| Grid Reference |
TQ368153 |
| Notes |
Three minute kick sample in good flow. Part stony riffles, part silted deeper pools. Moderate tree cover. |
| Also netted in this sample. |
- |
| Biological quality rating |
C. Fair biological quality |
| Water quality rating |
Very good |
| Species |
Group |
BMWP Score |
| Ephemeridae |
Mayfly larva |
10 |
| Sericostomatidae |
Caddis Fly |
10 |
| Calopterygidae |
Damselfly nymph |
8 |
| Limnephilidae |
Caddis larvae |
7 |
| Gammaridae |
Shrimp |
6 |
| Hydropsychidae |
Caddis Fly |
5 |
| Elminthidae |
Riffle beetle
larvae |
5 |
| Simuliidae |
Black fly larva |
5 |
| Tipulidae |
Cranefly |
5 |
| Sialidae |
Alderfly |
4 |
| Baetidae |
Mayfly larva |
4 |
| Glossiphoniidae |
Leech |
3 |
| Sphaeriidae |
Pea mussel |
3 |
| Hydrobiidae |
Snail |
3 |
| Total Score |
78 |
| ASPT (Average Score Per Taxon) |
5.6 |
May 2007
A wide variety of organisms were captured with the BMWP score indicating good biological quality.
| Location |
Plumpton Mill Stream – Ferrings Bridge, Plumpton. |
| Date |
21st May 2007 |
| Grid Reference |
TQ368153 |
| Notes |
Three minute kick sample in moderate flow. Part stony riffles, part silted deeper pools. Moderate tree cover. |
| Also netted in this sample. |
1 Bullhead
3 Water Crickets |
| Biological quality rating |
B. Good biological quality |
| Water quality rating |
Very good |
| Species |
Group |
BMWP Score |
| Ephemerellidae |
Mayfly larva |
10 |
| Ephemeridae |
Mayfly larva |
10 |
| Leptophelbiidae |
Mayfly larva |
10 |
| Leptoceridae |
Cased caddis |
10 |
| Brachycentridae |
Caddis fly |
10 |
| Calopterygidae |
Damselfly nymph |
8 |
| Limnephilidae |
Caddis larvae, cased |
7 |
| Gammaridae |
Shrimp |
6 |
| Platycnemididae |
White-legged Damselfly nymph |
6 |
| Elminthidae |
Riffle beetle |
5 |
| Simuliidae |
Black fly larva |
5 |
| Notonectidae |
Water Boatman |
5 |
| Planariidae |
Flatworrm |
5 |
| Sialidae |
Alderfly |
4 |
| Piscicolidae |
Fish leech |
4 |
| Baetidae |
Mayfly larva |
4 |
| Glossiphoniidae |
Leech |
3 |
| Planorbidae |
Snail |
3 |
| Sphaeriidae |
Pea mussel |
3 |
| Hydrobiidae |
Snail |
3 |
| Oligochaetae |
Worm (Tubifex) |
1 |
| Total Score |
122 |
| ASPT (Average Score Per Taxon) |
5.8 |
August 2006
In anticipation of the proposed discharge to a tributary of the Plumpton Mill stream from the reworking of the sandpits in Plumpton Lane, a baseline chemical/biotic survey was undertaken. The results are shown below.
| Location |
Plumpton Mill Stream – Ferrings Bridge, Plumpton. |
| Date |
25th August 2006 |
| Grid Reference |
TQ368153 |
| Notes |
Three minute kick sample
in good flow. Light shade. Gravel substrate. Water clear |
| Also netted in this sample. |
1 Bullhead |
| Biological quality rating |
C. Fair biological quality |
| Water quality rating |
Good |
| Species |
Group |
BMWP Score |
| Ephemerellidae |
Mayfly larva (E.ignata) |
10 |
| Sericostomatidae |
Caddis fly larva, cased. (S.personatum) |
10 |
| Agriidae |
Damselfly nymph
(Calopteryx splendens) |
8 |
| Limnephilidae |
Caddis larvae, cased |
7 |
| Gammaridae |
Shrimp |
6 |
| Elminthidae |
Riffle beetle |
5 |
| Simuliidae |
Black fly larva |
5 |
| Dytiscidae |
Diving beetle larva
(D.Marginalis) |
5 |
| Glossiphoniidae |
Leech
(Glossiphonia complanata) |
3 |
| Erpobdellidae |
Leech
(E. octoculata) |
3 |
| Sphaeriidae |
Pea mussel |
3 |
| Hydrobiidae |
Snails
( Bithynia ) |
3 |
| Chironomidae |
Midge larva |
2 |
| Oligochaetae |
Worm
(Tubifex) |
1 |
| Total Score |
71 |
| ASPT (Average Score
Per Taxon) |
5.1 |
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