Environmental Protection Report

River Looe Catchment River Water Quality Classification 1991

April 1992 W Q P/9 2/001 8 Author: B L Milford Water Quality Planner

NRA National Rivers Authority C V M Davies South West Region Environmental Protection Manager ACXNOHLQKDfBtrS

The Water Quality Planner acknowledges the substantial contributions made by the following staff:

R Broome - Co-ordinator and Editor Freshwater Planning - Production of Naps C McCarthy - Administration and report ccopilation ______A_Gumey---Statistical-Schedule-production------

Thanks are extended to A. Burghes of Moonsoft, Exeter for computer support.

Suggestions for improvements that could be incorporated in the production of the next ^Classification report would-be welcomed.

Further enquiries regarding the content of these reports should be addressed to:

Freshwater Officer, National Rivers Authority, Manley House, Kestrel Way, EXETER, Devon E3C2 7LQ

110245 RIVER WATER QUALITY IN THE RIVER LOGE (M OM ENT

LIST OF OONTBHS Page N o.

1 Introduction 1

2 River Looe Catchment 1

3 National Water Council's River Classification System 2

4 1991 River Water Quality Classification 3

5 Non-compliance with Quality Objectives 3

6 Glossary of Terms 4

7 References 4

8 Appendices:

8.1 River Quality Objectives including Monitoring points - map format

8.2 Basic Determinand Analytical Suite

8.3 National Water Council (NWC) River Classification System

8.4 NWC Criteria for Non-Metallic Determinands - Regional V a r i a t i o n

8.4.1 NWC Criteria for Metallic Determinands - Regional V a r i a t i o n

8.5 1991 River Water Quality Classification - tabular format

8.6 1991 River Water Quality Classification - map format

8.7 Calculated Determinand Statistics used for Quality Assessment - tabular format

8.8 Compliant/Non-Compliant River Reaches - map format

8.9 Number of Samples Results exceeding quality standards - tabular format

8.10 Percentage Exceedance of Determinand Statistics from Quality Standard - tabular format National Rivers Authority South West Region

National Rbmrt Authority Soutfi Wmtt Region River Looe Catchment 1 . INTRODUCTION Monitoring to assess the quality of river waters is undertaken in thirty-four catchments within the region. As part of this monitoring programme samples are collected routinely from selected monitoring points at a pre-determined frequency per year, usually twelve spaced at monthly intervals. Each monitoring point provides data for the water quality of a river reach (in kilometres) upstream of the monitoring point.

------Each-water-sairple-col'lected_from_each_ monitoring point”is analysed for a range of chemical and physical constituents or properties known as determinands. The analytical results for each sample are entered into a computer database called the Water Quality Archive.

Selected data are accessed from the Archive so that the quality of each river reach can be determined based on a River Classification System developed by the National Water Council (NWC), (7.1).

This report presents the river water quality classification for 1991 for monitored river reaches in the River Looe catchment.

2. RIVER LOOE CATCHMENT

- ^The=East-Looe^River-flows^over-a-distance=of=12v8~)arrfroiTf its source to the tidal limit, (Appendix 8.1). Water quality was monitored at seven locations on the main river, at approximately monthly intervals.

The West Looe River flows over a distance of 12.1 km from its source to the tidal limit, (Appendix 8.1). Water Quality was monitored at four locations on the main river at approximately monthly intervals.

Throughout the East Looe catchment one secondary tributary of the East Looe River was sampled at approximately monthly intervals.

Throughout the West Looe catchment two secondary tributaries of the West Looe River were sampled at approximately monthly intervals.

Folperro Stream flows over a distance of 7.0 km from its source to the tidal limit, (Appendix 8.1) and was monitored at one location situated in /the lower reaches_ of the s t r e a m — - — ---- — — —-— - — — ———

2.1 SECONDARY TRIBUTARIES —-— --- -——

The Connon Stream flows over a distance of 5.3 km from its source to the confluence with the West Looe River, (Appendix 8.1) and was monitored at three locations.______

The Coldrinnick Stream flows over a distance of 5 km from its source to the confluence with the West Looe River, (Appendix 8.1) and was monitored at one location situated in the lower reaches of the stream. __ _ ------

1 The Dobwalls Stream flows over a distance of 2.2 km from its source to the confluence with the East Looe River, (Appendix 8.1) and was monitored at one location situated in the lower reaches of the stream.

Each sample was analysed for a minimum number of determinands (Appendix 8.2) plus additional determinands based on local knowledge of the catchment. In addition, at selected sites, certain metal analyses were carried out.

The analytical results from all of these samples have been entered into the Water Quality Archive and can be accessed through the Water Resources Act Register, (7.2).

3. NATIONAL WATER COUNCIL'S RIVER CLASSIFICATION SYSTEM

3.1 River Quality Objectives

In 1978 River Quality Objectives (RQOs) were assigned to all river lengths that were part of the routine monitoring network and to those additional watercourses, which were not part of the routine network, but which received discharges of effluents.

For the majority of watercourses long term objectives were identified based on existing and assumed adequate quality for the long term protection of the watercourse. In a few instances short term objectives were identified but no timetable for the achievement of the associated long term objective was set.

The RQOs currently in use in the River Looe catchment are identified in Appendix 8.1.

3.2 River Quality Classification

River water quality is classified using the National Water Council's (NWC) River Classification System (see Appendix 8.3), which identifies river water quality as being one of five quality classes as shown in Table 1 below:

Table 1 - National Water Council - River Classification System

Class Description

1A Good quality IB Lesser good quality 2 Fair quality 3 Poor quality 4 Bad quality

Using the NWC system, the classification of river water quality is based on the values of certain determinands as arithmetic means or as 95 percentiles (5 percentiles are used for pH and dissolved oxygen) as indicated in Appendices 8.4 and 8.4.1.

2 The quality classification system incorporates some of the European Inland Fisheries Advisory Commission (EIFAC) criteria (Appendix 8.3) recommended for use by the NWC system.

1991 RIVER HATER QUALITY CLASSIFICATION

Analytical data collected from monitoring during 1989, 1990 and 1991 were processed through a computerised river water quality classification programme. This resulted in a quality-class-being assigned to each monitored-river'reach as indicated in Appendix 8.5.

The quality class for 1991 can be compared against the appropriate River Quality Objective and previous annual quality classes (1985-1990) also based on three years combined data, for each river reach in Appendix 8.5.

The river water classification system used to classify each river length is identical to the system used both in 1985 and 1990 for the Department of the Environment's Quinquennial River Quality Surveys. The determinand classification criteria used to determine the^ annual^quality classes" in 1985, subsequent years .and-for 1991 are indicated in Appendices 8.4 and 8.4.1.'

The river qua 1 ity classes^for-^1991= of-nonitored river reaches in the ca tchirtent=are_^shownin map form in Appendix 8.6.

The calculated determinand statistics for pH, temperature, dissolved oxygen, biochemical oxygen demand (BOD), total ammonia, un-ionised ammonia, suspended solids, copper and zinc from which the quality class was determined for each river reach, are indicated in Appendix 8.7.

NON-COMPLIANCE WITH QUALITY OBJECTIVES

Those monitored river reaches within the catchment, which do not comply with their assigned (RQO), are shown in map form in Appendix 8.8.

Appendix 8.9 indicates the number of samples analysed for each determinand over the period 1989 to 1991 and the number of sample results per determinand, which exceed the determinand quality^ standard.--

For J^ose^non-compliant~riverr”reaches in the catchment, the extent_of— exceedance of the calculated determinand..statistic-with^the relevant -. quality standard~(-represented~as~irpercentage), is indicated in Appendix 8 7 1 0 T 6 . GLOSSARY OF TERRS

RIVER REACH A segment of water, upstream from sampling point to the next sampling point.

RIVER LENGTH River distance in kilometres.

RIVER QUALITY OBJECTIVE That NWC class,which protects the most sensitive use of the water.

95 percentiles Maximum limits, which must be met for at least 95% of the time.

5 percentiles Minimum limits, which mast be met for at least 95% of the time.

BIOLOGICAL OXYGEN DEMAND A standard test measuring the microbial (5 day carbonaceous ATU) uptake of oxygen - an estimate of organic pollution.

PH A scale of acid to alkali.

UN-IONISED AMMONIA Fraction of ammonia poisonous to fish, N H 3 .

SUSPENDED SOLIDS Solids removed by filtration or centrifuge under specific conditions.

USER REFERENCE NUMBER Reference number allocated to a sampling point.

INFERRED STRETCH Segment of water, which is not monitored and whose water quality classification is assigned from the monitored reach upstream.

7. REFERENCES

Reference

7.1 National Water Council (1977). River Water Quality: The Next Stage. Review of Discharge Consent Conditions. London.

7.2 Water Resources Act 1991 Section 190.

7.3 Alabaster J. S. and Lloyd R. Water Quality Criteria for Freshwater Fish, 2nd edition, 1982. Butterworths.

4 Looe Catchment Appendix 8 1 River Quality Objectives BASIC DETERMINAND ANALYTICAL SUITE FOR ALL O A SSIFIO ) RIVER SITES

pH as pH Uhits

Conductivity at 20 C as uS/cm

Water temperature (Cel)

Oxygen dissolved % saturation

Oxygen dissolved as mg/1 O

Biochemical oxygen demand (5 day total AHI) as mg/1 O

Total organic carbon as mg/1 C

Nitrogen ammoniacal- as mg/1 N

Ammonia un-ionised as mg/1 N

titrate as mg/1 N

Nitrite as mg/1 N

Suspended solids at 105 C as mg/1

Total hardness as mg/1 CaC03

Chloride as mg/1 Cl

Orthophosphate (total) as mg/1 P

Silicate reactive dissolved as mg/1 Si02

Sulphate (dissolved) as mg/1 S04

Sodium^( total )"as mg/1 Na

'Potassium_(totar)^as~mg/OTK _

Magnesium (total) as mg/1 Mg

- Calcium-(total)-as-mg/lCa ------

Alkalinity as pH 4.5 as mg/1 CaC03 APPENDIX

m e RIVER QUALITY CLASSIFICATION SYSTEM

River Class Quality criteria Reaarks Current potential uses

Class liaiting criteria (95 percentile)

H Good (i) Dissolved oxygen saturation (i) Average BOD probably not (i) Hater of high quality Quality greater than 80V greater than 1.5 ag/1 suitable for potable supply (ii) Biochecical oxygen deaand (ii) Visible evidence of pollution abstractions and for all not greater than 3 ag/1 should be absent abstractions • (iii) Aanonia not greater than (ii) Gaae or other high class 0.4 ag/1 -fisheries (iv) Where the irater is abstracted (iii) High aaenity value for drinking water, it coaplies with requireaents for A2* water (v) Non-toxic to fish in EIFAC terns (or best estimates if EIFAC figures not available)

IB 6ood (i) DO greater than 601 saturation (i) Average BOD probably not Hater of less high quality Qua li t y (ii) BOD not greater than 5 ag/1 greater than 2 ag/1 than Class \K but usable for (iii Apronia not greater than (ii) Average aimonia probably not substantially the saie o.g ag/1 greater than 0.5 ag/1 purposes (iv) Where water is abstracted for (iii) Visible evidence of pollution drinking water, it coaplies with should be absent the requirenents for A2* water (iv) Haters of high quality which (v) Non-toxic to fish in EIFAC terns cannot be placed in Class 1A (or best estiaates if EIFAC because of the high proportion figures not available) of high quality effluent present or because of the effect of physical factors such as canalisation, low gradient or eutrophication (v) Class 1A and Class IB together are essentially the Class 1 of t River Pollution Survey (RPS)

2 Fair (i) DO greater than 401 saturation (i) Average BOD probably not (i) Haters suitable for potable Quality (ii) BOD not greater than 9 ag/1 greater than 5 ig/1 supply after advanced (iii) Where water is abstracted for (ii) Siailar to Class I of RPS treatient drinking water it coiplies with (iii) Hater not showing physical (ii) Supporting reasonably good the requi resents for A3* water signs of pollution other than coarse fisheries (iv) Non-toxic to fish in EIFAC tera& huiic colouration and a little (iii) Moderate aienity value (or best estiaates if EIFAC foaiing below weirs figures not available) 3 Poor (i) DO greater than tox saturation Siiilar to Class 3 of RPS Vaters which are polluted to Quality (ii) Not likely to be anaerobic an extent that fish are ibsen (iii) BOD not greater than 17 ig/1. only sporadically present. This say not apply if there is a Nay be used for low grade high degree of re-aeration industrial abstraction purposes. Considerable potentiahforfurtheruse if cleaned up

4 Bad Waters which are inferior to Siiilar to Class 4 of RPS Veters which ere grossly Quality Class 3 in tens of dissolved polluted and are likely to oxygen and likely to be cause nuisance anaerobic at tins

X DO greater than 101 saturation Insignificant watercourses and ditches not usable, where the objective is sinply to ~~ " prevent nuisance developing

Notes-^{a)= UnderextyeBe"weather“condrt'iofir(eg flood, drought, freeze-up), or when doninated by plant growth, or by aquatic plant . decay, rivers usually in Class 1, 2, and 3 nay have BODs and dissolved oxygen levels, or aimonia content outside the stated levels for those Classes. Hhen this occurs the cause should be stated along with analytical results. (b) The SOD deterninations refer to 5 day carbonaceous BOO (ATU). Aitnonia figures are expressed as NH<. >t (c) In lost instances the cheeical classification given above will be suitable. However, the basis of the classification is restricted to a finite nuitber of cheiical deterainands and there nay be a few cases where the presence of a cheiical substance other than those used in the classification aarkedly reduces the quality of the water. In such cases, the quality classification of the water should be down-graded on the basis of biota actually present, end the reasons stated. (d) EIFAC (European Inland Fisheries Advisory Couiission) liiiits should be expressed as 95 percentile liaits.

* EEC category A2 and A3 requiresents are those specified in the EEC Council directive of 16 June 1975 concerning the Quality of Surface later intended for Abstraction of Drinking later in the Heiber State.

** ABRonia Conversion Factors

- --- - — (ig-NHr/i tO ig^/V) ~ "

ClaSS_1 A-— ^0.4-B9^XHi7-1-:-Or31-Bg"N/l ClassJB -0.9 ig NHf/1 = 0.70 «g N/i 0.5 ig NHi/1 = 0.39 ig N/l APPENDIX 8 .4

NWC RIVER CLASSIFICATION SYSTEX

CRITERIA USED BY NATIONAL RIVERS AUTHORITY - SOOTH NEST REGION FOR NON- HETALLIC DETERMINANDS

River Quality Criteria C l a s s

1A Dissolved oxygen % saturation greater than 80% BOD (ATU) not greater than 3 mg/1 O Total ammonia not greater than 0.31 mg/1 N Non-ionised ammonia not greater than 0.021 mg/1 N Temperature not greater than 21.5 C pH greater than 5.0 and less than 9.0 Suspended solids not greater than 25 mg/1

IB Dissolved oxygen % saturation greater than 60% BOD (ATU) not greater than 5 mg/1 O Total ammonia not greater than 0.70 mg/1 N Non-ionised ammonia not greater than 0.021 mg/1 N Temperature not greater than 21.5 C pH greater than 5.0 and less than 9.0 Suspended solids not greater than 25 mg/1

2 Dissolved oxygen & saturation greater than 40% BOD (ATU) not greater than 9 mg/1 O Total ammonia not greater than 1.56 mg/1 N Non-ionised ammonia not greater than 0.021 mg/1 N Temperature not greater than 28 C pH greater than 5.0 and less than 9.0 Suspended solids not greater than 25 mg/1

3 Dissolved oxygen % saturation greater than 10% BOD (ATU) not greater than 17 mg/1 O

4 Dissolved oxygen % saturation not greater than 10% BOD (ATU) greater than 17 mg/1 O

STATISTICS USED BY NATIONAL RIVBtS AUTHORITY - SOUTH NEST REGION

Determinand Statistic

Dissolved oxygen 5 percentile BOD (ATU) 95 percentile Total ammonia 95 percentile Non-ionised ammonia 95 percentile Temperature 95 percentile PH 5 percentile 95 percentile Suspended solids arithmetic mean APPENDIX 8 .4 .1

NWC RIVER CLASSIFICATION SYSTHt

CRITERIA USED BY NATIONAL RIVBtS AUTHORITY - SOUTH WEST REGION FOR METALLIC DETERMINANDS

Total Hardness (mean) Statistic Soluble Copper* mg/1 CaC03 ug/1 C u Class 1 Class 2

0-10 95 percentile < • 5 > 5 10 - 50 95 percentile < - 22 > 22 50 - 100 95 percentile < • 40 > 40 100 - 300 95 percentile < - 112 > 112

* Total copper is used for._classification^until- sufficient^data~on"sbluble ~ -"coppercetfTbe obtained.

T O T A L ZINC

Total Hardness (mean) Statistic Total Zinc mg/1 CaC03 ug/1 Zn Class 1 Class 2 Class 3

0-10 95 percentile < - 30 < - 300 > 300 10 - 50 95 percentile < - 200 < - 700 > 700 50 - 100 95 percentile < - 300 < - 1000 > 1000 100 - 300 95 percentile < - 500 < - 2000 > 2000 NATIONAL RIVERS AUTHORITY - SOUTH WEST REGION 1991 RIVER HATER QUALITY CLASSIFICATION CATCHMENT: LOOE

| U s e r Na t i o n a l | Re a c h |Distance Ri v e r 84 86 87 88 8 9 ~ ] 90 91 | 1991 H a p River Reach upstreaa of |Reference G r i d | L e n g t h | fro * Q u a l i t y NWC NWC NWC NMC n w c H t C I M ] | P o s i t i o n | N u m b e r Reference | (kn) | source O b j e c t i v e C l a s s Class Cl a s s C l a s s Cl a s s C l a s s Class| Number I (kn>.

2.9 | 2.9 IB 2 2 1b IB 2 2 2 i EAST LOOE RIVER VENTON VEOR BRIDGE | R 1 4 B 0 0 5 SX 2304 6577| | R14B001 SX 2323 6456] 1.0 1 3.9 IB 2 2 IB 2 2 3 LA | EAST LOOE RIVER LO O E M I L L S 1.5 IB 2 IB 2 2 2 2 IB j EAST LOOE RIVER LAMELLION MILL | R14B002 SX 2388 6359( 1 5.4 SX 2422 6280| 0.9 | 6.3 IB 2 3 2 2 2 N LB | EAST LOOE RIVER BELOW LISKEARD STW | R 1 4 B 0 0 8 SX 2455 6200j 0.9 j 7.2 IB 2 3 2 2 2 2 IB | EAST LOOE RIVER TRUSSEL BRIDGE | R 1 4 B 0 0 3 18 2 3 IB 2 2 2 I B | EAST LOOE RIVER lANDLOOE BRIDGE | R 1 4 B 0 0 6 SX 2500 5950| 3.0 ) 10.2 2.6 | 12.8 IB 2 3 2 IB IB IB IB | EAST LOOE RIVER RAILWAY HALT SANDPLMX | R 1 4 B 0 0 4 SX 2483 5715| IB Ib | DOBWALLS STREAM TUELHENNA BRIDGE | R 1 4 B 0 0 7 SX 225 651 | 1.4 1 1-4 IB 3 LB 1 DOBMALLS STREAM EAST LOOE CONFLUENCE (INTERRED STRETCH) 0.7 I 2.2

2.0 | 2.0 1b IB IB J J 3 3 3 | 9 WEST LOOE RIVER BOSENT BRIDGE j R 1 4 C 0 1 Q SX 2128 634^| IB IB IB 3 3 3 2 2 j WEST LOOE RIVER SCUffi MILL BRIDGE | R 1 4 C 0 0 1 SX 2158 6213| 1.5 1 3 -5 10 | 7.8 IB IB IB IB IB IB 2 WEST LOOE RIVER CHURCHBRIDGE | R 1 4 C 0 0 2 SX 2193 5858| 4.3 2 1 11 IB IB 3 2 IB 2 2 WEST LOOE RIVER SOWDEN'S BRIDGE | R 1 4 C 0 0 3 SX 2302 5556| 3.7 | 11 . 5 12 IB IB 3 2 IB 2 2 2 j WEST LOOE RIVER NORMAL TIDAL LIMIT (INFERRED STRETCH) 0.6 | 12.1 I B 2 IB 2 IB I B 1 TX COUJRINNICK STREAM TREGARRICK MILL BRIDGE | R 1 4 c 0 l i SX 2058 5^l3| 3.2 1 3.2 is LB j COLDRINNICK STREAM WEST LOOE CONFLUENCE (INTERRED STRETCH) 1.8 | 5.0 IB IB 2 IB 2 IB j — " 3 i 1 CONNOR STREAM ABOVE HASTE DISPOSAL SITE | R 1 4 C 0 0 5 SX 1880 6259| i.i t * 1b IB 1 4 TT | R 1 4 C 0 0 6 SX 1962 6178| 1.4 IB I B 2 2 2 2 3 3 | 15 CONDON STREAM TREVILLIS WOOD I 2.7 2.5 IB IB 2 2 IB . IB IB 2 j 16 COfW ON STREAM HERODSFOOT BRIDGE | R 1 4 C 0 0 8 SX 2140 6042| 1 5-2 2 IB IB IB CONNOR STREAM WEST LOOE CONFLUENCE (INTERRED STRETCH) 0.1 | 5.3 IB LB 2 2 1

| "?77 is IB IB i 1 2 | IT P O L P E R R O RIVER POLPERRO | R 1 4 A 0 0 1 S X 2068 5097| 6.7 | 7.0 IB IB IB 2 2 2 | POLPERR0 RIVER NORMAL TIDAL LIMIT (INFERRED STRETffl) 0.3

S D Q. X 00 U» Looe Catchment Appendix 8.6 Water Quality -1991 mmrat* rivers juhcruy - saum wsr m an 1991 RIVER W ®R QLNHY GLASSmaOlEN j carai/mp mntrowp amnsncs ieb? k r qw irr jesEsaon1 CMQMENT: ICCE ! I

[Riuar |Itoach tpstrwn cl Itesr ,BQO QilniLrtad MMsanand Statistics usad for QaUty Msc&soent I 1 ftrf. II 'I I I Itafear [H Lowr (M l&wr | itapwatuxv | DO (%) BOD (JtTU) flbtal A a n U ( U d m . Mtsnia S-Snlirtt Tbfcal O r p w Total Zinc Q a s j 5%il» Class 95%ila j Class 95%il» I Gass 5%U« Gass 9SUI» | Class 95U1# I Class S6U1* Class G a s a 9 & H * O a n 95UI*

|E*ST IBGE RIVES {VDOCN VEER tVUXX | |H14B005| IB 1 1A 1A 7.8 1A 16.7 | 1A 85.0 1A" ” 2 3 “ IB 0.368 | 1A 0.010 1a fiX i s z m ’ J 34QL4 | lEAST LOCE RIVER jlCCE Mills 1 |H1480Q1| IB 1 I* 7.2 1A 7.7 1A lfi.O | 1A 81.4 1A 2.4 1A 0.105 | 1A 0.010 1A 10.7 1A 8.0 1A 32.0 | |DCT ta x RTVtR |i/rcuE N mu> | )R14B002| IB 1 1A 7.1 1A 7.8 1A 17.4 | IB 72.6 IB 3.4 1A 0.125 | 1A 0.010 1A 14.7 1A 77.6 1A 43.5 | |EMT LOCE rovnt |HI£W U5TOW) SB# (R14B008I IB 1 1A 7.2 1A 7.5 1A 15.1 | 1A 86.0 1A 2.8 IB 0.579 | 1A 0.010 1A 15.2 1A 29.0 1A 36.0 ( [E3OT DXE RIVER riRJESEL BBIPZ 1 |R14B003| IB 1 1A 7.2 1A 7.7 1A 16.4 | IB 70.4 IB 3.4 IB 0.621 ( 1A 0.010 1A 13.7 1A 14.9 1A T7.0 | (EAST l£EE RIVER iLwmxE huge | |R14B006| IB 1 1A 7.3 1A 7.9 lA 16.2 | IB 78.0 1A 2.5 1A 0.188 | 1A 0.010 1A 11.7 1A 15.6 1A 2B.2 | (EAST IDCE RIVER n«n>Kr h n i s t a v e s |RU0OO4| IB 1 1A 7.3 1A 8.0 1A 16.5 | 1A 81.3 IB 3.1 1A o.rra | 1A 0.010 1A 10.9 1A 7.2 1A 36.0 | 1 1 1 1 1 1 1 il 1 ‘ Idobmis s o o n jTimfWA BUDGE | |R14B007| IB 1 1A j- 6.6 IA i . i 1A tf.3 | IB 66.2 1A 2.0 1A 0.166 | 1A 0.010 1A 14.0 1A m~T .i 1a | I 1 1 1 11 II 1 (v*sr WOE RIVER \ « B o n aaoaE IR14CD10| IB t 1A i T .i 1A IS 1A 15.0 | IB 67.0 2 6.J i 2.066 | 1A d.oid” i 1A i4.6 1A 54.6 | fV*ST UXE RIVER |SOW» MILL ERinzl PU4CD01I IB. 1 1A 7.1 1A 8.1 1A 15.6 | 1A 81.8 2 5.2 ! 2 0.910 | 1A 0.010 1A 16.0 1A U.8 1A 32.7 | |xsr uxc Rival la u a o n n s , |?14G002| IB t 1A 7.1 1A 7.9 1A 15.4 | 1A 83.6 2 5.1 IB 0.685 | 1A 0.010 1A 19.9 1A 17.2 1A 44.6 | {VEST WOE RIVER ISOCETTS m u g |K14GD03| IB 1 1A 1 6.9 1A 7.9 1A 15.3 | IB 78.0 „ : ia 0.264 | 1A 0.010 1A 15.0 2 160.4 1A 431.7 | il 1 1 1 1 1 1 “ l 1 icnnajwrcK snow rmoiwiCK mu, amxc IR14G0UI IB 1 1A ,;U 1A 7.8 1A 15.4 | IB 77.i IB 3.6 1A 0.294 | 1A o.oib 1a 14.6 1a ' 14.6 iA 44.0 | I 1 1 1 1 i i |ai«CN s o o n I^BDUE WVSIE OISB»L SUE |R14000S| IB 1 1A . 6.6 1A 8.0 1A 14.6 | IB * . 5 IB f n j i 2.010 | 1A 6.015 J tt.4 2 156.4 i 407.4 | JOTKN SUCH fn cvn u s vcxx> ! fK14a006| IB j 1A 6.7 1A 7.7 1A 14.2 IB 75.0 2 I 6.8 3 2.030 | 1A 0.010 1A 9.7 1A 11.3 1A 44.2 | la n a i sr o w pCHXbWJUT BRED® 1 [Ri4aooe| IB 1 1A ! 6.8 1A 7.9 1A 15.2 { IB 72.3 IB ] 2 0.721 | 1A 0.010 1A 16.6 1A 12.3 1A 41.6 | 1 1 1 1 1 4*7 1 iRXifHO RIVER [k u t o o i |R14N001| IB 1 1A 1a M 1A ii.B | 1A 80.3 i | i.i Ia fl.iis | Ia d.010 Ia U.7 1A 8.0 Ia 1 31.9 |

II ii1 i ii pedx 8.7 Appendix

! II Looe Catchment Appendix 8 8 Compliance • 1991 mnCTOL RIVQS WDDRBtY - SCDIH XST BHam I I 1991 r i v e r want qgurr aftsg n omEN 1 lU ffil CP SttfU S (R) JW fVEER CF SWCU3S BCEtlHMJ Q\MXTZ SOftXD (P) |. OaOMOT: LCCE I I |!

| R i w |naach ifstraan aC 1 *■? 1 Eft Ic m b t EHlftar | 'ftrperaturB DO (%) BCD uav) flbtal femrda fllikn. feudal S.SnUffc | Tbtai Ittal Zinc | 1 1 | ft*. ;i 1 1 1 1 1 | n u b *1 N r N r 1 N P 17 P 17 P 1 H r P | n P P N '[ 1 N f N * 1 1 1 I h1 1 1 1 1 1 ’ 1 1 ■t 1 1 1 1 , i 1 |i 1 1 1 ! 1 1 1 li _ t |t3CT U X E RIVER IVENICN VEER U U C Z (R1400051 331 - 33 - 1 33 - 33 - 33 - I h - 1 26 h 2 1 2i i 2i i | \UST U X E RTVQl |IOX MULS | IK14B001 ( 33 - 33 - 1 33 - 33 - 33 - 1 33 - 1 32 - | 33 4 1 19 - 19 - 1 (EAST U E E KIVB* [KL4B002| 32 - 32 - 1 32 - 31 - 32 - 1 32 - 1 30 - | 32 3 1 20 - 20 - | |EAST U X E RIVER |BX£W USFUTO SB# |R14BD0e| 13 13 - 1 13 - 13 - 13 - 1 13 - 1 13 • | 13 2 1 13 - 13 - | |Bvsr l a x r i v e r f m E s a ^ w n x E 1 |RlfflX)3| 33 - 33 - 1 30 - 30 - 33 - 1 33 l | 28 - | 33 2 1 21 - 21 - 1 |E3CT l a x RIVER M i x c c e B m x c |Rl4B006| 34 - 34 - 1 32 - 31 - 34 - l| 34 - 1 32 • | 34 2 1 23 - 23 - I (OCT UXE RIVER jranrcr w i t s m u a |R14B004| 33 33 “ 1 32 — 32 32 — 1 33 — 1 31 23 3 t 31 - 31 - I 1 1 ! 1 1 1 !l 1 1 |DCB*IXS SUEPM IHJEUtTNV HODGE |R14B007| 23 1 “ 23 ■“ 1 22 — 22 “ 23 |i 23 “ 1 20 23 S 1 22 — 22 — | 1 1 1 ll 1! 1 |VEST ICCE RIVER (BOSHT SCQXE | |R14CD10| 32 i 32 - 1 31 - 31 - 32 i 1 32 5 1 3l *2 1 i? - 12 - | |vesr w o e rivtr j s o w m i l n a n s |KL4a»l| 32 - 32 - 1 31 - 31 - 32 l 1, 32 3 1 28 - | 32 !< t 20 - 20 - | pcsr icce r i v e r jaUOTOEGB 1 ' |R14C0Q2| 33 - 33 - 1 31 - 31 - 33 l 1 33 1 1 29 - | 33 4 1 21 - 21 - 1 (VEST U X E RIVER |3!WXN'S UUnZi |R140003| 35 35 ~ 1 33 ~ 34 — 35 l 1 35 — 1 30 35 1 33 l 33 l | 1 1 1 It I K 1 I" la H R D N T C K s t o w (Trawroac m i l b u e b b |R14CD11| 32 32 — 1 32 ~ 32 ~ 32 - 1 32 — 1 ^ ii i 1 ^ *• ii “ I 1 1 1 ■ Il li l‘ 1 1 | a m » S 3 H 7 M I^TOVE V931E DESKEW. SHE [R14G0G5| 33 t 33 - 1 34 - 34 - 3i i 1 i3 i \ 29 - | i i 33 i ii 1 | | a w t w s b e m fTRVHUS VOCD j |R1409061 33 33 - 1 31 - 31 - 32 2 1 33 t 1 28 - | 33 2 1 22 - 22 - | janat snow [HXXEKQT BRSXS |R14aXS| 33 33 ■* 1 33 — 33 — 33 ■* 1 33 l 1 33 33 2 1 21 21 •* | 1 1 ! 1 ll I' ” ll | 1 I |ICtHrro RIVER |PCtHJTO ! 1 |KL4MXH| 33 33 — 1 33 — i s 2 I! 33 ~ 1 » SJ “T' 1 21 — 21 “ 1 1 1 1 f ll II 1 1 1 1 1 RATIONAL RIVERS AUTHORITY - SOUTH WEST REGION 1991 RIVER VOTER QUALITY CLASSIFICATION PERCENTAGE EXCEEDENCE OF DETERMINAND STATISTICS PROM QUALITY STANDARDS CATCHMENT: LOOE

|River |Roach upstream of I Usee | PERCENTAGE EXCEEDENCE OF STATISTIC FROM QUALITY STANDARD I I | Ref. | i I I I I 1 I I | Number| p H Lower | p H U p p e r |Temperature| DO (%) | BOD (ATU)| Total U b - i o n i s e d Suspended j T o t a l j T o t a l | I I I I I j j | | Ammonia A m o n i a S o l i d s j C o p p e r | S i n e j I I I I I lilt 1 I I I I I I I I I 1 I I I I I I I I I |EAST LOOE RIVER (VENTON VEOR BRIDGE ]R14B005| - | I ~ I - | -- {"{ ii 1 |EAST LOOE RIVER |LOOE MILLS |R14B001| - j I ~ I - | - - J 1 - | | EAST LOOE RIVER (LAMELLION MILL |R14B002| - | I - I - | - - | J | | EAST LOOE RIVER | BELOW LISKEARD STW |R14BOOS| - j I - I - | -- j | 1 |EAST LOOE RIVER |TRUSSEL BRIDGE |R14B003| - | I ~ I - | - - i | 1 | EAST LOOE RIVER |LANDLOOE BRIDGE |R14B006| - | I - I - | -- j - j - | | EAST LOOE RIVER (RAILWAY HALT SANDPLACE |Rl4B004| — - — — | • I I I I I I I 1 |DOBWALLS STREAM (TUELMENNA BRIDGE [R14B007] “ — —“ ■ | _ | I I I I I I I I 1 (WEST LOOE RIVER |BOSENT BRIDGE (RI4C010| - | I ~ I - 29 | i9*i - 51 | - | | |WEST LOOE RIVER |SCAMN MILL BRIDGE (R14C001| - ( | - | - 3 | 30 - | | | | WEST LOOE RIVER ICHURCHBRIDGE |R14C002| - | I - I - | -- | | 1 | WEST LOOE RIVER jSOWDEN'S BRIDGE |R14C003| “ “ | 43 | ■* | I I I I I I 1 JCOLDRINNICK STREAM ITREGARRICK MILL BRIDGE |R14C011| * “ — | | I I I I I I [CONNON STREAM |ABOVE WASTE DISPOSAL SITE |R14C005| - | - I - I - - I l M - 34 | h i { 36 1 ICONNOn STREAM [TREVTLLIS WOOD |Rl4C006| - I - I - | - 35 | 190 - - | _ 1 . 1 |CONNON STREAM IHEBODSPOOrr BRIDGE |R14C008| — — 3 - - | 1 I I I I \ I I 1 |POLPERRO RIVER |POLPERRO |R14AD01| 35 | — | I I f I I I I " I _ " j 1 pedx 8.10 Appendix