Environmental Protection Report

River Fowey Catchment River Water Quality Classification 1 991

April 1992 WQP/92/0019 Author: B L Milford Water Quality Planner

NRA National Rivers Authority

CVM Davies South West Region Environmental Protection Manager ACKNOWLEDGOmfTS

The Water Quality Planner acknowledges the substantial contributions made by the following staff: R Broome - Co-ordinator and Editor Freshwater Planning - Production of Maps C McCarthy - Administration and report compilation ______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 EX2 7LQ RIVER WATER QUALITY IN THE RIVER FOWEY GKTCHNDfT LIST OF CCNTHWS Page No.

1 Introduction 1

2 River Fowey 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 Variation 8.4.1 NWC Criteria for Metallic Determinands - Regional Variation

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 ie Fwy Catchment FoweyRiver 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-sample-collected_from_each_monitoring point is analysed for a range of chemical and physical constituents or properties known as determinands. Hie 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 Fowey catchment. RIVER FOWEY CA305MHW -'The^River^Fowey^ flows_over,a,distance_of_38.4 km from its source to the tidal limit in the Fowey Estuary, (Appendix 8.1). Water quality was “ monitored at seven locations on the main river. All sites were sampled at approximately monthly intervals.

The River Lerryn, Trebant Water and Pont Pill Stream flow over a distance of 8 km, 8.8 km and 7.4 km respectively from their source to the tidal limit in the Fowey Estuary, (Appendix 8.1) and were all monitored at one location. Monitoring points were located in the lower reaches of these streams. Throughout the Fowey catchment seven secondary tributaries of the River Fowey were monitored at monthly intervals. TVo reservoirs (Colliford Lake and Siblyback Reservoir) were also sampled at monthly intervals.

2.1 SECONDARY TRIBUTARIES The StT Neot River flows over~a distance of 13T9~km from-its--- source to the confluence with the River Fowey, (Appendix 8.1) and"was~monitored-at-two-locations.—------— ------— ------The Northwood Brook flows over a distance of 4.7 km before joining the main River Fowey, (Appendix 8.1) and was monitored ------at-twolocations.------— ______

The Warleggan Stream (12.7 km), Siblyback Stream (4.2 km) and Cardingham Water (9.4 km) were all monitored at one location prior to the confluence with the River Fowey (Appendix 8.1).

1 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 Fowey 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.

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.

2 1991 RIVER WATER QUALITY OASSIFICftTiai 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----- 8t 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 quality classes for 1991 of monitored river reaches in the catchment are shown in map form in Appendix _8.6. ______------The calculated determinand statistics for pH, temperature, dissolved oxygen, biochemical oxygen demand (BOD), total_amroonia,^un-ionised^- ^ ^ r ammon iay^ suspended "so 1 ids,- coppe r 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 sanple results per determinand, which exceed the determinand quality standard. For those non-compliant river reaches in the catchment, the extent of exceedance of the calculated determinand statistic with the relevant quality standard (represented as a percentage), is indicated in Appendix 8 .10. 6 . GLOSSARY OF TERNS

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 must 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.

P« A scale of acid to alkali. UN-IONISED AMMONIA Fraction of ammonia poisonous to fish, NH>.

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 Fowey Catchment Appendix a 1 River Quality Objectives BASIC DETERMINAND ANALYTICAL SUITE FOR ALL OASSIFIED RIVER SITES

pH as pH Units

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 ATU) as mg/1 O

-Total, organic* carbon, as. mg/1 C — . _ _ _ . _ _ __

Nitrogen ammoniacal as mg/1 N Ammonia un-ionised as mg/1 N Nitrate as tag/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_( totalpas-mg/l"Na Potassium (total) as mg/1 K -Magnesium ( total-)- as mg/l-Mg------

Calcium (total) as mg/1 Ca

Alkalinity as pH 4.5 as mg/1 Ca003 APPENDIX

NVC RIVER QUALITY CLASSIFICATION SYSTEM

River Class Quality criteria Reiarks Current potential uses

Class liiiting criteria (95 percentile)

1A Good (i) Dissolved oxygen saturation (i) Average BOD probably not (i) Hater of high quality Quality greater than 80S greater than t.S ag/1 suitable for potable supply (ii) Biocheiical oxygen deiand {ii; Visible evidence of pollution abstractions and for all not greater than 3 >g/l 6hould be absent abstractions (ill) Antonia not greater than (ii) Sane or other high class 0.4 ag/l fisheries (iv) Hhere the water is abstracted (iii) High aienity value for drinking water, it couplies with requirements for A2* water (»] Non-toxic to fish in EIFAC terns (or best estimates if EIFAC figures not available)

IB 6ood (i) DO greater than SOX saturation i) Average BOD probably not Hater of less high quality Quality (ii) BOD not greater than 5 ig/l greater than 2 ig/1 than Class 1A but usable fo (iii) Annonia not greater than ii) Average anionia probably not substantially the saie 0.9 ig/1 greater than 0.5 «g/l purposes (iv) Where water is abstracted for ;iii: Visible evidence of pollution drinking water, it coiplies with should be absent the requiresents for A2* water ! iv) Haters of high quality which (v) Non-toxic to fish in EIFAC tens cannot be placed in Class 1A (or best estiiates 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 Iv) Class 1A and Class IB together are essentially the Class 1 of the River Pollution Survey (RPS)

2 Fair (i) DO greater than 40S 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 2 of RPS treataent drinking water it conplies with (iii) Hater not shoving physical (ii) Supporting reasonably good the requireients for A3* vater signs of pollution other than coarse fisheries (iv) Non-toxic to fish in EIFAC tens huitic colouration and a little (iii) Moderate aienity value (or best estiiates if EIFAC foaiing below weirs figures not available) Poor (i) DO greater then 10X saturation Siiilar to CUss 3 of RPS Waters vhich are polluted to uality (ii) Not likely to be anaerobic an extent that fish are absent (iii) BOD not greater than 17 ig/1. only sporadically present. This say not apply if there is 8 Nay be used for low grade high degree of re-aeration industrial abstraction purposes. Considerable potential for further use if~cteaned~up

Bad Waters which are inferior to Siiilar to Class 4 of RPS Waters which are grossly uality Class 3 in t e n s of dissolved polluted and are likely to oxygen and likely to be cause nuisance anaerobic at tiies

DO greater than 101 saturation Insignificant watercourses and ditches not usable, where the objective is simply to ^prevent nuisance developing otes (a) Under extrene weather conditions (eg flood, drought, Jreezegupl.xOr^when.doninated^plant'growth^orby'aQuatirDlant - - ^^decayf=rivers^umVlnrrClasri72T and 3 lay have BODs and dissolved oxygen levels, or ainonia content outside the stated levels for those Classes. When this occurs the cause should be stated along with analytical results. (b) The BOD deteriorations refer to 5 day carbonaceous BOD (ATU). Anionia figures are expressed as NtU. at (c) In lost instances the cheeical classification given above will be suitable. However, the basis of the classification is restricted to a finite nunber of cheiical deteninands and there lay 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, and the reasons stated. (d) EIFAC (European Inland Fisheries Advisory Conission) lie its should be expressed as 95 percentile liiits.

EEC category A2 and A3 requirelents are those specified in the EEC Council directive of 16 June 1975 concerning the Quality of Surface Water intended for Abstraction of Drinking Water in the Neiber State.

> Antonia Conversion Factors

(ig NHi/1 to ig N/l)

Class 1A 0.4 ig m l) ; 0.31 ig N/l Ciass J B___ 0.9_B3-NHf/-l-=-0.70-flg-N/1 ^ 0.5 ig NHi/l = 0.39 ig N/l APPENDIX 8.4

NWC RIVER CLASSIFICATION SYSTEM

CRITERIA USED BY NATIONAL RIVERS AUTHORITY - SOUTH WEST REGION FOR NON- METALLIC DETHWINANDS

River Quality Criteria Class

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 RIVERS AUTHORITY - SOUIH WEST 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 OASSIFICATIQN SYSTDI

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

SOLUBLE COPPER

Total Hardness (mean) Statistic Soluble Copper* mg/1 CaC03 ug/1 Cu 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_classif icationuntilsuff icient data on soluble c oppe r ^ can-" be~ bb ta i ned.

TOTAL 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 RATIONAL RIVERS AUTHORITY - SOUTH WEST REGION 1991 RIVER HATER QUALITY CLASSIFICATION CATCHMENT: FOWEY

|1991 Nap Rivar [Reach upstream of | User National | jPosition 1 {Reference Grid j j Nuafctr 1 j Number Reference | 1 1 1 1 ! i ■ FOWEY |HARROWBRIDGE | R15B001 SX 2065 74421 | 2 FOWEY |LAMELGATE | R15B024 SX 2230 70841 | 3 FOWEY IDRAYNES BRIDGE | R15B002 SX 2281 6893| | 4 FOWEY ITREVERBYN BRIDGE ) R15B003 SX 2063 6748| 1 5 FOWEY |BODITHIEL BRIDGE | R15BQ04 SX 1763 64861 1 6 FOWEY IRESPRYN BRIDGE | R1SB02S SX 0994 6353| | 7 FOWEY |RESTORMEL | R15BQ06 SX 10S0 6130] FOWEY |NORMAL TIDAL LDHT (INFERRED STRETCH) 1 1 8 PONT PILL |TRETHAKE MILL | R15A003 SX 1555 5310| PONT PILL |NORMAL TIDAL LIMIT (INFERRED STRETCH) 1 1 * TREBANT HATER |EAST TENCREEK | R15A002 SX 1S10 5546j TREBANT HATER |NORMAL TIDAL LIMIT (INFERRED STRETCH) 1 1 i° LERRYN RIVER | LERRYN | R15A004 SX 1433 5733| LERRYN RIVER |NORMAL TIDAL LIMIT (INFERRED STRETCH) 1 I 3i ' CARDINHAM WATER IGLYT3KMILL | R1SB021 SX 1114 6440| 1 1 HARLEGGAN RIVER IPAOTERS BRIDGE | R15B009 SX 1593 6795| HARLEGGAN RIVER )FOWEY CONFLUENCE (INFERRED STRETCH) f ST. NEOT RIVER |INFLOW, COLLIFORD LAKE (UNMDN. STRETCH) 1 13 ST. NEOT RIVER |COLLIFORD LAKE | R15B034 SX 178 711 t 1 1« ST. NEOT RIVER |COLLIFORD BRIDGE | R15B014 SX 1808 7075| 1 13 ST. NEOT RIVER |TWO HATERS FOOT | R15B008 SX 1855 6494| ST. NEOT RIVER |FOWEY CONFLUENCE (INFERRED STRETCH) 1 1 i«> NORTHWOOD BROOK |HORTHA | R15B016 SX 2063 6984| 1 17 NORTHWOOD BROOK |TRENANT BRIDGE | R15B011 SX 2099 6829 ( NOKTHHOOD BROOK |FOWEY CONFLUENCE (INFERRED STRETCH) 1 _ SIBLYBACK STREAM |INFLOW, SIBLYBACK RES. (UIQBN. STRETCH) 1 IB SIBLYBACK STREAM |SIBLYBACK RESERVOIR | R15B033 St 2315 7033| 1 19 SIBLYBACK STREAM |TREKEIVESTEPS BRIDGE | R15B010 SX 2283 6998| SIBLYBACK STREAM |FOWEY CONFLUENCE (INFERRED STRETCH) 1 _ Reach | Distance River 85 86 87 88 89 90 I- 9l'\ Length | fro* Quality NHC m e INC RHC NWC 1MC BMC j (kn) | source Objective class class class Class Class Class Classj I

6.8 1 8.8 is iA 1A 1a 1A 1A 1a IB I 4.2 | 13.0 IB 1A 1A IB IB IB 1A IB j 2.4 | 15.4 IB 1A IB 1A IB IB 1A 1A | 3.4 | 18.8 IB 1A LA 1A IB IB 1A 1A j 5.6 | 24.4 IB 1A IB IBIB 2 1A LA | 9.7 | 34.1 IB 1A 1A 1A 1A LA 1A 1A | 2.9 | 37.0 IB 1A 1A 1A 1A U 1A 1A ) 1.4 | 38.4 IB 1A 1A 1A 1A LA 1A 1A |

s :r “ | " S.S 1b IB 2 IB | IB j 1.9 1 IB IB 2

7.6 | TJ 1b 1b "T" 5 1 1.2 | 8.8 IB IB 2 2 |

i.9 1 ‘J’* IB IB 2 1A | 0.1 | 8.0 IB IB 2 1A |

9.4 t 9.4 1b 1A IB 2 1

9 . it 1 9. a IB 1A 1A 1a iA IB 1a 1a | 2.9 | 12.7 IB 1A 1A 1A 1A IB 1A 1A |

0.9 | 0.4 IB IB 1b 1b IB 1b U U | 4.7 | 5.6 IB IBIB IB IB IB IB IB | 0.3 1 9-9 IB IB IB IBIB IB IB IB | 7.9 | 13.8 IB 1A 1A IB IB IB 1A 1A | 0.1 | 13.9 IB 1A 1A IB IB IB LA 1A |

2.4 I Y.T- 1b IB La 1a 1A 1A 1a " “T3 T | 2.0 1 4.4 IB IB 1A 1A 1A 1A 1A IB | 0.3 1 4.7 IB IB 1A LA 1A 1A LA IB 1

2.0 1 1b 1A 1b 1A IB IBU 0 j 1.4 t 3-4 IB 1A IB 1A IB IB 1A 1A | 8.5 Appendix 0.6 1 4.0 IB 1A IB 1A IB IB IB IB | 0.2 1 4.2 IB 1A IB 1A IB IB IB IB | Fowey Catchment Appendix 8.6 Water Quality -1991 NflllLTW, RIVERS AtUHTtTIY - 9DUIH WST ISGBCN 1591 Rivni v r ie r QUNxre aAssnTCRncn CMflMH) rprnnTTTOD gm m m s lbed KR cjm jiy asses® 1® OOOKNT: KMY !

Riwir jltaadi ifstn n of Uber [RQO Mwiiwri uwd far Qality A&Msaurt Ftaf. ll I Mubsr |HXtt*r T^perature CO (\) BOD (JOU) |Tbtal rtwuiia [Utim. M r a U SJDlidk Tbt&l OfTT ■total Zinc « a Skiim Class 95%il* Class 95%ile C la ss 5 tU * Otea 95%Ue ◦ass 95%U« d M 95%il* (1ms 95*11* (lass 95%U* I til1 1 1 1 1 ll .... 1 ... ..1 1 \______.____ 1A 4.9 1A 6.0 1A 19.5 | K>*X |HH$tWWDGE |R15a)0lj IB i a ; s.i 1A 6.7 1A 14.9 IB 80.0 1A 1.9 1A 0.060 1A 0.010 1A 23.0 j r o o f Iumickde |R15B024| IB 5.7 1A 6.9 1A 14.8 IB 80.0 1A 2.1 1A 0.056 1A 0.010 1A 4.6 1A 8.8 r o o r jnswrs ones |R13002| IB 1A 5.9 1A 7.0 1A 15.6 1A 81.5 1A 2.0 1A 0.050 1A 0.010 1A 3.6 1A 5.6 1A 13.6 j U.O 1A 34.5 | FOEf Iiuvuwn anus |R1SB003| IB j a | 6.2 1A 7.1 1A 15.8 1A 87.3 IA 2.9 1A 0.054 1A 0.010 1A 6.0 1A 6.0 1A 22.8 j r o c r ItiUUI'lHILL sm xz |K15B004l IB 6.3 1A 7.5 1A lfi.l 1A 88.3 1* 2.3 1A 0.077 1A 0.010 1A 6.3 1A 0.077 - - 1A 10.2 1A 10.5 1A 32.5 | towy Ipeston mnxE |E05ED25| IB 1A, 6.5 1A 7.4 1A 15.8 1A 85.6 1A 2.5 ' 1A KWX ItVkfiijfliL [Fl5B006| IB 1A| 6.4 1A 7.5 1A 16.5 1A 88.4 1A 2.8 ; 1A 0.061 1A 0.010 1A 9.9 1A 7.6 1A 36.1 j I______1 1 1 1! 1 FONT PUL I'He i h n s m u . |R 1V 003 Ta---- 7 T 1A 8.1 1A 83.9 IB 1A 1A I______J___ T a I 7 T VSZMirVKIIK | OCT lUUClK |K1SMXX2 IB Ia TT 1A IT 15.6 15 iTT "5T 18 0 3 2 I a otolF i n r r 1A TT I liZTON Rivni |LQTON [R15M 04 IB 6.5 "DT TF "K E T 1a 5To~ "DT T T 1A 0.130 I a oTolo U lb.l 1A IT IT TFT J___ I_____ cNcmwHvrem ICUTMHU, |KL5B0a IB 1A 6.6 1A TT Ta E T I a E T TT I a OftT Ta Ow 1a z l.i t t TT Ta a r J ______{VNUKHt RIVER [Emms ornxs IR15B0Q9 IB 1A 6.3 1A TT is n r 1a 5To 1A 2.9 I a QMS I a O J T Ia il.6 Ia iU u n o * J |ST. HOT RIVER jaXJUHH) IMS 1 |R15n034| IB | 1A "SJ“DT" “ T 5 " 1A 20.5 IB ■te.9 1A TT UT TBT iA" T .oIT Ta TT IT t :r TTTJT |ST. NEDT RIVES laxjUKH) su n s 1 (RL5B014| IB | 1A 5.6 1A 6.9 1A 18.5 IB 72.8 1A 2.6 1A 0.178 1A 0.010 1A 4.2 ia 7.0 1A 22.0 |ST. WDT RIVER [TOO VfQEPS ROOT' |R15B003| IB | 1A 6.1 1A 7.4 1A 17.1 1A 84.4 1A 2.S ia 0.120 1A 0.010 1A 12.4 1A 2D.S 1A 45.9 TIT NCROKZDBCCK [VCKDA |R15B0I6 1A TT n r TT 1A 1ST ia "ST IT Ta" TEST I a (THJT TT 1 5 3 “ 1A “HT T a tUQHaSBRXK fntwwr bo ds (R15B011 1A 6.1 1A 7.3 1A 14.2 1A ei.e 1A 2.4 ! IB 0.350 1A 0.010 1A 16.7 1A 8.9 1A 23.7 "ST SH2BKX SCTfJM IS3ELXBKK IfS J W a m "IKISBOM 1A TT Ta TT 1A T5T U "ST IT T3T 1A w 1A 6.6ix5 I a TT "DT HT IT fDUUVUUlK HUD® |R15BD1D 1A 6.0 1A 7.4 1A 18.0 IB 0 .4 1A 2.41 1A 0.082 1A 0.010 1A 3.9 1A 4.9 1A 43.3 J ___ _ pedx 8.7 Appendix Fowey Catchment Appendix 8.8 Compliance -1991

Compliance

Non compliance

Not monitored

Version 1 /1991

Cardinham Water

ack Res

NRA SOUTH WEST I.

m n o N < rivqs MJiHpnY - soum west te a m 1991 ravni want o v u m oAssmcrfncu ] N J «R CP SNTUS (HI A D NIBR CF SHftfS PttmUNl QXXtt 3 0 * 0 * 0 (P) aanMur: mex 1 I Tbtal Zinc | [Rivsr 1 Reach irstneu of 1 1 Efl lower (fllfter | TOBpetstura DO (%) | b x > ya w |Tt£&Jl Amnia |lhim. Amenta | S.SoLL* | IKal OcffW I 1 1 fef, I I i ii 1 1 1 j Nafa sr| F NF 1 B F H F i r F 1 N F 1 R F 1 H F 1 N F If P | 1 1 ®li I 1 1 1 1 I ii 1 1 1 1 1 1 1 1 1 ;! 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 j 1 ! 1; 1 1 - - - - 46 i - 32 |ry & IHMKOTOKE |R15B001| 46 46 1 45 45 - 1 ,* 1 46 - 1 36 - | 1 32 * 1 |RX5E024| 47 - 47 - - 46 - - - 1 34 - | 47 i 1 34 — 34 “ 1 IKWX |L»OGHEB 1 46 • F 1 47 f m a r inrarcs m u z }H15B002| 49 - 49 - | 49 - 48 - 1 49 - !| 49 — 1 39 — | 49 ** 1 48 — 48 “ | 1 R V O pm/UUai HODGE |R15B003| 45 - 45 - | 44 - 44 - | 45 - !i 45 - 1 33 — | 45 i 1 41 ' ** 41 * 1 |k h x BCDnHEOi EKIXE |R150[)4| 46 - 46 - | 45 - 45 - 1 46 - 1 46 - 1 43 - | 46 l 1 43 43 * | |p»or [I5SHQN tKHIZ |R15B025| 66 - 66 - 1 66 - 65 - 1 66 1 t 66 - 1 6 — | fi6 6 1 ^ — 64 1 j |R>EX licsrcRfz. IMSB006I 48 48 1 47 ~~ 47 “ 1 48 1 | 48 1 39 48 3 1 48 1 48 ' 1 1 i l l i 1 1 r II 1 1 IKRT POL (i p c e h m e m u l [R13W»3| 31 — 3i 1 31 “ 30 — 1 *1 i ;| 31 1 21 " k 4 1 20 20 1 1 i l l 1 1 1 II 1 1 |TK2PNT vrom |OVST TON3SXK |R15PO02| 3i - 3i - 1 30 — 30 “*■ 1 31 l 1 31 i 1 28 3i i 1 2l 2l 1 1 1 1 1 1 1 1 1 1 1 jinSON RIVER |IfTKM |R15a004| 19 ■* 19 ~ 1 U “ 18 1 is | 19 -— 1 14 is i 1 li ] 1 . 1 1 1 y 1 1 11 J 1 1 |QIUBHN1 tfOER (OiMWIUL |KL5B021| 32 — 32 — 1 30 — 30 * i 1 32 1 & 32 4 1 19 19 1 1 III r 1 1 II2 1 1 (WWHEMI RIVER |fWOJHS BRIDCZ |Rl5B009j 36 — * — 1 35 — 35 1 ^ 1 36 1 25 % 2 1 3$ iS 1 1 1 1 1 1 1 !l 1 |ST. PH7T RIVER |axuFcro laic |RX5BQ34| 23 - 23 - 1 22 - 22 - - | zi - 1 20 - | 23 i 1 z* - a — 1 1 P (sr. w o t h u c t |axuFH> amxz |R15B0W| 47 - 47 - 1 47 - 46 1 47 - 1 47 - 1 43 “ | 47 — 1 42 ~ 42 • I |ST. NEDT RIVES rnovfazro roar |H1SB008| 47 — 47 ■“ 1 46 — 46 1 47 | 44 47 5 | 45 1 45 1 1 ! i l l 1 r ‘\ 1 |rCRn*COD BROCK jvcRim |KL5B016| 28 - 29 - 1 & - zi “ | 29 - ij 28 - 1 21 - | a J 1 44 — is • 1 fHJOTKrD HOCK [HSNttT ERTPZ |KL5B01i| 34 34 1 33 ■“ 33 1 34 \ 34 t 27 34 5 1 20 20 1 1 1 I 1 j I 1 it 1 1 \ ISCTiHPCK STFEPM |S3HJBK3C KS B & a m liastmi 24 - 24 - 1 33 - 23 - | 24 - | 24 - 1 20 24 - 1 22 — 22 - | |SmSBKK S3JUM riHjmvujms ERUCE |KL£B010| 34 “ 34 “ 1 33 33 1 34 1 34 1 30 34 1 22 22 1 1 1 III J 1 1 li ;| ‘ 1 I pedx 8.9 Appendix RATIONAL RIVERS AUTHORITY - SOUTH WEST REGION 1991 RIVER HATER QUALITY CLASSIFICATION PERCENTAGE EXCEEDENCE OP DETERMINAND STATISTICS FROM QUALITY STANDARDS CATCHMENT: FOWEY

| River )Reach upstream of | User | PERCENTAGE EXCEEDENCE OF STATISTIC FROM QUALITY STANDARD 1 | Ref. | i 1 1 I I 1 1 j Nunberj pH Lower | pH Upper |Teoqperature| DO (%) | BOD (ATU) | Total Un-ionised Suspended j Total j Total | 1 1 1 1 | j j j Aimonia Ansnonia Solids j Copper | Zinc { 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 |FOWEY |HARROWBRIDGE |R15B001| - | 1 - | - | - - | 1 1 |FOWEY |IAMELGATE IR15B024| - | 1 - I - | - - 1 | | 1 FOWEY |DRAYNES BRIDGE IR15B002| - | I - I - | - - | | | |FOWEY |TREVERBYN BRIDGE |R15B003| - | 1 - 1 - | -- - | - | t |FOWEY |BODITHIEL BRIDGE (R15B004| - | 1 - I - | - - 1 1 1 |FOWEY IRESPRYN BRIDGE |R15B025| - 1 1 - | - ■ 1 -- - | - | - | |FOWEY |RESTORMEL |R15B0Q6| — - | — 1 1 1 1 1 1 1 1 1 jpONT PILL ITRETHAKE MILL |R15AQ03| — — • | * | 1 1 1 1 1 ! , , - 1 jTREBANT HATER |EAST TENCREEK |RI5A002| — “ ^ | * | 1 _ 1 1 1 1 _ 1 1 1 | LERRYN RIVER fLERRYN |R15AD04| — “ - 1 * 1 1 ... I I 1 1 1 ... \ 1CARDINHAM HATER |GLYNNMILL |R15B021| "'""3 |"" " | * | 1 1 1 1 1 1 1 ____ 1 j HARLEGGAN RIVER |PANTERS BRIDGE |R15B009| ““ ~ ** " | * | 1 _ 1 1 1 1 1 1 1 jST. NEOT RIVER (COLLIFORD LAKE |R15B034| - | - 1 - | - - 1 - - - | - | ~ 1 |ST. NEOT RIVER |COLLIFORD BRIDGE |R15B014| - { - 1 - I - - | - — - | - I ~ 1 |ST. NEOT RIVER |TWO HATERS FOOT |R15B008| — • | *■ | 1 1 1 1 1 _ 1 1 ... 1 jNORTHWOOD BROOK |WDRTHA JR15B016( - | } - | - I-- | j j |RORTHWOOD BROOK ITRENANT BRIDGE |R15B011| • - 1 • 1 1 ... 1 1 1 1 1 1 1 |SIBLYBACK STREAM |SIBLYBACK RESERVOIR |R1SB033| - 1 1 - { - } - - - j | j |SIBLYBACK STREAM |TREKEIVESTEPS BRIDGE (R15B010| * — | i 1 ___t 1 1 1 1 1 _ 1

i’ ' Appendix B.10