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Overall Rivers 2025AveMaxBirkin BrookMobberley BrookRiver BollinPeover EyePeover Lakesbestworst
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Riverfly Project (RP)Excellent16.020Good14.6Excellent15.3Excellent16Excellent18.0Lakefly22.3
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Water quality (RP)Good33.639Good34.2Good35.7Fair27Good37.3P04-P ppm0.111
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Silt and Flow (RP)Good40.244Good42.6Good41.0Fair34Good43.0hypertrophic
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Water Quality (BMWP)Excellent124.8159Excellent110.2Excellent132.0Excellent105Excellent152.0Good77.3
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pH (WFD-AWIC)Excellant1.82.3Excellant1.9Excellant1.9Excellant1.7Excellant1.8Excellant1.2
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Lotic Flow IndexModerate//Fast2.42.2Moderate//Fast2.4Moderate//Fast2.5Moderate//Fast2.5Moderate//Fast2.4Slow3.2
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Sedimented (E-PSI mix)Minimally91.194Minimally90.8Minimally89.0Minimally91.3Minimally93.5Moderatly57.7
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Average Biotic Index (ASPT)Excellent6.27.726Good5.759Good5.647Excellent6.18Excellent7.326Fair4.463
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Conservation Value (CCI)High19.926.47High17.08High19.81High18Very High24.77Very High22.64
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Number of Samples15PlusSamples5Samples3Samples1Samples3Samples3
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# of Invertebrates identified20,92634,180
Copepods
Fishery StatusFishery StatusFishery StatusFishery StatusFishery Status
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Average Sample size1395Game FisheryGame FisheryGame FisheryGame FisheryGame Fishery
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Plant Species Trophic Rank (STR) to Eutrophication
Most tolerantModeratly sensitive
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16
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Overall Rivers 2024AveMaxBirkin BrookMobberley BrookRiver BollinPeover EyePeover Lakesbestworst
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Riverfly Project (RP)Good14.519Excellent16.3Excellent15.4Fair9Excellent17.2Park Lake
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Water quality (RP)Good33.442Good37.6Good33.9Fair24Good38.0Status
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Silt and Flow (RP)Good40.052Good47.3Good42.3Poor27Good43.6eutrophic0.111
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Water Quality (BMWP)Excellent110.4146Excellent121.8Excellent125.6Fair68.67Excellent125.6Excellent88.5
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pH (WFD-AWIC)Excellant1.51.7Excellant1.5Excellant1.6Excellant1.43Excellant1.5Excellant1.3
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Lotic Flow IndexModerate//Fast2.51.5Moderate//Fast2.5Moderate//Fast2.7Moderate//Fast2.3Moderate//Fast2.4Standing5.600
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Sedimented (E-PSI mix)Slightly79.496.8Minimally88.8Minimally81.3Moderatly58.5Minimally88.9Sedimented32.4
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Average Biotic Index (ASPT)Excellent6.09.427Good5.393Excellent6.127Good5.33Excellent6.978Poor4.089
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Conservation Value (CCI)Fairly High13.820.8High16.26Fairly High12.47Fairly High11.07High15.51Very High35.255
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Fishery StatusFishery StatusFishery StatusFishery StatusFishery Status
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# of Invertebrates identified33,88821
Samples
Game FisheryGame FisheryCoarse FisheryGame FisheryGame Fishery
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Average Sample size1614Most tolerantMost tolerantMost tolerantMost tolerantModeratly sensitive
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Plant Species Trophic Rank (STR) to Eutrophication
31
32
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Overall Rivers 2023AveMaxBirkin BrookMobberley BrookRiver BollinPeover EyePeover Lakesbestworst
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Riverfly Project (RP)Excellent15.718Good14.6Excellent16.0Excellent16.4Park Lake
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Water quality (RP)Good36.242Good34.8Good35.1Good38.8Status
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Silt and Flow (RP)Good42.649Good43.3Good41.1Good43.4eutrophic
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Water Quality (BMWP)Excellent119.7149Excellent116.1Excellent120.0Excellent123.0Excellent113.0
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pH (WFD-AWIC)Excellant1.51.7Excellant1.4Excellant1.5Excellant1.6Excellant1.4
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Lotic Flow IndexModerate//Fast2.72.7Moderate//Fast2.724Moderate//Fast2.638Moderate//Fast2.7Sluggish4.750
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Sedimented (E-PSI mix)Minimally87.792Minimally85.8Minimally87.1Minimally90.2Slightly70.2
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Average Biotic Index (ASPT)Excellent6.18.93Good5.124Good5.665Excellent7.611Poor3.683
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Conservation Value (CCI)Fairly High13.719.74Fairly High11.76Fairly High13.16High16.09Very High33.37
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Ammonia NH3-N ppmHigh Status0.0610.140High Status0.046High Status0.059High Status0.093High Status0.210
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Phosphate (Ortho) PO4-P ppmGood Status0.1380.58Good Status0.172Good Status0.131Good Status0.083Good Status0.08
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Nitrate NO3-N ppmElevated3.1912.654.353666667Elevated1.9Elevated3.9Elevated4.2Elevated1.08
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Nitrite NO2-N ppmLow0.02460.066Low0.019Low0.021Moderate0.043Low0.022
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Conductivity µS.Moderate535657Moderate505Moderate568Moderate560Moderate414
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Sodium Nitrite NaN02 ppmVery low0.1210.325Fishery StatusFishery Status Fishery StatusFishery Status
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# of Invertebrates identified31,76219
Samples
Game FisheryGame FisheryGame FisheryGame Fishery
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Average Sample size1672Most tolerantMost tolerantMost tolerantModeratly sensitive
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Plant Species Trophic Rank (STR) to Eutrophication
52
53
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Overall Rivers 2022AveMaxBirkin BrookMobberley BrookRiver BollinPeover EyePeover Lakesbestworst
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Riverfly Project (RP)Good12.919Good13.5Good14.0Poor8.8Excellent15.3Park Lake
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Water quality (RP)Good32.041Good32.5Good33.2Fair26Good36.3Status
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Silt and Flow (RP)Fair37.550Good40.2Fair39.9Fair30.5Fair39.5eutrophic
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Water Quality (BMWP)Excellent108.9154Excellent106.2Excellent107.9Excellent92.75Excellent128.8Excellent100.7
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pH (WFD-AWIC)Excellant1.30Excellant1.3Excellant1.3Excellant1.3Excellant1.2Excellant1.1
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Lotic Flow IndexModerate//Fast2.32.9Moderate//Fast2.157Moderate//Fast2.410Moderate//Fast2.05Moderate//Fast2.5Sluggish4.500
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Sedimented (E-PSI mix)Minimally86.769.5Minimally86.8Minimally82.55Minimally87.25Minimally90.32Moderatly51.6
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Average Biotic Index (ASPT)Excellent6.49.51Good5.471Good5.468Excellent6.353Excellent8.498Good4.945
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Conservation Value (CCI)Fairly High10.420.73Moderate9.50Moderate9.16Moderate9.838Fairly High13.05High15.7
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Ammonia NH3-N ppmHigh Status0.1110.29High Status0.110High Status0.100High Status0.22High Status0.023High Status0.148
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Phosphate (Ortho) PO4-P ppm
Moderate/Poor
0.6151.595
Moderate/Poor
0.509
Moderate/Poor
0.895
Moderate/Poor
0.719High Status0.058High Status0.06
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Nitrate NO3-N ppmExcessive6.9715.050Elevated4.2Excessive9.3Excessive7.76Elevated4.353Natural<1
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Nitrite NO2-N ppmModerate0.04680.102Moderate0.039Moderate0.043High0.086Very Low0.008Very Low0.002
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Sodium Nitrite NaN02 ppmVery low0.2060.503Fishery StatusFishery StatusFishery StatusFishery StatusFishery Status
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# of Invertabrates identified48,46443
Samples
Game FisheryGame FisheryGame FisheryGame FisheryGame Fishery
70
Average Sample size1127Moderatly SensitiveModeratly SensitiveModeratly SensitiveMost TolerantModeratly Sensitive
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Plant Species Trophic Rank (STR) to Eutrophication
72
73
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2021RESULTSAveMaxBirkin BrookMobberley BrookRiver Bollinbestworst
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Riverfly Project (RP)Fair10.510.5Fair10.5~0~0
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Water quality (RP)Fair26.526.5Fair26.5~0~0
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Silt and Flow (RP)Fair3434Fair34~0~0
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Water Quality (BMWP)Good81.581.5Good81.5~0~0
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Sedimented (E-PSI mix)Slightly76.676.6Slightly76.6~0~0
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Average Biotic Index (ASPT)Fair4.94.9Fair4.83~0~0
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Conservation Value (CCI)Fairly High10.110.1Fairly High10.12~0~0
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Ammonia~00WHPT6.544Fishery StatusPeriphyton
84
Phosphate~00SPEAR6.653Game Fishery1096%
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Nitrate~00LIFE(s)2.286
86
Water PlantsSpecies Trophic Rank (STR) to Eutrophication0~~~
87
88
89
2020RESULTSAveMaxBirkin BrookMobberley BrookRiver Bollinbestworst
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Riverfly Project (RP)Good1214Good12Good12.5Fair11.5
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Water Quality (BMWP)Good84.2107Excellent86.2Good82Good84
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Sedimented (E-PSI mix)Minimally83.891.4Minimally83.8Minimally81.4Minimally86.2
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Average Biotic Index (ASPT)Excellent6.19.7Excellent6.53Good5.33Excellent6.32
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Conservation Value (CCI)Moderate9.212.4Moderate9.54Moderate8.37Moderate9.55
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AmmoniaVery Low0.020.05WHPT6.544Fishery StatusPeriphyton
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PhosphateLow0.30.5SPEAR6.653Game Fishery1096%
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NitrateLow5.4430LIFE(s)2.286
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Water PlantsSpecies Trophic Rank (STR) to Eutrophication6Moderatly sensitive
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