Under 80 metres,Type 1,Type 2,Type 3,Type 5,Type 7, Over 80 metres,Type 4,Type 6, Column 1,Column 2, Upland and low alkalinity,Types (1+2), 4 and 6, Lowland and high alkalinity,Types 3, 5 and 7, Under 80 metres,Type 1n,Type 3n, Over 80 metres,Type 2n,Type 4n, Bedrock channel,Normally high altitude,Channel cuts down laterally,May have waterfalls and/or cascades,Bedrock substrate, Cascade Step Pool,Normally high altitude,Channel cuts down,Both turbulent and tranquil flows,Cobble and boulder substrate, Pool-riffle-glide,Normally medium altitude,Often not confined within a valley,Slightly meandering,Pebble and cobble substrate, Meandering,Normally low altitude,Flow laminar and would naturally interact with floodplain,Meandering,More fines than other substrates, A1,< 810.5,< 0.715,Any, ≥ 0.715,≥ 251.8, A2,< 810.5,≥ 0.715,< 251.8,≤ 100 (A2 headwaters) > 100 (A2 downstream) , ≥ 810.5 and < 1413,≥ 0.7495,Any,≤ 100 (A2 headwaters) > 100 (A2 downstream) , B1,≥ 810.5 and < 1155,≥ 0.3615 and < 0.7495,< 267.4, B2,≥ 810.5 and < 1413,≥ 0.3615 and < 0.7495,< 267.4, C2,≥ 1155 and < 1413,≥ 0.3615 and < 0.7495,< 267.4, ≥ 1413,≥ 0.3615,≥ 32.33, D2,≥ 1413,≥ 0.3615,< 32.33, ≥ 810.5,< 0.3615,Any, Salmonid,Freshwater lakes which would naturally support populations of salmonid fish, Cyprinid,Freshwater lakes in which populations of salmonid fish do not occur naturally, Low alkalinity,< 200, Moderate alkalinity,200 – 1000, High alkalinity,> 1000, Marl, Very shallow,< 3, Shallow,3 – 15, Deep,> 15, Humic,> 30, Non humic,≤ 30, Mean depth,Metres,Shallow < 3,Deep ≥ 3, Altitude,Metres,Low < 200,Mid ≥ 200 < 800,High ≥ 800, Size (lake area),Hectares,Small < 50,Large ≥ 50, Basin form,V d = 3D mean / D max where D = depth of lake in metres, D mean = mean depth and D max = maximum depth ,V V d < 0.67 ,L V d ≥ 0.67 , ,% of catchment,Micro-equivalents per litre,Micro Siemens per centimetre,Platinum (mg/l), Peat,> 75% peat,n/a,n/a,> 30, Low Alkalinity,> 90% siliceous,< 200,≤ 70,≤ 30, Moderate Alkalinity,> 50% siliceous and ≤ 90% siliceous,200 – 1000,> 70 and ≤, High Alkalinity,> 50% calcareous,> 1000,> 250 and ≤ 1000, Marl,> 65% limestone, Brackish,Any,n/a,> 1000, Low Alkalinity Very Shallow ,P/L-vS,<4m,< 20 mgl -1 CaCO 3, Low Alkalinity Shallow/Deep,P/L-ShD,>4m,< 20 mgl -1 CaCO 3, Moderate Alkalinity Very Shallow,MA-vS,<4m,20 – 100 mgl -1 CaCO 3, Moderate Alkalinity Shallow/Deep,MA-ShD,>4m,20 – 100 mgl -1 CaCO 3, High Alkalinity Very Shallow,HA/M-vS,<4m,> 100 mgl -1 CaCO 3, High Alkalinity Shallow/Deep,HA/M-ShD,>4m,> 100 mgl -1 CaCO 3, (1) Where a lowland, high alkalinity river is a salmonid river (as designated by Directive 2006/44/EC ‘on the quality of freshwaters needing protection or improvement in order to support fish life’) the standards for the upland, low alkalinity type will apply. , (10-percentile), Column 1,Column 2,Column 3,Column 4,Column 5,Column 6, Type,High,Good,Moderate,Poor,Bad, Upland and low alkalinity,80,75,64,50,< 50, Lowland and high alkalinity,70,60,54,45,< 45, (90-percentile), Column 1,Column 2,Column 3,Column 4,Column 5,Column 6, Type,High,Good,Moderate,Poor,Bad, Upland and low alkalinity,0.2,0.3,0.75,1.1,> 1.1, Lowland and high alkalinity,0.3,0.6,1.1,2.5,> 2.5, (i) The standard for Biochemical Oxygen Demand shall be used when deciding action to meet the standard for dissolved oxygen. , (ii) Where a lowland, high alkalinity river is a salmonid river (as designated by Directive 2006/44/EC ‘on the quality of freshwaters needing protection or improvement in order to support fish life’) the standards for the upland, low alkalinity type will apply. , (90-percentile), Column 1,Column 2,Column 3,Column 4,Column 5,Column 6, Type,High,Good,Moderate,Poor,Bad, Upland and low alkalinity,3,4,6,7.5,> 7.5, Lowland and high alkalinity,4,5,6.5,9,> 9, (annual mean), Column 1,Column 2,Column 3,Column 4,Column 5,Column 6, Type,High,Good,Moderate,Poor,Bad, 1n,30,50,150,500,> 500, 2n,20,40,150,500,> 500, 3n+4n,50,120,250,1000,> 1000, Column 1,Column 2,Column 3,Column 4,Column 5, High,Good,Moderate,Poor,Bad, (5 and 95 percentile),(10 percentile),(10 percentile),(10 percentile), ≥ 6 to ≤ 9,4.7,4.2,< 4.2, (1) ‘Qn’ is the naturalized mean daily flow for a specified period of record , (2) ‘Qnx’ is the Qn that is expected to be exceeded by ‘x’ percent of the naturalized mean daily flows within a specified period of record , High, Column 1,Column 2,Column 3, Maximum permitted % abstraction at Qn exceeding Qn95,Maximum permitted % abstraction at Qn not exceeding Qn95, A1, A2 (downstream), A2 (headwaters), B1, B2, C2, D2,10,5, Good, Column 1,,Column 2,Column 3,Column 4,Column 5, River type,,Maximum % abstraction at Qn exceeding Qn60,Maximum % abstraction at Qn exceeding Qn70,Maximum % abstraction at Qn exceeding Qn95,Maximum % abstraction at Qn not exceeding Qn95, A1,April-Oct,30,25,20,15, Nov-Mar,35,30,25,20, A2 (downstream), B1, B2,April-Oct,25,20,15,10, Nov-Mar,30,25,20,15, A2 (headwaters), C2, D2,April-Oct,20,15,10,7.5, Nov-Mar,25,20,15,10, Moderate, Column 1,,Column 2,Column 3,Column 4,Column 5, River type,,Maximum % abstraction at Qn exceeding Qn60,Maximum % abstraction at Qn exceeding Qn70,Maximum % abstraction at Qn exceeding Qn95,Maximum % abstraction at Qn not exceeding Qn95, A1,April-Oct,55,50,45,40, Nov-Mar,60,55,50,45, A2 (downstream), B1, B2,,April-Oct,50,45,40,35, Nov-Mar,55,50,45,40, A2 (headwaters), C2, D2,April-Oct,45,40,35,32.5, Nov-Mar,50,45,40,35, Poor, Column 1,,Column 2,Column 3,Column 4,Column 5, River type,,Maximum % abstraction at Qn exceeding Qn60,Maximum % abstraction at Qn exceeding Qn70,Maximum % abstraction at Qn exceeding Qn95,Maximum % abstraction at Qn not exceeding Qn95, A1,April-Oct,80,75,70,65, Nov-Mar,85,80,75,70, A2 (downstream), B1, B2,,April-Oct,75,70,65,60, Nov-Mar,80,75,70,65, A2 (headwaters), C2, D2,April-Oct,70,65,60,57.5, Nov-Mar,75,70,65,60, Bad, Column 1,,Column 2,Column 3,Column 4,Column 5, River type,,Maximum % abstraction at Qn exceeding Qn60,Maximum % abstraction at Qn exceeding Qn70,Maximum % abstraction at Qn exceeding Qn95,Maximum % abstraction at Qn not exceeding Qn95, A1,April-Oct,>80,>75,>70,>65, Nov-Mar,>85,>80,>75,>70, A2 (downstream), B1, B2,,April-Oct,>75,>70,>65,>60, Nov-Mar,>80,>75,>70,>65, A2 (headwaters), C2, D2,April-Oct,>70,>65,>60,>57.5, Nov-Mar,>75,>70,>65,>60, High,9,8, Good,7,6, Moderate,4,4, Poor,1,1, Bad,< 1,< 1, Good,1000, Column 1,Column 2,Column 3,Column 4,Column 5, High,Good,Moderate,Poor,Bad, R ÷ H; or 5, whichever value is the larger value,R ÷ G; or 8, whichever is the larger value,(R ÷ G) ÷ 0.5,(R ÷ G) ÷ 0.25,> (R ÷ G) ÷ 0.25, Column 1,Column 2,Column 3,Column 4,Column 5,Column 6, Geological and depth category,High,Good,Moderate,Poor,Bad, High alkalinity; shallow,16,23,46,92,> 92, High alkalinity; very shallow,23,31,62,124,> 124, Moderate alkalinity; deep,8,12,24,48,> 48, Moderate alkalinity; shallow,11,16,32,64,> 64, Moderate alkalinity; very shallow,15,22,44,88,> 88, Low alkalinity; deep,5,8,16,32,> 32, Low alkalinity; shallow,7,10,20,40,> 40, Low alkalinity; very shallow,9,14,28,56,> 56, Marl; shallow,9,20,40,80,> 80, Marl; very shallow,10,24,48,96,> 96, percentage reduction in mean daily inflow, Column 1,Col 2,Col 3,Col 4,Col 5,Col 6,Col 7,Col 8,Col 9,Col 10,Col 11,Col 12,Col 13,Col 14, Geology,,Altitude,Low,Mid,High, ,,Size,Small,Large,Small,Large,Small,Large, ,,Basin form,L,V,L,V,L,V,L,V,L,V,L,V, ,,Depth,,,,,,,,,,,,, Peat,Summer,Deep,15,15,15,10,15,15,15,10,15,15,15,10, Shallow,15,10,10,10,15,10,10,10,15,10,10,10, Winter,Deep,15,15,15,10,15,10,10,10,12,10,10,10, Shallow,15,10,10,10,10,10,10,10,10,10,10,5, Low Alkalinity,Summer,Deep,30,25,25,25,30,25,25,25,30,25,25,25, Shallow,25,25,25,25,25,25,25,25,25,25,25,25, Winter,Deep,20,20,20,20,20,20,20,15,20,15,15,15, Shallow,20,20,20,15,20,15,15,15,15,15,15,15, Medium Alkalinity,Summer,Deep,20,20,20,20,20,20,20,20,20,20,20,20, Shallow,20,20,20,15,20,15,15,15,15,15,15,15, Winter,Deep,20,20,20,20,20,20,20,15,20,15,15,15, Shallow,20,20,20,15,20,15,15,15,15,15,15,15, High Alkalinity, Marl,Summer,Deep,30,25,25,25,30,25,25,25,30,25,25,25, Shallow,25,25,25,25,25,25,25,25,25,25,25,25, Winter,Deep,30,25,25,25,25,25,25,25,25,25,25,25, Shallow,25,25,25,25,25,25,25,25,25,25,25,20, Brackish,Summer,Deep,20,20,20,20,20,20,20,20,20,20,20,20, Shallow,20,20,20,15,20,20,20,15,20,20,20,15, Winter,Deep,30,25,25,25,30,25,25,25,25,25,25,25, Shallow,25,25,25,25,25,25,25,25,25,25,25,25, High,5.7, Good,4.0, Moderate,2.4, Poor,1.6, Bad,<1.6, High,≥5.7, Good,≥4.0 and <5.7, Moderate,≥2.4 and <4.0, Poor,≥1.6 and <2.4, Bad,<1.6, High,12, Good,18, Moderate,30, Poor,40.5, Bad,>40.5, (1) The standards for 2,4 D specified in Column 2 and Column 4 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3,Column 4, Annual mean (µg/l),95-percentile (µg/l),Annual mean (µg/l),95-percentile (µg/l), 0.3,1.3,0.3,1.3, Column 1,Column 2, Annual mean (µg/l),Annual mean (µg/l), 20,20, (1) The standard for arsenic refers to the dissolved fraction of a water sample obtained by filtration through a 0.45µm filter or any equivalent pre-treatment , Column 1,Column 2, Annual mean (µg/l),Annual mean (µg/l), 50,25, (1) The standards for chlorine specified in Column 2 and 3 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , (2) The term “total residual oxidants” refers to the sum of all oxidising agents existing in water, expressed as available chlorine. , Column 1,Column 2,Column 3, Annual mean concentration (µg/l) of total available chlorine,95-percentile concentration (µg/l) of total available chlorine,95-percentile concentration (µg/l) of total residual oxidant, 2,5,10, (1) The standard for chromium VI specified in column 3 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3, Annual mean concentration (µg/l) of dissolved chromium VI,Annual mean concentration (µg/l) of dissolved chromium VI,95-percentile concentration (µg/l) of dissolved chromium VI, 3.4,0.6,32, (1) The standard for chromium III specified in column 2 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water , Column 1,Column 2, Annual mean concentration (µg/l) of dissolved chromium III,95-percentile concentration (µg/l) of dissolved chromium III, 4.7,32, Column 1,Column 2,Column 3, Annual mean concentration of CaCO 3 (mg/l),Annual mean concentration (µg/l) of dissolved copper,Annual mean concentration (µg/l) of dissolved copper, 0 – 50,1,5, 50 – 100,6, 100 – 250,10, > 250,28, (1) The standards for cyanide specified in column 2 and column 4 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3,Column 4, Annual mean concentration (µg/l) of hydrogen cyanide,95-percentile concentration (µg/l) of hydrogen cyanide,Annual mean concentration (µg/l) of hydrogen cyanide,95-percentile concentration (µg/l) of hydrogen cyanide, 1,5,1,5, (1) The 95-percentile standards for cypermethrin must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3,Column 4, Annual mean (ng/l),0.1,Annual mean (ng/l),0.1, 95-percentile (ng/l),0.4,95-percentile (ng/l),0.41, (1) The standards for diazinon specified in column 2 and column 4 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3,Column 4, Annual mean (µg/l),95-percentile (µg/l),Annual mean (µg/l),95-percentile (µg/l), 0.01,0.02,0.01,0.1, (1) The standards for dimethoate specified in column 2 and column 4 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3,Column 4, Annual mean (µg/l),95-percentile (µg/l),Annual mean (µg/l),95-percentile (µg/l), 0.48,4.0,0.48,4.0, Column 1,Column 2, Annual mean concentration (mg/l) of dissolved iron,Annual mean concentration (mg/l) of dissolved iron, 1,1, (1) The standards for linuron specified in column 2 and column 4 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3,Column 4, Annual mean (µg/l),95-percentile (µg/l),Annual mean (µg/l),95-percentile (µg/l), 0.5,0.9,0.5,0.9, (1) The standards for mecoprop specified in column 2 and column 4 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3,Column 4, Annual mean (µg/l),95-percentile (µg/l),Annual mean (µg/l),95-percentile (µg/l), 18,187,18,187, Column 1,Column 2, 95-percentile (µg/l),95-percentile (µg/l), 0.01,0.01, (1) The standards for phenol specified in column 2 and column 4 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3,Column 4, Annual mean (µg/l),95-percentile (µg/l),Annual mean (µg/l),95-percentile (µg/l), 7.7,46,7.7,46, (1) The standards for toluene specified in column 2 and column 4 must not be used for the purpose of classifying the ecological status or potential of bodies of surface water. , Column 1,Column 2,Column 3,Column 4, Annual mean (µg/l),95-percentile (µg/l),Annual mean (µg/l),95-percentile (µg/l), 50,380,40,370, (1) The standards applicable to intermediate water hardness must be calculated by simple linear interpolation. , Column 1,Column 2,Column 3, Annual mean concentration of CaCO 3 (mg/l),Annual mean concentration (µg/l) of total zinc,Annual mean concentration (µg/l) of dissolved zinc, 0 – 50,8,40, 50 – 100,50, 100 – 250,75, > 250,125, Annual mean (µg/l),Annual mean (µg/l), Not applicable,21, (i) This parameter is the Environmental Quality Standard expressed as an annual average value (AA-EQS). Unless otherwise specified, it applies to the total concentrations of all isomers of the pollutant concerned. , (ii) This parameter is the Environmental Quality Standard expressed as a maximum allowable concentration (MAC-EQS). Where the MAC-EQS are marked as “not applicable”, the AA-EQS values are considered protective against short-term pollution peaks in continuous discharges since they are significantly lower than the values derived on the basis of acute toxicity. , (iii) For the group of priority substances covered by brominated diphenylethers listed in Decision 2455/2001/EC , an EQS is established only for congener numbers 28, 47, 99, 100, 153 and 154. , (iv) For cadmium and its compounds the EQS values vary dependent upon the hardness of the water as specified in five class categories (class 1: <40mg CaCO 3 /l, class 2: 40 to <50mg CaCO 3 /l, class 3: 50 to <100mg CaCO 3 /l, class 4: 100 to <200mg CaCO 3 /l and class 5: ≥200mg CaCO 3 /l). , (v) DDT total comprises the sum of the isomers 1,1,1-trichloro-2,2 bis ( p -chlorophenyl) ethane (CAS number 50-29-3; EU number 200-024-3); 1,1,1-trichloro-2 ( o -chlorophenyl)-2-( p -chlorophenyl) ethane (CAS number 789-02-6; EU number 212-332-5); 1,1-dichloro-2,2 bis ( p -chlorophenyl) ethylene (CAS number 72-55-9; EU number 200-784-6); and 1,1-dichloro-2,2 bis ( p -chlorophenyl) ethane (CAS number 72-54-8; EU number 200-783-0). , (vi) If the Department does not apply standards for biota it shall introduce stricter standards for water in order to achieve the same level of protection as the standards for biota set out in regulation 4. The Department shall notify the European Commission of the reasons and basis for using this approach, the alternative standards used, the data and the methodology by which the alternative standards were derived and the categories of surface water to which they would apply. , Application of the standards set out in Table 37 For any given surface water body, applying the AA-EQS means that, for each representative monitoring point within the water body, the arithmetic mean of the concentrations measured at different times during the year does not exceed the standard. The calculation of the arithmetic mean, the analytical method used and, where there is no appropriate analytical method meeting the minimum performance criteria, the method of applying a standard must be in accordance with implementing acts adopting technical specifications for chemical monitoring and quality of analytical results, in accordance with the Water Framework Directive. For any given surface water body, applying the MAC-EQS means that the measured concentration at any representative monitoring point within the water body does not exceed the standard. However, in accordance with section 1.3.4. of Annex V to the Water Framework Directive, the Department may introduce statistical methods, such as a percentile calculation, to ensure an acceptable level of confidence and precision for determining compliance with the MAC-EQS. With the exception of cadmium, lead, mercury and nickel (hereinafter “metals”) the standards set out in Table 37 are expressed as total concentrations in the whole water sample. In the case of metals the standards refer to the dissolved concentration i.e. the dissolved phase of a water sample obtained by filtration through a 0.45 µm filter or any equivalent pre-treatment. The Department may, when assessing the monitoring results against the standards, take into account: natural background concentrations for metals and their compounds, if they prevent compliance with the standard; and hardness, pH or other water quality parameters that affect the bioavailability of metals. , Alachlor,15972-60-8,0.3,0.7,0.3,0.7, Anthracene,120-12-7,0.1,0.4,0.1,0.4, Atrazine,1912-24-9,0.6,2.0,0.6,2.0, Benzene,71-43-2,10,50,8,50, Brominated diphenylether,32534-81-9,0.0005,not applicable,0.0002,not applicable, Cadmium and its compounds (depending on water hardness classes),7440-43-9,≤ 0.08 (class 1) 0.08 (class 2) 0.09 (class 3) 0.15 (class 4) 0.25 (class 5) ,≤ 0.45 (class 1) 0.45 (class 2) 0.6 (class 3) 0.9 (class 4) 1.5 (class 5) ,0.2,≤ 0.45 (class 1) 0.45 (class 2) 0.6 (class 3) 0.9 (class 4) 1.5 (class 5) , Carbon-tetrachloride,56-23-5,12,not applicable,12,not applicable, C10-13 Chloroalkanes,85535-84-8,0.4,1.4,0.4,1.4, Chlorfenvinphos,470-90-6,0.1,0.3,0.1,0.3, Chlorpyrifos (Chlorpyrifos-ethyl),2921-88-2,0.03,0.1,0.03,0.1, Cyclodiene pesticides:,,,,,, Aldrin,309-00-2,Σ=0.01,not applicable,Σ=0.005,not applicable, Dieldrin,60-57-1, Endrin,72-20-8, Isodrin,465-73-6, DDT total,not applicable,0.025,not applicable,0.025,not applicable, Para-para-DDT,50-29-3,0.01,not applicable,0.01,not applicable, 1,2-Dichloroethane,107-06-2,10,not applicable,10,not applicable, Dichloromethane,75-09-2,20,not applicable,20,not applicable, Di(2-ethylhexyl)-phthalate (DEHP),117-81-7,1.3,not applicable,1.3,not applicable, Diuron,330-54-1,0.2,1.8,0.2,1.8, Endosulfan,115-29-7,0.005,0.01,0.0005,0.004, Fluoranthene,206-44-0,0.1,1,0.1,1, Hexachloro-benzene,118-74-1,0.01,0.05,0.01,0.05, Hexachloro-butadiene,87-68-3,0.1,0.6,0.1,0.6, Hexachloro-cyclohexane,608-73-1,0.02,0.04,0.002,0.02, Isoproturon,34123-59-6,0.3,1.0,0.3,1.0, Lead and its compounds,7439-92-1,7.2,not applicable,7.2,not applicable, Mercury and its compounds,7439-97-6,0.05,0.07,0.05,0.07, Naphthalene,91-20-3,2.4,not applicable,1.2,not applicable, Nickel and its compounds,7440-02-0,20,not applicable,20,not applicable, Nonylphenol (4-Nonylphenol),104-40-5,0.3,2.0,0.3,2.0, Octylphenol ((4-(1,1’,3,3’-tetramethylbutyl)-phenol)),140-66-9,0.1,not applicable,0.01,not applicable, Pentachloro-benzene,608-93-5,0.007,not applicable,0.0007,not applicable, Pentachloro-phenol,87-86-5,0.4,1,0.4,1, Benzo(a)pyrene,50-32-8,0.05,0.1,0.05,0.1, Benzo(b)fluor-anthene,205-99-2,Σ=0.03,not applicable,Σ=0.03,not applicable, Benzo(k)fluor-anthene,207-08-9, Benzo(g,h,i)-perylene,191-24-2,Σ=0.002,not applicable,Σ=0.002,not applicable, Indeno(1,2,3-cd)-pyrene,193-39-5, Simazine,122-34-9,1,4,1,4, Tetrachloro-ethylene,127-18-4,10,not applicable,10,not applicable, Trichloro-ethylene,79-01-6,10,not applicable,10,not applicable, Tributyltin compounds (Tributhyltin-cation),36643-28-4,0.0002,0.0015,0.0002,0.0015, Trichloro-benzenes,12002-48-1,0.4,not applicable,0.4,not applicable, Trichloro-methane,67-66-3,2.5,not applicable,2.5,not applicable, Trifluralin,1582-09-8,0.03,not applicable,0.03,not applicable, (1) “relevant territorial waters” means the waters which extend seaward for 3 miles from the baselines from which the breadth of the territorial sea adjacent to Northern Ireland is measured. , (2) The reference method of measurement shall be gas chromatography with electron capture detection after extraction by means of an appropriate solvent, or an alternative method that is at least as reliable. The limit of detection is 0.1 µg/litre. The accuracy and precision of the method shall be plus or minus 50% at a concentration which represents twice the value of the limit of determination. , (3) Where samples are taken from more than one sampling point in relation to the waters in question, the standard shall be satisfied in relation to the samples from each sampling point. , (4) Maximum Allowable Concentration , Sampling and analysis of the substances set out in Table 38 Samples shall be taken at a frequency sufficient to show any changes in the aquatic environment, having regard in particular to natural variations in hydrological conditions. Where a discharge containing any substance listed is made to any river, lake or transitional, coastal or territorial water, samples shall be taken at a point sufficiently close to the discharge point to be representative of the quality of the aquatic environment in the area affected by the discharge. , Perchloroethylene,127-18-4,10,10, Azinphos-methyl,86-50-0,0.01,0.01, Demeton,8065-48-3,0.5,0.5, Omethoate,1113-02-6,0.01,Not determined, Triazophos,24017-47-8,0.005,0.005, 4-chloro-3-methyl-phenol,59-50-7,40,40, Bentazone,25057-89-0,500,500, Fenitrothion,122-14-5,0.01,0.01, 2-chlorophenol,95-57-8,50,50, Biphenyl,92-52-4,25,25, Malathion,121-75-5,0.01,0.02, 1,1,1-trichloroethane,71-55-6,100,100, Chloronitrotoluenes,89-60-1,10,10, Triphenyltin and its derivatives,379-52-2,0.02,0.008, 1,1,2-trichloroethane,79-00-5,400,300, Dichlorvos,95828-55-0,0.001,0.04 0.6 , Xylene,1330-20-7,30,30, ,Ecological quality ratio, High,0.97, Good,0.86, Moderate,0.75, Poor,0.63, Bad,< 0.63, ,Ecological quality ratio, High,0.85, Good,0.71, Moderate,0.57, Poor,0.47, Bad,< 0.47, ,Ecological quality ratio, High,0.93, Good,0.78, Moderate,0.52, Poor,0.26, Bad,< 0.26, ,Ecological quality ratio, High,0.80, Good,0.60, Moderate,0.40, Poor,0.20, Bad,< 0.20, (1) The term phytoplankton refers to solitary and colonial unicellular algae and cyanobacteria that live in the water column, at least for part of their lifecycle. , (2) “mid altitude” means ≥ 200 – 800 metres above sea level. , (3) “low altitude” means < 200 metres above mean sea level. , Boundary values for the degree to which the biomass of phytoplankton taxa (as represented by the annual mean chlorophyll a concentration) differ from the biomass of those phytoplankton taxa (annual mean chlorophyll a concentration) expected under reference conditions, ,Ecological quality ratio, Col 1,Col 2,Col 3,Col 4,Col 5,Col 6,Col 7,Col 8, Lake charac-teristics (ii),Marl, shallow; and high alkalinity, shallow. ,High alkalinity, very shallow.,Medium alkalinity, deep; medium alkalinity, shallow; low alkalinity, deep; and low alkalinity, shallow at mid-altitude. ,Medium alkalinity, very shallow.,Low alkalinity, shallow at low altitude & with < 75 % by area of the soils in the catchment being peat.,Low alkalinity, shallow at low altitude & with ≥ 75 % by area of the soils in the catchment being peat.,Low alkalinity, very shallow., High,0.55,0.63,0.50,0.63,0.50,0.50,0.63, Good,0.32,0.30,0.33,0.34,0.29,0.30,0.33, Moderate,0.16,0.15,0.165,0.17,0.145,0.15,0.165, Poor,0.05,0.05,0.05,0.06,0.05,0.05,0.05, Bad,< 0.05,< 0.05,< 0.05,< 0.06,< 0.05,< 0.05,< 0.05, Ecological quality ratio, Column 1,Column 2,Column 3,Column 4, Geological characteristics,High alkalinity,Moderate alkalinity,Low alkalinity, High,0.97,0.95,0.97, Good,0.82,0.77,0.82, Moderate,0.61,0.61,0.61, Poor,0.15,0.15,0.15, Bad,< 0.15,< 0.15,< 0.15, ,Ecological quality ratio, Column 1,Column 2,Column 3, ,Low alkalinity lakes,Moderate alkalinity lakes; high alkalinity lakes; and marl lakes, High,0.90,0.90, Good,0.63,0.66, Moderate,0.44,0.44, Poor,0.22,0.22, Bad,< 0.22,< 0.22, (1) The term “macrophyte” refers to larger plants, typically including flowering plants, mosses and larger algae, but not including single-celled phytoplankton or diatoms. , ,Ecological quality ratio, Column 1,Column 2, High,0.90, Good,0.68, Moderate,0.42, Poor,0.33, Bad,< 0.33, ,Ecological quality ratio,Vas Deferens Stage Index (VDSI), High,0.95,0.3, Good,0.33,4, Moderate,0.17,5, ,Ecological quality ratio, High,0.75, Good,0.64, Moderate,0.44, Poor,0.24, Bad,< 0.24, (1) The term “angiosperm” refers to flowering plants. In transitional waters and coastal waters, angiosperms include sea grasses and the flowering plants found in salt marshes, salt marsh tools have not yet been developed. , ,Ecological quality ratio, High,0.8, Good,0.6, Moderate,0.4, Poor,0.2, Bad,< 0.2, (1) The term “phytoplankton” refers to solitary and colonial unicellular algae and cyanobacteria that live in the water column, at least for part of their lifecycle. , ,Ecological quality ratio, High,0.8, Good,0.6, Moderate,0.4, Poor,0.2, Bad,< 0.2, ,Ecological quality ratio, High,0.8, Good,0.6, Moderate,0.4, Poor,0.2, Bad,< 0.2, (1) The term “macroalgae” refers to multicellular algae such as seaweeds and filamentous algae. , ,Ecological quality ratio, High,0.8, Good,0.6, Moderate,0.4, Poor,0.2, Bad,< 0.2, ,Ecological quality ratio, High,0.8, Good,0.6, Moderate,0.4, Poor,0.2, Bad,< 0.2, Saline or other intrusions into a groundwater body: Failure of a threshold value i.e. electrical conductivity for groundwater as derived in accordance with the Groundwater Regulations (Northern Ireland) 2009; or Other indications of intrusions of poor quality water into the body of groundwater (Note: “intrusion” is interpreted to be intrusion of poor quality water into a groundwater body from another water body, rather than the movement of a plume of poor quality water within the body). , Significant and sustained upward trend in electrical conductivity indicating saline intrusion; Significant and sustained upward trend in the concentration of other indicators of intrusion; Existing evidence that a point of abstraction has been rendered unsuitable for use without prior treatment as a result of an intrusion. , Surface water: a) Flow conditions in an associated surface water body are unsatisfactory, and there is reason to suspect that groundwater abstraction impacts (on the surface water body) are a significant component of the failure to achieve flow standards. (Note: Flow conditions are considered unsatisfactory if they are failing to meet the appropriate WFD flow standards and in doing so, preventing the surface water body maintaining of achieving its target status class). ,i) Flow conditions are preventing the surface water body maintaining or achieving the target status class and the reduction in river flow in the surface water body concerned (resulting solely from groundwater abstraction) represents ≥50% of the value of the allowable abstraction (based on the flow standards)., Groundwater Dependant Terrestrial Ecosystems (GWDTE): a) Indications of damage to a GWDTE caused by insufficient water availability identified through the departure from predefined environmental supporting conditions, including flow and groundwater level (or chemistry) which are required to maintain dependent communities in a favourable state. ,i) A significant proportion of the departure from the predefined environmental supporting conditions can be attributed to anthropogenic quantitative pressures in the groundwater body, affecting groundwater availability to the GWDTE., Water balance: a) Indications that the total annual volume of groundwater being abstracted from the groundwater body exceeds the long term annual average rate of recharge to the groundwater body (taking in to account an allowance where relevant for dependent ecosystems). ,i) The annual average volume of groundwater abstracted from the groundwater body represents more than 20% of the long-term annual average rate of recharge to the groundwater body and there are sustained trends of long term falling groundwater levels within the groundwater body., High,Blue, Good,Green, Moderate,Yellow, Poor,Orange, Bad,Red, Good and above,Equal green and light grey stripes,Equal green and dark grey stripes, Moderate,Equal yellow and light grey stripes,Equal yellow and dark grey stripes, Poor,Equal orange and light grey stripes,Equal orange and dark grey stripes, Bad,Equal red and light grey stripes,Equal red and dark grey stripes, Good,Blue, Failing to achieve good,Red, Good,Green, Poor,Red, Good,Green, Poor,Red,