# The Water Framework Directive (Classification, Priority Substances and Shellfish Waters) Regulations (Northern Ireland) 2015, Environmental Standards for Specific Pollutants

Extent: N.I.

Table 18
Environmental standards for 2,4-Dichlorophenoxyacetic acid (2,4-D)
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.
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
Column 1
Column 21
Column 3
Column 41
Annual mean (µg/l)
95-percentile (µg/l)
Annual mean (µg/l)
95-percentile (µg/l)
0.3
1.3
0.3
1.3
Table 19
Environmental standards for 2,4-Dichlorophenol
Good standard for rivers and freshwater lakes
Good standard for transitional and coastal waters
Column 1
Column 2
Column 3
Column 4
Annual mean (µg/l)
95-percentile (µg/l)
Annual mean (µg/l)
95-percentile (µg/l)
4.2
140
0.42
6
Table 20
Environmental standards for 3,4-Dichloroaniline
Good standard for rivers and freshwater lakes
Good standard for transitional and coastal waters
Column 1
Column 2
Column 3
Column 4
Annual mean (µg/l)
95-percentile (µg/l)
Annual mean (µg/l)
95-percentile (µg/l)
0.2
5.4
0.2
5.4
Table 21
Environmental standards for arsenic (dissolved)
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
Good standard for rivers and freshwater lakes
Good standard for transitional and coastal waters
Column 11
Column 21
Annual mean (µg/l)
Annual mean (µg/l)
50
25
Table 22
Environmental standards for benzyl butyl phthalate
Good standard for rivers and freshwater lakes
Good standard for transitional and coastal waters
Column 1
Column 2
Column 1
Column 2
Annual mean (µg/l)
95-percentile (µg/l)
Annual mean (µg/l)
95-percentile (µg/l)
7.5
51
0.75
10
Table 23
Environmental standards for carbendazim
Good standards for rivers and freshwater lakes
Column 1
Column 2
Annual mean (µg/l)
95-percentile (µg/l)
0.15
0.7
Table 24
Environmental standards for chlorine
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.
Good standards for rivers and freshwater lakes
Good standard for transitional and coastal waters
Column 1
Column 21
Column 31
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 oxidant2
2
5
10
Table 25
Environmental standards for chlorothalonil
Good standards for rivers and freshwater lakes
Column 1
Column 2
Annual mean (µg/l)
95-percentile (µg/l)
0.035
1.2
Table 26
Environmental standards for chromium III
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
Good standards for rivers and freshwater lakes
Column 1
Column 21
Annual mean concentration (µg/l) of dissolved chromium III
95-percentile concentration (µg/l) of dissolved chromium III
4.7
32
Table 27
Environmental standards for chromium VI
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.
Good standard for rivers and freshwater lakes
Good standards for transitional and coastal waters
Column 1
Column 2
Column 31
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
Table 28
Environmental standards for copper
1 bioavailable means the fraction of the dissolved concentration of copper likely to result in toxic effects as determined using the Metal Bioavailability Assessment Tool (also referred to as a PNEC Estimator) for copper.
2 The recommended salt water standard applies to the fraction of a water sample that passes through a 0.45-µm filter or that is obtained by any equivalent pre-treatment.
3 “DOC” means the annual mean concentration of dissolved organic carbon in mg/l.
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters2
Column 2
Column 3
Annual mean concentration (µg/l) of dissolved copper
Annual mean concentration (µg/l) of dissolved copper
1(bioavailable)1
3.76 µg/l dissolved, where DOC3 ≤ 1 mg/l
3.76 +(2.677 × ((DOC/2) - 0.5)) µg/l dissolved, where DOC > 1 mg/l
Table 29
Environmental standards for cyanide
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.
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
Column 1
Column 21
Column 3
Column 41
Annual mean concentration (µg/l) of ‘free’ cyanide (HCN and CN)
95-percentile concentration (µg/l) of ‘free’cyanide (HCN and CN)
Annual mean concentration (µg/l) of hydrogen cyanide
95-percentile concentration (µg/l) of hydrogen cyanide
1
5
1
5
Table 30
Environmental standards for cypermethrin
1 Cypermethrin ceases to be a specific pollutant from 22 December 2018, when it shall be listed as a priority substance.
2 The standards for cypermethrin specified in column 2 and column 4 must not be used for the purposes of classifying the ecological status or potential of bodies of surface water.
Good standards for rivers and freshwater lakes12
Good standards for transitional and coastal waters12
Column 1
Column 2
Column 3
Column 4
Annual mean (µg/l)
95-percentile (µg/l)
Annual mean (µg/l)
95-percentile (µg/l)
0.1
0.4
0.1
0.41
Table 31
Environmental standards for diazinon
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
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
0.26
Table 32
Environmental standards for dimethoate
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
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
Table 33
Environmental standards for glyhosate
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
Column 1
Column 2
Column 3
Column 4
Annual mean (µg/l)
95-percentile (µg/l)
Annual mean (µg/l)
95-percentile (µg/l)
196
398
196
398
Table 34
Environmental standards for iron
Good standard for rivers and freshwater lakes
Good standard for transitional and coastal waters
Column 1
Column 2
Annual mean concentration (mg/l) of dissolved iron
Annual mean concentration (mg/l) of dissolved iron
1
1
Table 35
Environmental standards for linuron
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
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
Table 36
Environmental standards for manganese
1 bioavailable means the fraction of the dissolved concentration of manganese likely to result in toxic effects as determined in accordance with the Metal Bioavailability Assessment Tool for manganese.
Good standard for rivers and freshwater lakes
Annual mean (µg/l) bioavailable
1231
Table 37
Environmental standards for mecoprop
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
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
Table 38
Environmental standards for methiocarb
Good standards for rivers and freshwater lakes
Column 1
Column 2
Annual mean (µg/l)
95-percentile (µg/l)
0.01
0.77
Table 39
Environmental standards for pendimethalin
Good standards for rivers and freshwater lakes
Column 1
Column 2
Annual mean (µg/l)
95-percentile (µg/l)
0.3
0.58
Table 40
Environmental standards for permethrin
Good standard for rivers and freshwater lakes
Good standard for transitional and coastal waters
Column 1
Column 2
Column 3
Column 4
Annual mean (µg/l)
95-percentile (µg/l)
Annual mean (µg/l)
95-percentile (µg/l)
0.001
0.01
0.0002
0.001
Table 41
Environmental standards for phenol
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
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
Table 42
Environmental standards for tetrachloroethane (TCE)
Good standards for rivers and freshwater lakes
Column 1
Column 2
Annual mean (µg/l)
95-percentile (µg/l)
140
1848
Table 43
Environmental standards for toluene
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
Column 1
Column 2
Column 3
Column 4
Annual mean (µg/l)
95-percentile (µg/l)
Annual mean (µg/l)
95-percentile (µg/l)
74
380
74
370
Table 44
Environmental standards for triclosan
Good standard for rivers and freshwater lakes
Good standard for transitional and coastal waters
Column 1
Column 2
Column 3
Column 4
Annual mean (µg/l)
95-percentile (µg/l)
Annual mean (µg/l)
95-percentile (µg/l)
0.1
0.28
0.1
0.28
Table 45
Environmental standards for un-ionised ammonia as nitrogen
Good standard for rivers and freshwater lakes
Good standard for transitional and coastal waters
Annual mean (µg/l)
Annual mean (µg/l)
Not applicable
21
Table 46
Environmental standards for zinc
1 bioavailable means the fraction of the dissolved concentration of zinc likely to result in toxic effects as determined using the Metal Bioavailability Assessment Tool (also referred to as a PNEC Estimator) for zinc.
2 Ambient Background Concentration is an estimate of background levels of zinc based on a low percentile of monitoring data. A figure of 1 µg/l has been estimated for freshwaters in Northern Ireland.
Good standards for rivers and freshwater lakes
Good standards for transitional and coastal waters
Column 1
Column 2
Annual mean
Annual mean
10.9 bioavailable1 plus Ambient Background Concentration2 (µg/l) dissolved
6.8 dissolved plus Ambient Background Concentration (µg/l)

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Source: https://www.legislation.gov.uk/nisr/2015/351/schedule/1/part/2/crossheading/4-environmental-standards-for-specific-pollutants (the official version)
Page: https://openlegislation.uk/water-framework-directive-classification-priority-substances-and-shellfish-waters-regulations-northern-ireland-2015/schedule-1/part-2/crossheading-4-environmental-standards-for-specific-pollutants
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.