Environmental Standards for Specific Pollutants Environmental Standards for Specific Pollutants
Northern Ireland
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) |