« Previous | Contents | Next »
Listen
ANNEX 8: SURFACE WATER QUALITY - ENVIRONMENTAL STANDARDS FOR SPECIFIC POLLUTANTS
Table 1: Environmental standards for 2,4-Dichlorophenoxyacetic acid (2,4-D)
'Good' standards for rivers and freshwater lochs | '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) |
0.3 | 1.3 | 0.3 | 1.3 |
Note to Table 1
The standards for 2,4-D specified in Column 2 and Column 4 of Table 1 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 2: Environmental standards for 2,4-Dichlorophenol
'Good' standard for rivers and freshwater lochs | 'Good' standard for transitional and coastal waters |
|---|
Column 1 | Column 2 |
|---|
Annual mean (µg/l) | Annual mean (µg/l) |
20 | 20 |
Table 3a: Environmental standards for total ammonia in freshwater lochs
'High' | 'Good' |
|---|
Column 1 | Column 2 | Column 3 | Column 4 |
|---|
Standard for lochs with: - an annual mean concentration of CaCO3 (mg/l) = 50; or
- an annual mean concentration of CaCO3 (mg/l) > 50 and = 200 and an altitude > 80 metres above mean sea level.
| Standard for lochs with: - an annual mean concentration of CaCO3 (mg/l) > 50 and = 200 and an altitude = 80 metres above mean sea level; or
- an annual mean concentration of CaCO3 (mg/l) > 50 and = 200
| Standard for lochs with: - an annual mean concentration of CaCO3 (mg/l) = 50; or
- an annual mean concentration of CaCO3 (mg/l) > 50 and = 200 and an altitude > 80 metres above mean sea level.
| Standard lochs with: - an annual mean concentration of CaCO3 (mg/l) > 50 and = 200 and an altitude = 80 metres above mean sea level; or
- an annual mean concentration of CaCO3 (mg/l) > 50 and = 200
|
90-percentile (milligrams of ammoniacal nitrogen per litre) |
0.2 | 0.3 | 0.3 | 0.6 |
Note to Table 3
The standards for total ammonium in rivers are specified in paragraph 3 and Table 3 of Part B of Schedule 1 of the 2007 Direction
Table 3b: Environmental standard for un-ionised ammonia in transitional and coastal waters
'Good' |
|---|
Annual mean (µg/l) |
21 |
Table 4: Environmental standards for arsenic
'Good' standard for rivers and freshwater lochs | 'Good' standard for transitional and coastal waters |
|---|
Column 1 | Column 2 |
|---|
Annual mean (µg/l) | Annual mean (µg/l) |
50 | 25 |
Table 5: Environmental standards for chlorine
'Good' standards for rivers and freshwater lochs | 'Good' standard for transitional and coastal waters |
|---|
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 |
Note to Table 5
The standard for chlorine specified in Column 2 of Table 5 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 6: Environmental standards for chromium VI
'Good' standard for rivers and freshwater lochs | 'Good' standards for transitional and coastal waters |
|---|
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 |
Note to Table 6
The standard for chromium VI specified in Column 3 of Table 6 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 7: Environmental standards for chromium III
'Good' standards for rivers and freshwater lochs |
|---|
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 |
Note to Table 7
The standard for chromium III specified in Column 2 of Table 7 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 8: Environmental standards for copper
Water hardness bands to which the corresponding river and freshwater loch standards in Column 2 apply | 'Good' standards for rivers and freshwater lochs | 'Good' standards for transitional and coastal waters |
|---|
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 - 10 | 1 | 5 |
> 10 - 50 | 6 |
> 50 - 100 | 10 |
> 100 | 28 |
Table 9: Environmental standards for cyanide
'Good' standards for rivers and freshwater lochs | 'Good' standards for transitional and coastal waters |
|---|
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 |
Note to Table 9
The standards for cyanide specified in Column 2 and Column 4 of Table 9 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 10: Environmental standards for cypermethrin
'Good' standards for rivers and freshwater lochs | 'Good' standards for transitional and coastal waters |
|---|
Column 1 | Column 2 | Column 3 | Column 4 |
|---|
Annual mean (ng/l) | 95-percentile (ng/l) | Annual mean (ng/l) | 95-percentile (ng/l) |
0.1 | 0.4 | 0.1 | 0.41 |
Note to Table 10
The standards for cypermethrin specified in Column 2 and Column 4 of Table 10 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 11: Environmental standards for diazinon
'Good' standards for rivers and freshwater lochs | '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 | 0.1 |
Note to Table 11
The standards for diazinon specified in Column 2 and Column 4 of Table 11 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 12: Environmental standards for dimethoate
'Good' standards for rivers and freshwater lochs | '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 |
Note to Table 12
The standards for dimethoate specified in Column 2 and Column 4 of Table 12 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 13: Environmental standards for iron
'Good' standard for rivers and freshwater lochs | '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 14: Environmental standards for linuron
'Good' standards for rivers and freshwater lochs | '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 |
Note to Table 14
The standards for linuron specified in Column 2 and Column 4 of Table 14 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 15: Environmental standards for mecoprop
'Good' standards for rivers and freshwater lochs | '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 |
Notes to Table 15
The standards for mecoprop specified in Column 2 and Column 4 of Table 15 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 16: Environmental standards for permethrin
'Good' standard for rivers and freshwater lochs | 'Good' standard for transitional and coastal waters |
|---|
Column 1 | Column 2 |
|---|
95-percentile (µg/l) | 95-percentile (µg/l) |
0.01 | 0.01 |
Table 17: Environmental standards for phenol
'Good' standards for rivers and freshwater lochs | '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 |
Note to Table 17
The standards for phenol specified in Column 2 and Column 4 of Table 17 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 18: Environmental standards for toluene
'Good' standards for rivers and freshwater lochs | '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) |
50 | 380 | 40 | 370 |
Note to Table 18
The standards for toluene specified in Column 2 and Column 4 of Table 18 shall not be used for the purpose of classifying the status of bodies of surface water.
Table 19: Environmental standards for zinc
Water hardness to which the corresponding river and freshwater loch standards in Column 2 apply* | 'Good' standards for rivers and freshwater lochs | 'Good' standards for transitional and coastal waters |
|---|
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 |
10 | 8 | 40 |
50 | 50 |
100 | 75 |
500 | 125 |
Note to Table 19
*The standards applicable to intermediate water hardness should be calculated by simple linear interpolation.
« Previous | Contents | Next »