SCHEDULE 1SUBSTITUTION OF TABLE B IN SCHEDULE 1 OF THE 2014 REGULATIONS
TABLE BCHEMICAL PARAMETERS
(1)
(2)
(3)
(4)
(5)
(6)
Item
Parameter
Concentrat-ion or value (maximum)
Units of measurement
Point of compliance
Notes
Part 1
1.
Acrylamide
0.10
μg/l
Consumer’s tap
Note 1
2.
Antimony
10
μgSb/l
Consumer’s tap
3.
Arsenic
10
μgAs/l
Consumer’s tap
4.
Benzene
1.0
μg/l
Consumer’s tap
5.
Benzo(a)pyrene
0.010
μg/l
Consumer’s tap
6.
Bisphenol A
2.5
μg/l
Consumer’s tap
7.
Boron
1.5
mgB/l
Consumer’s tap
Note 2
8.
Bromate
10
μgBrO3/l
Consumer’s tap
9.
Cadmium
5.0
μgCd/l
Consumer’s tap
10.
Chlorate
0.25
mg/l
Consumer’s tap
Note 3
11.
Chlorite
0.25
mg/l
Consumer’s tap
Note 3
12.
Chromium
50
μgCr/l
Consumer’s tap
13.
Copper
2.0
mgCu/l
Consumer’s tap
14.
Cyanide
50
μgCN/l
Consumer’s tap
15.
1,2-dichloroethane
3.0
μg/l
Consumer’s tap
16.
Epichlorohydrin
0.10
μg/l
Consumer’s tap
Note 1
17.
Fluoride
1.5
mgF/l
Consumer’s tap
18.
HAAs
60
μg/l
Consumer’s tap
Note 4
19.
Lead
10
μgPb/l
Consumer’s tap
20.
Mercury
1.0
μgHg/l
Consumer’s tap
21.
Microcystin-LR
1.0
μg/l
Consumer’s tap
Note 5
22.
Nickel
20
μgNi/l
Consumer’s tap
23.
Nitrate
50
mgNO3/l
Consumer’s tap
Note 6
24.
Nitrite
0.50
mgNO2/l
Consumer’s tap
Note 6
0.10
mgNO2/l
Treatment works
25.
Pesticides—
Aldrin
0.030
μg/l
Consumer’s tap
Dieldrin
0.030
μg/l
Consumer’s tap
Heptachlor
0.030
μg/l
Consumer’s tap
Heptachlor epoxide
0.030
μg/l
Consumers’ tap
Other pesticide
0.10
μg/l
Consumer’s tap
Note 7
26.
Pesticides: total
0.50
μg/l
Consumer’s tap
27.
Sum of PFAS
0.1
μg/l
Consumer’s tap
28.
PAH Total
0.10
μg/l
Consumer’s tap
29.
Selenium
20
μgSe/l
Consumer’s tap
Note 8
30.
Tetrachloroethene and trichloroethene
10
μg/l
Consumer’s tap
Note 9
31.
THM: Total
100
μg/l
Consumer’s tap
32.
Uranium
30
μg/l
Consumer’s tap
33.
Vinyl chloride
0.50
μg/l
Note 10
Part 2
34.
Aluminium
200
μgAl/l
Consumer’s tap
35.
Colour
20
mg/1 Pt/Co
Consumer’s tap
36.
Iron
200
μgFe/l
Consumer’s tap
37.
Manganese
50
μgMn/l
Consumer’s tap
38.
Sodium
200
mgNa/1
Consumer’s tap
39.
Tetrachlorometh-ane
3
μg/l
Consumer’s tap
40.
Turbidity
4
NTU
Consumer’s tap
Notes—
Note 1: The parametric value of 0.10 μg/l refers to the residual monomer concentration in the water as calculated according to specifications of the maximum release from the corresponding polymer in contact with the water.
Note 2: A parametric value of 2.4 mgB/l must be applied when desalinated water is the predominant water source of the supply system concerned or in regions where geological conditions could lead to high levels of boron in groundwater.
Note 3: A parametric value of 0.70 mg/l must be applied where a disinfection method that generates this parameter, in particular chlorine dioxide, is used for disinfection of water intended for human consumption. This parametric value applies only if such disinfection methods are used.
Note 4: This parameter must be measured only when disinfection methods that can generate HAAs are used for the disinfection of water intended for human consumption.
Note 5: This parameter must be measured only in the event of potential blooms in source water (increasing cyanobacterial cell density or bloom forming potential).
Note 6: See also regulation 4(2)(c).
Note 7: The corresponding parametric value applies to each “other pesticide” individually.
Note 8: A parametric value of 30 μg/l must be applied for regions where geological conditions could lead to high levels of selenium in groundwater.
Note 9: The sum of concentrations of these two parameters.
Note 10: The parametric value of 0.50 μg/l refers to the residual monomer concentration in the water as calculated according to specifications of the maximum release from the corresponding polymer in contact with the water.
SCHEDULE 2SUBSTITUTION OF TABLE C IN SCHEDULE 1 OF THE 2014 REGULATIONS
TABLE CIndicator Parameters
(1)
(2)
(3)
(4)
(5)
(6)
Item
Parameter
Concentration or value (maximum) or state
Units of measurement
Point of monitoring
Notes
Part 1
1.
Ammonium
0.50
mgNH4/1
Consumer’s tap
2.
Chloride
250
mgCl/1
Supply point
Note 3
3.
Clostridium perfringens (including spores)
0
Number/100ml
Supply point
Note 4
4.
Coliform bacteria
0
Number/100ml
Consumer’s tap
Note 5
5.
Colony count
No abnormal change
Number/1ml at 22°C
Consumer’s tap, service reservoir and treatment works
6.
Colour
Acceptable to consumers and no abnormal change
Consumer’s tap
7.
Conductivity
2500
μS/cm at 20°C
Supply point
Note 6
8.
Hydrogen ion
9.5
pH value
Consumer’s tap
Notes 6 and 7
6.5 (minimum)
9.
Odour
Acceptable to consumers and no abnormal change
Consumer’s tap
10.
Sulphate
250
mgSO4/l
Supply point
Note 3
11.
Taste
Acceptable to consumers and no abnormal change
Consumer’s tap
12.
Total organic carbon
No abnormal change
mgC/1
Supply point
Note 8
13.
Turbidity
1
NTU
Treatment works
Part 2
14.
Indicative dose
0.10
mSv
Supply point
15.
Radon
100
Bq/l
Supply point
Note 9
16.
Tritium
100
Bq/l
Supply point
Note 10
Notes—
Note 1: Water must not be aggressive or corrosive. This applies particularly to water undergoing treatment (demineralisation, softening, membrane treatment, reverse osmosis, etc.).
Note 2: Where water intended for human consumption is derived from treatment that significantly demineralises or softens water, calcium and magnesium salts could be added to condition the water in order to reduce any possible negative health impact, as well as to reduce the corrosiveness or aggressivity of water and to improve taste. Minimum concentrations of calcium and magnesium or total dissolved solids in softened or demineralised water could be established taking into account the characteristics of water that enters those processes.
Note 3: The water must not be corrosive.
Note 4: This parameter must be measured if a risk assessment under regulation 30(2) indicates that it is appropriate to do so.
Note 5: For water put into bottles or containers (which is not intended for sale for drinking by humans), the unit is number/250ml.
Note 6: The water must not be aggressive.
Note 7: For water put into bottles or containers (which is not intended for sale for drinking by humans), the minimum value is 4.5 pH units.
Note 8: This parameter need not be measured for supplies of less than 10,000 m³ a day.
Note 9: Remedial action is to be deemed justified on radiological protection grounds, without further consideration where radon concentrations exceed 1,000 Bq/l.
Note 10: If the concentration of tritium exceeds this value, an analysis of the presence of other artificial radionuclides must also be carried out by Scottish Water.
SCHEDULE 3SUBSTITUTION OF TABLE 1 IN SCHEDULE 3 OF THE 2014 REGULATIONS
Minimum performance characteristic: uncertainty of measurement
Parameter
Uncertainty of measurement (% of prescribed concentration or value, except pH) (Note 1)
Notes
Aluminium
25
Ammonium
40
Acrylamide
30
Antimony
40
Arsenic
30
Benzo(a)pyrene
50
Note 2
Benzene
40
Bisphenol A
50
Boron
25
Bromate
40
Cadmium
25
Chloride
15
Chlorate
40
Chlorite
40
Chromium
30
Conductivity
20
Copper
25
Cyanide
30
Note 3
1,2-dichloroethane
40
Epichlorohydrin
30
Fluoride
20
HAAs
50
Hydrogen ion concentration (in pH)
0.20
Note 4
Iron
30
Lead
30
Manganese
30
Mercury
30
Microcystin-LR
30
Nickel
25
Nitrate
15
Nitrite
20
Oxidisability
50
Note 5
Pesticides
30
Note 6
PFAS
50
Polycyclic aromatic hydrocarbons
40
Note 7
Selenium
40
Sodium
15
Sulphate
15
Tetrachloroethene
40
Note 8
Trichloroethene
40
Note 8
Trihalomethanes – total
40
Note 7
Total organic carbon
30
Note 9
Turbidity
30
Note 10
Uranium
30
Vinyl chloride
50
Notes—
Note 1: Uncertainty of measurement is a non-negative parameter characterising the dispersion of the quantity values being attributed to a measurand, based on the information used. The performance criterion for measurement uncertainty (k = 2) is the percentage of the parametric value stated in the table or any stricter value. The uncertainty of measurement must be estimated at the level of the parametric value, unless otherwise specified.
Note 2: If the value of uncertainty of measurement cannot be met, the best available technique must be selected (up to 60%).
Note 3: The method determines total cyanide in all forms.
Note 4: The value for the uncertainty of measurement is expressed in pH units.
Note 5: Reference method European standard EN ISO 8467:1995 entitled “Water quality - Determination of permanganate index (ISO 8467:1993)”11.
Note 6: The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30 % can be achieved for several pesticides, higher values up to 80% may be allowed for a number of pesticides.
Note 7: The performance characteristics apply to individual substances, specified at 25% of the prescribed concentration or value for the corresponding parameter in Table B.
Note 8: The performance characteristics apply to individual substances, specified at 50% of the prescribed concentration or value for the corresponding parameter in Table B.
Note 9: The uncertainty of measurement must be estimated at the level of 3 mg/l of the total organic carbon in accordance with European standard EN 1484:1997 entitled “Water analysis - Guidelines for the determination of total organic carbon and dissolved organic carbon”12.
Note 10: The uncertainty of measurement must be estimated at the level of 1.0 nephelometric turbidity units in accordance with European standard EN ISO 7027-1:2016 entitled “Water quality - Determination of turbidity - Part 1: Quantitative methods (ISO 7027-1:2016)”13 or another equivalent standard method.