Regulations 2(1), 7, 8, 17-26 and 28
SCHEDULE 1SPRESCRIBED CONCENTRATIONS AND VALUES
Table A SMicrobiological parameters
Part I: Directive requirements
(1)Item | (2)Parameters | (3)Concentration or Value (maximum) | (4)Units of Measurement |
---|---|---|---|
1. | Enterococci | 0 | number/100ml |
2. | Escherichia coli (E. coli) | 0 | number/100ml |
Part II: National requirements
(1)Item | (2)Parameters | (3)Concentration or Value (maximum) | (4)Units of Measurement |
---|---|---|---|
1. | Coliform bacteria | 0 | number/100ml |
Table B SChemical parameters
Part I: Directive requirements
(1)Item | (2)Parameters | (3)Concentration or Value (maximum) | (4)Units of Measurement |
---|---|---|---|
1. | Acrylamide(i) | 0.10 | µg/1 |
2. | Antimony | 5.0 | µgSb/l |
3. | Arsenic | 10 | µgAs/l |
4. | Benzene | 1.0 | µg/l |
5. | Benzo(a)pyrene | 0.010 | µg/l |
6. | Boron | 1.0 | mgB/l |
7. | Bromate | 10 | µgBrO3/l |
8. | Cadmium | 5.0 | µgCd/l |
9. | Chromium | 50 | µgCr/l |
10. | Copper | 2.0 | mg Cu/l |
11. | Cyanide | 50 | µgCN/l |
12. | 1,2 dichloroethane | 3.0 | µg/l |
13. | Epichlorohydrin(i) | 0.10 | µg/l |
14. | Fluoride | 1.5 | mg F/l |
15. | Lead | (a)25, from 3/7/06 until 24/12/13 | µgPb/l |
(b)10, from 25/12/13 | µgPb/l | ||
16. | Mercury | 1.0 | µgHg/l |
17. | Nickel | 20 | µgNi/l |
18. | Nitrate | 50 | mgNO3/l |
19. | Nitrite | 0.50 | mgNO2/l |
20. | Pesticides(ii)– | ||
Aldrin | 0.030 | µg/l | |
Dieldrin | 0.030 | µg/l | |
Heptachlor | 0.030 | µg/l | |
Heptachlor epoxide | 0.030 | µg/l | |
other pesticides | 0.10 | µg/l | |
21. | Pesticides: Total(iii) | 0.50 | µg/l |
22. | PAH(iv) | 0.10 | µg/l |
23. | Selenium | 10 | µgSe/l |
24. | Tetrachloroethene & Trichloroethene(v) | 10 | µg/l |
25. | THM: Total(vi) | 100 | µg/l |
26. | Vinyl chloride(i) | 0.50 | µg/l |
Notes:
(i)The parametric value 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. This is controlled by product specification.
(ii)See the definition of “pesticides and related products” in regulation 2(1). The parametric value applies to each individual pesticide.
(iii)“Pesticides: Total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring procedure.
(iv)“PAH” means Polycyclic Aromatic Hydrocarbons, the specified compounds being:
– benzo(b)fluoranthene
– benzo(k)fluoranthene
– benzo(ghi)perylene
– indeno(1,2,3–cd)pyrene.
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
(v)The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
(vi)“THM: Total” means total Trihalomethanes, the specified compounds being:
– chloroform
– bromoform
– dibromochloromethane
– bromodichloromethane.
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process.
Part II: National requirements
(1)Item | (2)Parameters | (3)Concentration or Value (maximum unless otherwise stated)) | (4)Units of Measurement |
---|---|---|---|
1. | Aluminium | 200 | µgA1/1 |
2. | Colour | 20 | mg/l Pt/Co |
3. | F1. . . | F1. . . | F1. . . |
4. | Iron | 200 | µgFe/l |
5. | Manganese | 50 | µgMn/l |
6. | F2. . . | F2. . . | F2. . . |
7. | Silver(i) | 10 | µg Ag/l |
8. | Sodium | 200 | mgNa/l |
9. | F3. . . | F3. . . | F3. . . |
10. | Tetrachloromethane | 3 | µg/l |
11. | Turbidity(ii) | 4 | NTU |
12. | Zinc | 5000 | µg Zn/l |
Textual Amendments
F1 Sch. 1 Table B Pt. 2 entry omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(a)(i)
F2 Sch. 1 Table B Pt. 2 entry omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(a)(ii)
F3Sch. 1 Table B Pt. 2 entry omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(a)(iii)
Notes:
(i)If Silver is used in a water treatment process, 80 may be substituted for 10.
(ii)Every effort should be made to achieve 1 NTU whenever possible.
Table C SIndicator parameters
Directive requirements
(1)Item | (2)Parameters | (3)Concentration or Value (maximum [F4unless otherwise stated]) or State | (4)Units of Measurement |
---|---|---|---|
1. | Ammonium | 0.50 | mgNH4/l |
2. | Chloride(i) | 250 | mgC1/1 |
3. | Clostridium perfringens (including spores) | 0 | Number/100 ml |
4. | Coliform bacteria | 0 | Number/100 ml |
5. | Colony count | No abnormal change | Number/1 ml at 22°C |
[F55A | Colour | Acceptable to consumers and no abnormal change] | |
6. | Conductivity(i) | 2500 | µS/cm at 20°C |
[F66A | Hydrogen ion | 9.5 6.5 (minimum) | pH value] |
[F66B | Odour | Acceptable to consumers and no abnormal change] | |
[F66C. | Radon (for radioactivity)(ii) | 100 | Bq/l] |
7. | Sulphate(i) | 250 | mgSO4/l |
[F77A | Taste | Acceptable to consumers and no abnormal change] | |
8. | Total indicative dose (for radioactivity)F8... | 0.10 | mSvF8... |
9. | Total organic carbon (TOC) | No abnormal change | mgC/l |
10. | Tritium (for radioactivity) [F9(iii)] | 100 | Bq/l |
[F1010A | Turbidity | Acceptable to consumers and no abnormal change] |
Textual Amendments
F4Words in Sch. 1 Table C inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(i)
F5Sch. 1 Table C entry inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(ii)
F6Sch. 1 Table C entry inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(iii)
F7Sch. 1 Table C entry inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(iv)
F8Words in Sch. 1 Table C omitted (28.11.2015) by virtue of The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(vi)
F9Word in Sch. 1 Table C inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(vii)
F10Sch. 1 Table C entry inserted (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(b)(v)
Notes:
(i)The water should not be aggressive.
[F11(ii)Remedial action is to be deemed justified on radiological protection grounds, without further consideration, where radon concentrations exceed 1,000 Bq/l.
(iii)If the concentration of tritium exceeds this value, an analysis of the presence of other artificial radionuclides must be also carried out by Scottish Water.]
Textual Amendments
F11Sch. 1 Table C Note (ii)(iii) substituted for Sch. 1 Table C Note (ii) (28.11.2015) by The Private and Public Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2015 (S.S.I. 2015/346), regs. 1(1), 8(c)
Table D SMicrobiological and Chemical Parameters: Type B Supplies
National Requirements
(1)Item | (2)Parameters | (3)Concentration or Value (maximum) | (4)Units of Measurement |
---|---|---|---|
1. | Coliform Bacteria | 0 | number/100ml |
2. | Conductivity (i) | 2500 | µS/cm at 20°C |
3. | Enterococci | 0 | number/100ml |
4. | Escherichia coli (E.coli) | 0 | number/100ml |
5. | Hydrogen ion | 9.5 6.5 (minimum) | pH value |
6. | Lead | (a)25, from 3/7/06 until 24/12/13 (b)10, from 25/12/13 | µgPb/l |
7. | Nitrate | 50 | mgNO3/l |
8. | Odour-qualitative | - | - |
9. | Taste-qualitative | - | - |
10. | Turbidity | 4 | NTU |
Notes:
(i)The water should not be aggressive.
Regulations 21-23, 29 and 30
SCHEDULE 2SPARAMETERS, MONITORING AND SAMPLING FREQUENCIES
Table AS
F12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Textual Amendments
F12Sch. 2 Table A omitted (27.10.2017) by virtue of The Water Intended for Human Consumption (Private Supplies) (Scotland) Regulations 2017 (S.S.I. 2017/282), reg. 1(1), Sch. 10 para. 2(d)(xi) (with reg. 2)
Table BS
F13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Textual Amendments
F13Sch. 2 Table B omitted (27.10.2017) by virtue of The Water Intended for Human Consumption (Private Supplies) (Scotland) Regulations 2017 (S.S.I. 2017/282), reg. 1(1), Sch. 10 para. 2(d)(xi) (with reg. 2)
Table CSRoutine Monitoring: Type B Supplies
Parameters
1. Coliform bacteriaS
2. ConductivityS
3. EnterococciS
4. Escherichia coli (E. coli)
5. Hydrogen ionS
6. LeadS
7. Nitrate(i)S
8. Odour – qualitative(ii)S
9. Taste – qualitative(ii)S
10. TurbidityS
Notes:
(i)Samples need not be analysed for nitrate if there are reasonable grounds for believing that nitrate levels in the locality concerned are below 25 mg NO3/l.
(ii)Samples should not be assessed qualitatively if there are reasonable grounds for suspecting that the water may give rise to a health hazard.
Regulation 21(2A)
F14SCHEDULE 2ASMONITORING OF RADIOACTIVE SUBSTANCES
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Textual Amendments
F14Sch. 2A omitted (27.10.2017) by virtue of The Water Intended for Human Consumption (Private Supplies) (Scotland) Regulations 2017 (S.S.I. 2017/282), reg. 1(1), Sch. 10 para. 2(d)(xii) (with reg. 2)
Regulation 26
F15SCHEDULE 3SCIRCUMSTANCES AND CONDITIONS TO BE CONSIDERED BY A MONITORING LOCAL AUTHORITY: DECISION ON AUDIT MONITORING
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Textual Amendments
F15Sch. 3 omitted (27.10.2017) by virtue of The Water Intended for Human Consumption (Private Supplies) (Scotland) Regulations 2017 (S.S.I. 2017/282), reg. 1(1), Sch. 10 para. 2(d)(xiii) (with reg. 2)
Regulations 16 and 26 and 27
SCHEDULE 4SREQUIREMENTS FOR RISK ASSESSMENT
—(1) When undertaking or reviewing and updating a risk assessment for the purposes of regulations F16... 27, a monitoring local authority shall do so in accordance with the provisions of this Schedule.S
(2) A risk assessment shall comprise the following–
(a)documentation on and a description of the private water supply, including the catchment from which the supply draws water;
(b)a hazard assessment and risk characterisation;
(c)an identification of the measures by which risks may be controlled; and
(d)establishment of verification procedures,
and for the purposes of this paragraph, “hazard” means a biological, chemical, physical or radiological agent that has the potential to cause harm or danger to human health; and “risk” means the likelihood of identified hazards causing harm in exposed populations in a specified time, including the magnitude of that harm and/or the consequences of such harm.
(3) In respect of a private water supply which comprises, either alone or in any combination thereof, catchments, surface water or ground water, the risk assessment shall include provision in relation to the relevant matters specified in Table A of this Schedule.
(4) In respect of a private water supply which receives treatment, including treatment at source and at any point thereafter, the risk assessment shall make provision in relation to the relevant matters specified in Table B of this Schedule.
(5) In respect of a private water supply which comprises intermediate tanks and distribution, the risk assessment shall include provision in relation to the relevant matters specified in Table C of this Schedule.
Table A
Hazard Information and Risk Characterisation
(1)Source of private water supply | (2)Information to be considered in the risk assessment |
---|---|
(1) Catchments | (i) geology and hydrology |
(ii) meteorology and weather patterns | |
(iii) general catchment and river health | |
(iv) wildlife | |
(v) competing water uses | |
(vi) nature and intensity of development and land use | |
(vii) other activities in the catchment that potentially release contaminants into source water | |
(viii) planned future activities | |
(2) Surface water | (i) description of water body type (e.g. river, reservoir, dam) |
(ii) flow and reliability of source water | |
(iii) retention times | |
(iv) water constituents (physical, chemical, microbial) | |
(v) protection (e.g. enclosures, access) | |
(vi) recreational and other human activity | |
(vii) bulk water transport | |
(3) Groundwater | (i) confined or unconfined aquifer |
(ii) aquifer hydrogeology | |
(iii) flow rate and direction | |
(iv) dilution characteristics | |
(v) recharge area | |
(vi) wellhead protection | |
(vii) depth of casing | |
(viii) bulk water transport |
Table B
Treatment: Hazard Identification and Risk Characterisation
(i) treatment processes |
(ii) equipment design |
(iii) monitoring equipment and automation |
(iv) water treatment chemicals used |
(v) treatment efficiencies |
(vi) disinfection removals of pathogens |
(vii) disinfection residuals/contact time |
Table C
Intermediate Tanks and Distribution: Hazard Identification and Risk Characterisation
(i) reservoir/tank design |
(ii) retention times |
(iii) seasonal variations |
(iv) protection (e.g. covers, enclosures, access) |
(v) distribution system design |
(vi) hydraulic conditions (e.g. water age, pressures, flows) |
(vii) backflow protection |
(viii) disinfectant residuals |
Textual Amendments
F16Words in Sch. 4(1) omitted (27.10.2017) by virtue of The Water Intended for Human Consumption (Private Supplies) (Scotland) Regulations 2017 (S.S.I. 2017/282), reg. 1(1), Sch. 10 para. 2(d)(xiv) (with reg. 2)
Regulations 22, 29 and 31
SCHEDULE 5SANALYTICAL METHODOLOGY
Table A
Parameters for which, subject to regulation 31(4), methods of analysis are prescribed
(1)Parameter | (2)Method |
---|---|
Clostridium perfringens (including spores) | Membrane filtration followed by anaerobic incubation of the membrane on m–CP agar(i) at 44 ± 1°C for 21 ± 3 hours. Count opaque yellow colonies that turn pink or red after exposure to ammonium hydroxide vapours for 20 to 30 seconds. |
Coliform bacteria | ISO 9308–1 |
Colony count 22°C – enumeration of culturable micro-organisms | prEN ISO 6222 |
Enterococci | ISO 7899–2 |
Escherichia coli (E.coli) | ISO 9308–1 |
(i)The composition of m–CP agar is:
Basal medium
Tryptose 30g Yeast extract 20g Sucrose 5g L–cysteine 1g MgSO4 . 7H2O 0.1g Bromocresol purple 40mg Agar 15g Water 1,000ml Dissolve the ingredients of the basal medium, adjust pH to 7.6 and autoclave at 121°C for 15 minutes. Allow the medium to cool and add:
D–cycloserine 400mg Polymyxine–B–sulphate 25mg Indoxyl–β-D-glucoside
to be dissolved in 8ml sterile water before addition
60mg Filter – sterilised 0.5% phenolphthalein disphosphate solution 20ml Filter – sterilised 4.5% FeC13 . 6H2O 2ml
Table B
Parameters in relation to which methods of analysis must satisfy prescribed characteristics
(1)Item No. | (2)Parameters | (3)Trueness % of prescribed concentration or value or specification | (4)Precision % of prescribed concentration or value or specification | (5)Limit of detection % of prescribed concentration or value or specification |
---|---|---|---|---|
1. | Aluminium | 10 | 10 | 10 |
2. | Ammonium | 10 | 10 | 10 |
3. | Antimony | 25 | 25 | 25 |
4. | Arsenic | 10 | 10 | 10 |
5. | Benzene | 25 | 25 | 25 |
6. | Benzo(a)pyrene | 25 | 25 | 25 |
7. | Boron | 10 | 10 | 10 |
8. | Bromate | 25 | 25 | 25 |
9. | Cadmium | 10 | 10 | 10 |
10. | Chloride | 10 | 10 | 10 |
11. | Chromium | 10 | 10 | 10 |
12. | Colour | 10 | 10 | 10 |
13. | Conductivity | 10 | 10 | 10 |
14. | Copper | 10 | 10 | 10 |
15. | Cyanide(i) | 10 | 10 | 10 |
16. | 1,2–dichloroethane | 25 | 25 | 25 |
17. | Fluoride | 10 | 10 | 10 |
18. | Iron | 10 | 10 | 10 |
19. | Lead | 10 | 10 | 10 |
20. | Manganese | 10 | 10 | 10 |
21. | Mercury | 20 | 10 | 20 |
22. | Nickel | 10 | 10 | 10 |
23. | Nitrate | 10 | 10 | 10 |
24. | Nitrite | 10 | 10 | 10 |
25. | Pesticides and related products(ii) | 25 | 25 | 25 |
26. | Polycyclic aromatic hydrocarbons(iii) | 25 | 25 | 25 |
27. | Selenium | 10 | 10 | 10 |
28. | Sodium | 10 | 10 | 10 |
29. | Sulphate | 10 | 10 | 10 |
30. | Tetrachloroethene(iv) | 25 | 25 | 10 |
31. | Tetrachloromethane | 20 | 20 | 20 |
32. | Trichloroethene(iv) | 25 | 25 | 10 |
33. | Trihalomethanes:Total(iii) | 25 | 25 | 10 |
34. | Turbidity(v) | 10 | 10 | 10 |
Notes:
(ii)The method of analysis should determine total cyanide in all forms.
(iii)The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned.
(iv)The performance characteristics apply to the individual substances specified at 25% of the parametric value in Table B in Schedule 1.
(v)The performance characteristics apply to the individual substances specified at 50% of the parametric value in Table B in Schedule 1.
(vi)The performance characteristics apply to the prescribed value of 4NTU.
Regulation 21(2A)
F17SCHEDULE 5ASMONITORING FOR TOTAL INDICATIVE DOSE AND ANALYTICAL PERFORMANCE CHARACTERISTICS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Textual Amendments
F17Sch. 5A omitted (27.10.2017) by virtue of The Water Intended for Human Consumption (Private Supplies) (Scotland) Regulations 2017 (S.S.I. 2017/282), reg. 1(1), Sch. 10 para. 2(d)(xv) (with reg. 2)