The Public Water Supplies (Scotland) Regulations 2014

[F1 PART A S Monitoring programmes

Textual Amendments

F1 Sch. 1A inserted (27.10.2017) by The Public Water Supplies (Scotland) Amendment Regulations 2017 (S.S.I. 2017/281), reg. 1(1), sch. 1 (as amended by The Public and Private Water Supplies (Miscellaneous Amendments) (Scotland) Regulations 2017 (S.S.I. 2017/321), regs. 1, 3(2))

1.   Each monitoring programme must— S

(a) verify that—

(i) the measures in place to control risks to human health throughout the water supply chain (from the catchment area through abstraction, treatment and storage to distribution) are working effectively; and

(ii) water at the point of compliance meets the water quality standards;

(b) provide information on the quality of water supplied to demonstrate that—

(i) the water quality standards are being met; and

(ii) the prescribed concentration or value for each parameter in Table C is not being exceeded at the point of monitoring for the parameter; and

(c) identify the most appropriate means of mitigating the risks to human health.

2.— (1) Each monitoring programme must fulfil the requirements of Part B of this schedule (and, where applicable, Part C of this schedule) by means of— S

(a) the collection and analysis of the quality of discrete water samples; or

(b) measurements of the quality of water recorded by a continuous monitoring process.

(2) In addition, monitoring programmes may consist of—

(a) inspections of records of the functionality and maintenance status of equipment; and

(b) inspections of the catchment area, water abstraction, treatment, storage and distribution infrastructure.

[F2 2A.— (1) Each monitoring programme must include an operational monitoring programme that— S

(a) takes into account any parameter, or micro-organism, parasite or substance, identified as relevant—

(i) by virtue of regulation 5(2), or

(ii) through a risk assessment under regulation 30,

(b) where appropriate, includes monitoring of parameters in accordance with sub-paragraphs (2) and (3), and

(c) confirms the effectiveness of all measures in place to control risks to human health throughout the water supply chain (from the catchment area through abstraction, treatment and storage to distribution).

(2) Except where turbidity is caused by iron and manganese in groundwater sources, the operational monitoring programme must include monitoring of the parameter turbidity at the treatment works in accordance with the reference values and frequencies in the following table—

Operational parameter	Reference value	Minimum frequency of sampling and analysis
Turbidity at the treatment works	0.3 NTU in 95% of samples and none to exceed 1 NTU	Volume (m3) of water distributed or produced each day within a supply zone
		> 0	≤ 1,000	Weekly
		> 1,000	≤ 10,000	Daily
		> 10,000		Continuous

(3) The operational monitoring programme must include monitoring of somatic coliphages in raw water in accordance with the following table—

Operational parameter	Reference value	Unit	Notes
Somatic coliphages	50 (for raw water)	PFU/100ml	This parameter must be measured if the risk assessment under regulation 30 indicates that it is appropriate to do so. If it is found in raw water at concentrations > 50 PFU/100ml, it must be analysed after steps of the treatment train in order to determine log removal by the barriers in place and to assess whether the risk of a breakthrough of pathogenic viruses is sufficiently under control.

(4) In this paragraph—

“NTU” means Nephelometric Turbidity Unit, and

“PFU” means Plaque Forming Unit.]

Textual Amendments

F2 Sch. 1A Pt. A para. 2A inserted (1.1.2023) by The Public Water Supplies (Scotland) Amendment Regulations 2022 (S.S.I. 2022/387), regs. 1(1), 17(2)(a)

3.   Scottish Water must ensure that each monitoring programme prepared by it is reviewed on a continuous basis, and updated or reconfirmed at least every [F3 6] years.] S

Textual Amendments

F3 Word in sch. 1A Pt. A para. 3 substituted (1.1.2023) by The Public Water Supplies (Scotland) Amendment Regulations 2022 (S.S.I. 2022/387), regs. 1(1), 17(2)(b)