2A

Without prejudice to the generality of paragraph (2), each assessment carried out pursuant to that paragraph must—

a

seek to establish whether—

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 each point of compliance meets the water quality standards;

b

assess available information on the quality of water supplied to establish whether—

i

the water quality standards are being met; and

ii

the prescribed concentration and 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 any risk to human health.

2B

The assessment—

a

must be carried out in accordance with a method which is approved by the Drinking Water Quality Regulator for Scotland;

b

must be based on the general principles of risk assessment set out in relation to international standards including European standard EN 15975-2:2013 entitled “Security of drinking water supply - Guidelines for risk and crisis management - Part 2: Risk management”13; and

c

must take into account the results of monitoring carried out—

i

under these Regulations; and

ii

under section 8 (monitoring) of the Water Environment and Water Services (Scotland) Act 2003 in respect of bodies of water identified under section 6 of that Act (bodies of water used for the abstraction of drinking water).

6

Subject to paragraph (6A), Scottish Water must review and, where necessary, update each risk assessment at least every 5 years (or earlier if it considers that the existing risk assessment is inadequate for any reason).

6A

Scottish Water must review and, where necessary, update the risk assessment as soon as possible in the event that it becomes aware of any—

a

deterioration of the quality of the water;

b

increase in the pollution of a body of water or other source used for the abstraction of the water; or

c

modification to, or extension of, the combined system from which the water is supplied,

which is relevant for the protection of human health and was not previously taken into account.