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Drinking Water Quality in Scotland 2005: Annual Report by the Drinking Water Quality Regulator

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Annex C

Authorised Departures

There are currently some public water supplies in Scotland that do not consistently meet the prescribed standard for one or more parameters. Under regulations 20 and 21 of the 2001 Regulations, Scottish Water may apply to the Scottish Ministers for an Authorised Departure from one or more of the prescribed standard(s) in respect of a specified water supply. Authorised Departures may not be granted for a period in excess of three years, nor where a breach of the prescribed standard could present a risk to human health. When Scottish Ministers authorise a Departure, a revised limit is set for the parameter(s) in question, and Scottish Water is under an obligation to secure compliance with the standard prescribed in the Regulations by the date specified in the Authorised Departure. Additional monitoring for those revised parameters, at frequencies in excess of those provided for in the Regulations, may also be agreed.

When applying for an Authorised Departure, Scottish Water must copy their application to every appropriate local authority, NHS board and the Water Industry Commission, all of whom have an opportunity to make representations on the Authorised Departure application. Once an application is granted, Scottish Water must publicise the Authorised Departure either by placing an advertisement in an appropriate local newspaper, or, in smaller supply zones, by notifying individual customers by post.

The DWQR monitors progress with the work undertaken by Scottish Water in order to comply with the terms of the Authorised Departure to ensure that it is on track to achieve compliance by the date specified. Should progress on the work give cause for concern, the DWQR may initiate enforcement action against Scottish Water.

In 2005, Authorised Departures were granted by Scottish Ministers in two Water Supply Zones, making a total of nine Departures in force at the end of 2005. Completion dates of a further two Departures were extended via the modification process provided in the Regulations.

Most of the supply zones with Authorised Departures are in the North West of Scotland and have relatively small populations, in many cases less than 20 people. The parameters for which Authorised Departures have been granted are shown in the table below. The table includes Departures which expired during 2005. Many zones with Authorised Departures have them for more than one parameter.

Parameter

No. of Zones with Authorised Departure for Parameter

THM

20

Colour

19

Iron

18

pH

3

Manganese

1

Many of these supplies are small upland sources which currently have no treatment other than chlorination. The solutions proposed include construction of the relevant treatment processes or, where practical, supplying the area from a neighbouring supply which is compliant with the Regulations.

Authorised Departures granted or modified in 2005 are listed below.

Water Supply Zone

Authorised Departure Parameters

Authorised Departure End Date

Comments

Dornie

Trihalomethanes ( THM)
Colour

Iron

30/06/2008

New Departure

Balmacara

Trihalomethanes ( THM)
Colour

30/06/2008

New Departure - Subsequently modified in 2006 for completion by June 2007

Laide

Trihalomethanes ( THM)
Colour
Iron

14/10/2007

Modified completion date agreed due to circumstances beyond Scottish Water control

Aultbea

Trihalomethanes ( THM)
Colour

14/10/2007

Modified completion date agreed due to circumstances beyond Scottish Water control

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Page updated: Monday, July 31, 2006