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Portsmouth Water Limited – AMP8 Service Reservoirs

Notice under regulation 28(4) of the Water Supply (Water Quality) Regulations 2016 (as amended)

Reference: PRT-2023-0006

Version Number: 1

Water undertaker as appointed under section 6 of the Water Industry Act 1991 (as amended): Portsmouth Water Limited, with registered number 02536455 (hereinafter called ‘the Company’).

Assets Affected:

Asset Name

Reference

Connected Supply System

Reference

Appledown Reservoir

RAPP

Chichester

WSP-CHI

Catherington Reservoir

RCAT

Lovedean

WSP-LOV

Clanfield Reservoir 1 & 2

RCL1 & RCL2

Lovedean

WSP-LOV

Firdown Reservoir 1 & 2

RFD1 & RFD2

Lovedean

WSP-FDR

Fort Southwick Reservoir

RFTS

Worlds End

WSP-WND

George Reservoir

RGEO

Worlds End

WSP-WND

Highdown Reservoir

RHDN

Chichester

WSP-CHI

Nelson Reservoir

RNEL

Hoads Hill

WSP-HSH

Racton Reservoir 1 & 2

RRC1 & RRC2

Walderton

WSP-WAL

Street End Reservoir 1

RSE1 & RSE2

Hoads Hill

WSP-HSH

Shedfield Reservoir 2

RSH2

Hoads Hill

WSP-HSH

West Meon Reservoir 2

RWM2

Hoads Hill

WSP-HSH

Whiteways Reservoir

RWWL

Bognor

WSP-BOG

Table 1: List of assets affected and associated reference numbers

Details of this Notice:

  1. The Drinking Water Inspectorate (‘the Inspectorate’) has received a regulation 28(1) report of the Water Supply (Water Quality) Regulations 2016 (as amended) (‘the Regulations’) from the Company dated 17 October 2023, which states that there is or has been a significant risk of supplying water from multiple reservoirs (and associated assets as applicable) that could constitute a potential danger to human health or could be unwholesome.
  2. Consequently, this Notice is served on the Company by the Inspectorate on behalf of the Secretary of State, under regulation 28(4) for the assets listed above, for risks associated with:

Description of Risk

Hazard/ Hazardous Event/ Parameter

Hazard I D

Establish measures that allow reservoirs to be effectively isolated from supply and recovered quickly with less risk to water quality, following parameter excursions

Total Coliforms

For example:

PRT/CHI/RAPP/R-IPA-1.1.18

Establish measures that allow reservoirs to be effectively isolated from supply and recovered quickly with less risk to water quality, following parameter excursions

E coli

For example:

PRT/CHI/RAPP/R-IPA-1.1.23

Establish measures that allow reservoirs to be effectively isolated from supply and recovered quickly with less risk to water quality, following parameter excursions

Enterococci

For example:

PRT/CHI/RAPP/R-IPA-1.1.24

Establish measures that allow reservoirs to be effectively isolated from supply and recovered quickly with less risk to water quality, following parameter excursions

Clostridium Perfringens

For example:

PRT/CHI/RAPP/R-IPA-1.2.3

Establish measures that allow reservoirs to be effectively isolated from supply and recovered quickly with less risk to water quality, following parameter excursions

Cryptosporidium

For example:

PRT/CHI/RAPP/R-IPA-1.3.1

Unplanned outage

No Supply

For example:

PRT/CHI/RAPP/R-IPA-1.3.49

Table 2: Table of the hazards, hazardous events, and/or parameters covered by this Notice, including the Hazard I D numbers and the description of risks.
  1. The Company are required to satisfy the following requirements.

The date given is that until or by which the requirements must be maintained or satisfied, as appropriate.

Requirements:

(a) To maintain the following measures for the period specified in each case:

  1. Maintain Service reservoir compliance sampling and downstream zonal compliance monitoring.
    Date: Ongoing for the duration of this Notice
  2. Maintain Service reservoir inspections according to a risk-based programme.
    Date: Ongoing for the duration of this Notice
  3. Maintain Service reservoir external inspections.
    Date: Ongoing for the duration of this Notice

(b) To review, revise or make operational the following measures, by the dates specified in each case:

  1. Complete the planning, design and procurement of reservoir recovery facilities at the Service reservoirs listed in this Notice.
    Date: 31 March 2028
  2. Complete the construction, installation, and commissioning of the reservoir recovery facilities at the Service reservoirs listed in this Notice. Commissioning must include the following to account for the changes made:
    Update the site operating manuals and procedures, as appropriate, following the installation of the reservoir recovery facilities under measure (b)1.
    Ensure all relevant staff are trained appropriately in the operation of the Service reservoir facilities installed under measure (b)1.

Date: 31 March 2030

(c) To audit whether the measures have been effective by the following means:

  1. Define an audit strategy to monitor the effectiveness of the measures specified in sections (a) and (b).
    Date: 31 March 2024
  2. Implement, and keep under continuous review, the audit strategy defined in measure (c)1.
    Date: Following completion of measure (c)1. onwards.

(d) Not to supply water for regulation 4(1) purposes from Service Reservoirs listed in assets affected, or not to so supply unless the specified conditions below are satisfied:

  1. Not Applicable

(e) To provide the following information in the time and manner specified below to enable monitoring of progress towards the mitigation of the risks:

  1. Provide a progress report annually.
    Date: by 31 January each year.
  2. Submit a report outlining the Company’s planning, design and procurement of the reservoir recovery facilities at the Service reservoirs, as defined by measure (b)1.
    Date: 30 April 2028
  3. Submit a report confirming the construction, installation, and commissioning into supply of the reservoir recovery facilities at the Service reservoirs, as defined by measure (b)1.
    Date: 30 April 2030
  4. Submit the audit strategy for auditing the effectiveness of the measures, as specified in measure (c)1.
    Date: 30 April 2024
  5. Submit any revisions of the audit strategy produced under measure (c)2.
    Date: Within 1 month of a revision
  6. Submit a report in the event that any completed measures of this Notice need to be altered in any way, for any reason.
    Date: Ongoing for the duration of this Notice
  7. Submit a satisfactory completion report accompanied by a revised regulation 28(1) report with Board level Director sign-off.
    Date: 30 April 2031

Further Details of this Notice:

  1. Any product or substance used as a result of the requirements in this Notice must comply with regulation 31.
  2. Under regulation 28(6) the Inspectorate, on behalf of the Secretary of State, may by notice served on the Company, revoke or vary this Notice.
  3. Failure by the Company to comply with this Notice may result in enforcement proceedings under section 18 of the Water Industry Act 1991 (as amended).

Signed

Nicholas Adjei
Deputy Chief Inspector, on behalf of the Secretary of State for Environment, Food and Rural Affairs
5 February 2024
Reference: PRT-2023-00006 v1

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