Maintaining Water Quality 1 at temporary

Maintaining Water Quality. . . (1) at temporary events (2) and Private Distribution Networks Garry Boorman Principal Advisor, Public Health & Standards Ian Mitchell Water Regulations & Monitoring Manager

Where to start. . .

Where to start. . .

Where to start. . .

The Water Supply (Water Fittings) Regulations 1999 Replaced Water Byelaws Made 1 st April 1999 Laid before parliament 14 th April 1999 Enforceable 1 st July 1999 Section 74 Water Industry Act 1991 Water Industry Guide – guidance to schedule 2 of the Regulations (requirements for Water Fittings) Regulations are there to provide protection for the water supply from waste; misuse; undue consumption; erroneous measurement and most importantly contamination

Waste. . . Water escaping from defective pipes or fittings above or below ground whether seen or not seen.

Misuse. . . Water used for any other purpose than that for which it was legally supplied.

Undue consumption. . . Water used in excess of the quantity required for a specific purpose. (Jan 2001 20% reduction of the amount of water used for flushing new toilets)

Erroneous measurement. . . By-passing a water meter.

Contamination. . . The possible contamination of an internal or external water supply.

Risk Assessment. . . Backflow by • backsiphonage • back pressure Decide • level of risk (fluid category) • check for appropriate backflow device

Backflow Risk – Fluid Categories

Backflow Risk – Fluid Category 1 – Wholesome water, no backflow protection needed.

Backflow Risk – Fluid Category 2 – Aesthetic deterioration Examples: • Mixing of hot and cold water supplies • Stagnant water in redundant pipe work • Ice making machines • Domestic water softeners Install - Single check valve fitted.

Backflow Risk – Fluid Category 3 – Slight health risk Examples: • Water in domestic central heating systems • Domestic wash hand basins / baths • Domestic hose union taps • Domestic washing & dishwasher machines Install - Double check valve fitted.

Backflow Risk – Fluid Category 4 – Significant health risk Examples: • Water in non-domestic central heating systems • Printing and Photographic equipment • Commercial dishwashing equipment • Fire sprinkler systems using anti-freeze Install - Reduced Pressure Zone Valve.

Backflow Risk – Fluid Category 5 – Serious health risk Examples: • Grey / Rain water harvesting systems • Slaughter house equipment • Cattle drinking troughs • WC pans, urinals and bidets Install – Storage cistern with AA / AB air gap.

Contamination - Domestic Dead animals in cold water tank

Contamination - Agricultural Live animal in drinking trough (submerged ball valve)

Contamination - Industrial Cross connection causing contamination by industrial / horticultural fluids

Spot the contravention. . .

Spot the contravention. . .

Spot the contravention. . .

Spot the contravention. . .

Spot the contravention. . .

Spot the contravention. . .

Spot the contravention. . .

Failure to comply. . .

What went wrong?

Approved Materials

Temporary Drinking Water Supplies

Temporary Drinking Water Supplies It is suggested that guidance is made available to organisers of events where a temporary drinking water supply is required so that there is an understanding of the risks associated with supplying drinking water. Reference Document Guidelines for the Provision of Temporary Drinking Water Supplies at Events Water Health Partnership for Wales

Temporary Drinking Water Supplies It is suggested that guidance is made available to organisers of events where a temporary drinking water supply is required so that there is an understanding of the risks associated with supplying drinking water. Failure to properly plan for the provision of a safe source of drinking water can have significant consequences with the organisers o additional costs o notice and prosecution o high risk of an outbreak (campylobacter / E. coli O 157) o civil action if anyone becomes ill o loss of reputation and public reluctance to attend future events o poor media coverage

Temporary Drinking Water Supplies Event organisers must contact local authority Environmental Health and local Water Company if a public water supply connection is needed o in advance of the event at the earliest opportunity • if new connection required at least 12 (20) weeks notice • to existing connection at least 4 (8) weeks notice o submit plans • to show distribution network and infrastructure • direction of flow • location of pumps, incoming supply, toilet blocks, drinking water points, water food preparation areas, treatment and sampling points etc

Temporary Drinking Water Supplies Event organisers must. . . o undertake a risk assessment on water supply arrangements • identify potential risks that may cause contamination or an insufficient water supply • the measures to be taken to control / prevent these • the checks & monitoring procedures to ensure control measures are in place • the actions to be taken should the control measures fail

Temporary Drinking Water Supplies Event organisers must. . . o document their emergency operating plan for dealing with contamination or failure of water supply • close the event • contingency for emergency water supplies Organisers cannot rely on emergency supplies being provided by the local authority or water company Suggest that the event ‘Water Safety Plan’ is submitted to the local Environmental Health department at least 14 days in advance of the event

Temporary Drinking Water Supplies Commissioning of the water supply o storage and disinfection of distribution pipe-work • prior to use drained, stored off ground & end capped • segregated from fuel oils / contaminants • pipe material to be of approved materials (Regulation 31 Water Supply (Water Quality Regulations 2010) • laying, preparation & disinfection to be undertaken by appropriately trained and certified personnel • check microbiological samples required • formal ‘Certificate of Disinfection’ provided to local authority / water company

Temporary Drinking Water Supplies Water provision via tankers or bottled water The following British Standard has been issued to provide guidance on provision of safe drinking water to events where tankers or bottled water are used BS 8551: 2011 Provision and management of temporary water supplies and distribution networks (not including provisions for statutory emergencies) – Code of Practice Event organisers are strongly recommended to obtain a copy

Temporary Drinking Water Supplies Prevention of Contamination Event organisers must also ensure that the fixtures and fittings connected to the distribution pipe-work do not contaminate the water supply. Any connections made to the public water supply must comply with The Water Supply (Water Fittings) Regulations 1999 Guidance to regulations available via WRAS (http: //www. wras. co. uk/Regulations_guide. htm) Connections to public water supply must have backflow protection. Water Company Water Regulations Inspector may visit the site to check for compliance

Temporary Drinking Water Supplies During the Event Environmental Health Officers may undertake inspections and sample during the event

Temporary Drinking Water Supplies Further Recommendations of Good Practice • Do operational personnel hold valid National Water Hygiene cards? • Distribution pipe-work must not have been used for any other purpose • Locate any existing buried sewer, water pipes or electricity cables • Ensure that access to any water storage is controlled and restricted to unauthorised people • Consider location of fuel / paint stores (bunded? ) • If event in warm weather consider need to insulate water pipes • Label taps suitable for drinking water • Monitor chlorine residuals • If overland pipes used are these adequately protected from damage • Undertake regular inspections of drinking water taps to ensure they remain hygienic

Temporary Drinking Water Supplies

Private Distribution Networks Definitions • Distribution System Arrangement of assets (pipes, tanks, pumps) that convey a supply of wholesome water • Boundary / Bulk Meter This is the end point of the public network. The point at which a third party takes accountability for conveying a wholesome supply • Private Onward Distribution System Term used to describe a privately owned arrangement of assets used to deliver water to other premises. The PODS will be supplied via a Water Undertaker or Combined Licensee. The end of the public supply is defined by a bulk meter or tank

Private Distribution Networks Guidance from DWI – 25 th April 2013 http: //dwi. defra. gov. uk/stakeholders/guidance-and-codes-of-practice/ 2013 Private Distribution Systems

Private Distribution Networks Guidance from DWI – 25 th April 2013

Private Distribution Networks

Private Distribution Networks Examples of issues unlikely to be a Regulation 8 supply • caravan sites where there is a single owner of whole site • small industrial parks with several different businesses occupying individual units on one premises • hotel premises with outbuildings / marquee used for temporary events • airports / ports with single owner of whole site • university / college / school with single owner of whole site • rural estate where all buildings / homes are in the management or ownership of the estate The Water Company is responsible for monitoring and enforcing the Water Fittings Regulations 1999

Where to end. . .

Where to end. . . Alternative supply pipework (Spring Water) now disconnected Temporary 25 mm MDPE overland supply pipe. Installed following failure of private supply source.

Where to end. . .

Where to end. . .

Where to end. . . Cattle trough with type ‘AA’ air gap

Where to end. . . 25 mm MDPE pipe. Open ended pipe with no backflow protection Animal Faeces

Where to end. . . Outside hose union bib taps with no backflow protection

Where to end. . . Pre UV sample point – samples ‘passed’ Post UV sample point – samples ‘failed’ UV Disinfection Equipment

Contacts For any queries regarding Water Fittings Inspections • e-mail ‘water. regulations@severntrent. co. uk’ • phone 01332 683711 Or • Ian. Mitchell@severntrent. co. uk For any queries regarding temporary supplies or private distribution networks • Garry. Boorman@severntrent. co. uk Thank You for Listening