maintaining water quality ... (1) at temporary events (2) and private distribution networks

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

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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. - PowerPoint PPT Presentation

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Page 1: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Maintaining Water Quality ...(1) at temporary events

(2) and Private Distribution Networks

Garry BoormanGarry BoormanPrincipal Advisor, Public Health & StandardsPrincipal Advisor, Public Health & Standards

Ian MitchellIan MitchellWater Regulations & Monitoring ManagerWater Regulations & Monitoring Manager

Page 2: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to start ...

Page 3: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to start ...

Page 4: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to start ...

Page 5: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

The Water Supply (Water Fittings) Regulations 1999

Replaced Water Byelaws

Made 1st April 1999

Laid before parliament 14th April 1999

Enforceable 1st 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

Page 6: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Waste ...

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

Page 7: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Misuse ...

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

Page 8: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

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)

Page 9: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Erroneous measurement...

By-passing a water meter.

Page 10: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

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

water supply.

Page 11: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Risk Assessment...

Backflow by• backsiphonage• back pressure

Decide • level of risk (fluid category)• check for appropriate backflow device

Page 12: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Backflow Risk – Fluid Categories

Page 13: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Backflow Risk – Fluid Category 1

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

Page 14: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Backflow Risk – Fluid Category 2

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.

Page 15: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Backflow Risk – Fluid Category 3

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.

Page 16: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Backflow Risk – Fluid Category 4

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.

Page 17: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Backflow Risk – Fluid Category 5

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.

Page 18: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Contamination - Domestic

Dead animals in cold water tank

Page 19: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Contamination - Agricultural

Live animal in drinking trough (submerged ball valve)

Page 20: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Contamination - IndustrialCross connection causing contamination by industrial /

horticultural fluids

Page 21: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Spot the contravention ...

Page 22: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Spot the contravention ...

Page 23: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Spot the contravention ...

Page 24: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Spot the contravention ...

Page 25: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Spot the contravention ...

Page 26: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Spot the contravention ...

Page 27: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Spot the contravention ...

Page 28: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Failure to comply ...

Page 29: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

What went wrong?

Page 30: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Approved Materials

Page 31: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Temporary Drinking Water Supplies

Page 32: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

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 DocumentGuidelines for the Provision of Temporary Drinking Water Supplies at EventsWater Health Partnership for Wales

Page 33: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

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 watercan have significant consequences with the organisers

o additional costs

o notice and prosecution

o high risk of an outbreak (campylobacter / E.coli O157)

o civil action if anyone becomes ill

o loss of reputation and public reluctance to attend future events

o poor media coverage

Page 34: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

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 for food preparation areas,treatment and sampling points etc

Page 35: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Temporary Drinking Water Supplies

Event organisers must ...

o undertake a risk assessment on water supply arrangements• identify potential risks that may cause contamination or aninsufficient 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

Page 36: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

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

Page 37: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

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

Page 38: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Temporary Drinking Water Supplies

Water provision via tankers or bottled water

The following British Standard has been issued to provideguidance on provision of safe drinking water to events wheretankers or bottled water are used

BS8551:2011 Provision and management of temporary watersupplies and distribution networks (not including provisions forstatutory emergencies) – Code of Practice

Event organisers are strongly recommended to obtain a copy

Page 39: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Temporary Drinking Water Supplies

Prevention of Contamination

Event organisers must also ensure that the fixtures and fittingsconnected to the distribution pipe-work do not contaminate the water supply.

Any connections made to the public water supply must complywith 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 tocheck for compliance

Page 40: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Temporary Drinking Water Supplies

During the Event

Environmental Health Officers may undertake inspections and sample during the event

Page 41: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

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 ensurethey remain hygienic

Page 42: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Temporary Drinking Water Supplies

Page 43: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Private Distribution Networks

Definitions

• Distribution SystemArrangement of assets (pipes, tanks, pumps) that convey a supplyof wholesome water

• Boundary / Bulk MeterThis is the end point of the public network. The point at which a thirdparty takes accountability for conveying a wholesome supply

• Private Onward Distribution SystemTerm 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

Page 44: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Private Distribution Networks

Guidance from DWI – 25th April 2013

http://dwi.defra.gov.uk/stakeholders/guidance-and-codes-of-practice/

2013 Private Distribution Systems

Page 45: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Private Distribution Networks

Guidance from DWI – 25th April 2013

Page 46: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Private Distribution Networks

Page 47: Maintaining Water Quality ... (1) at temporary events (2) and 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 enforcingthe Water Fittings Regulations 1999

Page 48: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to end ...

Page 49: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to end ...

Temporary 25mm MDPE overland supply pipe. Installed following failure of private supply source.

Alternative supply pipework (Spring Water) now disconnected

Page 50: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to end ...

Page 51: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to end ...

Page 52: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to end ...

Cattle trough with type ‘AA’ air gap

Page 53: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to end ...

25mm MDPE pipe. Open ended pipe with no backflow protection

Animal Faeces

Page 54: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to end ...

Outside hose union bib taps with no backflow protection

Page 55: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Where to end ...

Post UV sample point – samples ‘failed’

Pre UV sample point – samples ‘passed’

UV Disinfection Equipment

Page 56: Maintaining Water Quality ... (1) at temporary events (2) and Private Distribution Networks

Contacts

For any queries regarding Water Fittings Inspections

• e-mail ‘[email protected]’• phone 01332 683711

Or• [email protected]

For any queries regarding temporary supplies or private distribution networks

[email protected]

Thank You for Listening