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Wat 02 Water monitoring

Number of credits available	Minimum standards
1	Yes (criterion 1 only)

Aim

To ensure water consumption can be monitored and managed, and therefore encourage reductions.

Assessment criteria

The following is required to demonstrate compliance:

One credit

The specification of a water meter on the mains water supply to each building; this includes instances where water is supplied via a borehole or other private source.
Water-consuming plant or building areas, consuming 10% or more of the building’s total water demand, are either fitted with easily accessible sub-meters or have water monitoring equipment integral to the plant or area (see Compliance notes).
Each meter (main and sub) has a pulsed or other open protocol communication output to enable connection to an appropriate utility monitoring and management system, e.g. a building management system (BMS), for the monitoring of water consumption (see Relevant definitions).
If the site on which the building is located has an existing BMS, managed by the same occupier/owner (as the new building), the pulsed/digital water meter(s) for the new building must be connected to the existing BMS.

Checklists and tables

None.

Compliance notes

Ref	Terms	Description
Shell and core
CN1	Applicable assessment criteria	Criteria 1, 3 and 4 Both options: All criteria relevant to the building type and function apply. Criterion 2 Option 1 - Shell only: This criterion is not applicable. Option 2 - Shell and core: This criterion is applicable. Refer to Appendix D – BREEAM UK New Construction and Shell and Core Project Assessments for a more detailed description of the above shell and core assessment options.
CN1.1	Shell and core assessments	Option 2 - Shell and core Compliance with criterion 2 must be demonstrated for water-consuming plant/building areas identifiable by the developer (also see Relevant definitions). Water-consuming plant/building areas to be added/installed by the tenant do not need to be assessed for this issue.
CN1.2	Minimum standard for this issue	Option 1 - Shell only: the minimum standard will not be applied to shell only assessments. Option 2 - Shell and core: the minimum standard is applicable, however the assessor may, subject to their justification and evidence from the design team, seek for this to be reviewed on a ‘case by case’ basis.
Simple buildings
CN2	Applicable assessment criteria	Criterion 4 is not applicable. All other criteria relevant to the building type and function apply.
General
CN3	Water-consuming plant or building area See criterion 2.	As a minimum, this includes the following (where present): Buildings with a swimming pool and its associated changing facilities (toilets, showers etc.). On sites with multiple units or buildings, e.g. shopping centres, industrial units, retail parks etc. separate sub meters are fitted on the water supply to the following areas (where present): Each individual unit supplied with water Common areas (covering the supply to toilet blocks) Service areas (covering the supply to outlets within storage, delivery, waste disposal areas etc.) Ancillary/separate buildings to the main development with water supply. Laboratory: in any building with a laboratory or containing laboratories, a separate water meter is fitted on the water supply to any process or cooling loop for ‘plumbed-in’ laboratory process equipment. Healthcare: for sites with multiple departments, e.g. large health centres or acute hospitals, separate sub-meters are fitted on the supply to the following areas where present: Staff and public areas Clinical areas and wards Letting areas: on the water supply to each tenant unit Laundries Main production kitchen Hydrotherapy pools Laboratories CSSD/HSDU, pathology, pharmacy, mortuary and any other major process water use Supplementary supply of water from a cold water tank .
CN3.1	10% of water demand See criterion 2.	The sub-meter requirement does not necessarily apply in the following cases, where the assessor confirms there will be no additional monitoring benefit resulting from their installation: Where a building has only one or two small sources of water demand (e.g. an office with sanitary fittings and a small kitchen) Where the building has two sources of water demand, one significantly larger than the other, and the water consumption for the larger demand is likely to mask the smaller demand.
CN3.2	Extensions to existing buildings See criterion 4.	If no new water supply is being installed because the occupants of the extended building will use the facilities in, and therefore water supply to the existing building, then the following must be provided in the existing building; A water meter for the mains water supply Sub-meters for large water-consuming plant or facilities, e.g. evaporative cooling, swimming pool etc. (where present). The meters provided must have a pulsed output or connection to existing BMS in accordance with the assessment criteria.
CN3.3	No water supply to the building or unit	If there is no installed water supply to the assessed building because there will be no water-consuming fittings in the building, then in such instances the guidance given in the above Compliance note for extensions to existing building applies.

Methodology

None.

Evidence

Criteria	Interim design stage	Final post construction stage
All	One or more of the appropriate evidence types listed in The BREEAM evidential requirements section can be used to demonstrate compliance with these criteria.

Additional information

Relevant definitions

Staff areas: Refer to BREEAM issue Hea 01 Visual comfort.
Clinical areas: Refer to BREEAM issue Hea 01 Visual comfort.
Patient areas: Refer to BREEAM issue Hea 01 Visual comfort.
CSSD: Central Sterile Supply Department
HSDU: Hospital Sterilisation and Disinfection Unit

Meter outputs: Examples include pulsed outputs and other open protocol communication outputs, such as Modbus.
Utility monitoring and management system: Examples include automatic meter reading systems (AMR) and building energy management systems (BEMS). Automatic monitoring and targeting (aM&T) is an example of a management tool that includes automatic meter reading and data management.

Other information

None.