Driver Code | Driver Name | Objective | Description | Cat. | Scenario |
1 | 2 | 2+ | 3 | 4 |
DW1 | EC Directive 98/83/EC (the Drinking Water Directive) compliance with lead standard | DW1-1 | Do nothing | - | X | | | | |
DW1-2 | Compliance with 10£g/l standard for lead | 1 | | X | X | | |
DW1-3 | Compliance with 10£g/l standard + replace all lead communication pipes | 5 | | | | X | X |
DW2 | EC Directive 98/83/EC (the Drinking Water Directive) compliance with THM standard | DW2-1 | Do nothing | - | X | | | | |
DW2-2 | Install treatment to meet 100μg/l standard for total THMs | 1 | | X | X | X | |
DW2-3 | Upgrade treatment processes to remove the precursors for THM formation. | 5 | | | | | X |
DW3 | EC Directive 98/83/EC (the Drinking Water Directive) compliance with all other standards | DW3-1 | Do nothing except complete all existing undertakings. Note: it is assumed that the investment planned under Q+SII, together with the existing undertakings, will deliver compliance with the other standards in 98/83/EC | - | X | | | | |
DW3-2 | Upgrade assets to ensure that all assets will deliver compliance with the other standards in 98/83/EC | | | X | X | | |
DW3-3 | Upgrade assets to reduce the risk of non-compliance where the parametric mean is greater than 70% of the standard. | 5 | | | | X | |
DW3-4 | Upgrade assets to reduce the risk of non-compliance where the parametric mean is greater than 50% of the standard. | 5 | | | | | X |
DW4 | Cryptosporidium (Scottish Water) Directions 2003 | DW4-1 | Do nothing except complete all existing undertakings | - | X | | | | |
DW4-2 | Fully implement Cryptosporidium (Scottish Water) Directions 2003 | 4 | | X | X | X | |
DW4-3 | Fully implement 2003 Directions and upgrade all treatment works to provide a minimum of 3 Log crypto removal. | 5 | | | | | X |
DW5 | Directive 98/83/EC. The quality of the water put into supply must not be degraded by the condition of the distribution system. | DW5-1 | Do nothing | - | X | | | | |
DW5-2 | Compliance with the iron standard (200£g/l) and manganese standard (50£g/l) at customers taps. | 1 | | X | X | X | X |
DW6 | The Abstraction Directive | No require-ments identified | | | | | | | |
DW7 | The Birds Directive/The Habitats Directive | DW7-1 | Do nothing - except comply with all existing Water Order abstraction limits and impoundment conditions at sites affecting a Natura 2000 site. | - | X | | | | |
DW7-2 | Compliance with SEPA guidelines for drivers WR1 & WR2 at sites affecting a Natura 2000 site by 2007 | 2 | | X | X | X | X |
DW8 | Reduce reliance on mutual aid during emergencies( Note: objectives may change following security service inspection) | DW8-1 | Do nothing | - | X | | | | |
DW8-2 | Provide sufficient filling points for emergency tankers to cover worst case scenario. | 4 | | X | X | | |
DW8-3 | Provide engineering solutions to enable Scottish Water to manage up to 25% of worst case scenario without relying on mutual aid. | 5 | | | | X | X |
DW9 | Physical security arrangements to protect drinking water quality in accordance with Security Service guidance | DW9-1 | Do nothing | - | X | | | | |
DW9-2 | Provide "basic" security at all high risk sites and all toxic gas stores | 4 | | X | | | |
DW9-3 | Provide "basic" security at all sites | 5 | | | X | | |
DW9-4 | Provide "basic" security at all sites (incl. fire hydrants) | 5 | | | | X | X |
DW10 | Drinking Water Directive (98/83/EC). Water supplies from raw water aqueducts and raw water mains must comply with Directive standards | DW10-1 | Do nothing | - | X | | | | |
DW10-2 | Compliant water at point of use | 1 | | X | X | | |
DW10-3 | Compliant water at point of entry | 5 | | | | X | X |
DW11 | Prevention of backflow contamination from WWTW's | DW11-1 | Do nothing | - | X | | | | |
DW11-2 | Fit bylaw compliant measures to eliminate all backflow and backsiphonage risks from WWTW | 4 | | X | X | X | X |
DW12 | EC Directive 98/83/EC (the Drinking Water Directive) Compliance with tighter THM standard following review under Article 12. | DW12-1 | Do nothing | - | X | X | X | | |
DW12-2 | Upgrade treatment processes so that 50% of population receive water with a maximum THM concentration of <50 ug/l | 3 | | | | X | |
DW12-3 | Upgrade treatment processes so that all customers receive water with a maximum THM concentration of <50 ug/l | 3 | | | | | X |
DW13 | Improve the aesthetic quality of drinking water by meeting chlorine targets set by DWQR and customer service standards for colour | DW13-1 | Do nothing | - | X | X | | | |
DW13-2 | Improve control of disinfection processes at WTWs to achieve compliance with chlorine targets | 5 | | | X | | |
DW13-3 | As DW13-2 plus improve control of secondary disinfection processes at service reservoirs | 5 | | | | X | |
DW13-4 | As DW13-3 plus improve colour of drinking water so that maximum colour at customers' taps is 10Hazen | 6 | | | | | X |
DW14 | Extend provision of telemetry at works and service reservoirs | DW14-1 | Do nothing.Note: it is assumed that the investment in telemetry planned under Q+SII is fully delivered during the Q+SII period | - | X | X | X | | |
DW14-2 | Expand Q&S2 telemetry investment to cover operational and customer need | 5 | | | | X | |
DW14-3 | Full telemetry coverage of all works and service reservoirs | 5 | | | | | X |
DW15 | Compliance with recommendations from historical WQ reports | DW15-1 | Do nothing | - | X | X | | | |
DW15-2 | Full compliance with all historical recommendations | 5 | | | X | X | X |
DW16 | Water Safety Plans - managing microbial and chemical risks from source to tap | DW16-1 | Do nothing | - | X | X | | | |
DW16-2 | Develop a Water Safety Plan for all public drinking water supplies. | 3 | | | X | X | X |
DW17 | Removal of cross-connections between water mains and sewers | DW17-1 | Do nothing | - | X | X | | | |
DW17-2 | Identify position of all cross-connections and remove physical connections | 5 | | | X | X | X |
DW18 | Extend public water network at "unreasonable cost" to provide first time connection | DW18-1 | Do nothing | - | X | X | X | X | |
DW18-2 | Extend public network to include all households currently on a private water supply for which connection is currently deemed beyond "reasonable cost" | 5 | | | | | X |
DW19 | Provision of a wholesome supply of water sufficient for the domestic purposes as required by the Water (Scotland) Act 1980 | DW19-1 | Do nothing | - | X | X | X | | |
DW19-2 | Minimum resource failure to be 1 in 30 years | 4 | | | | X | |
DW19-3 | Minimum resource failure to be 1 in 50 years | 4 | | | | | X |
DW20 | New methods for calculating design rainfall depth require an increase in the spillway capacity of reservoirs | DW20-1 | Do nothing except rectify deficiencies discovered following statutory inspection under the Reservoirs Act | - | X | X | | | |
DW20-2 | Carry out Flood Study on a dam following its statutory inspection and carry out remedial works | 4 | | | X | | |
DW20-3 | Carry out flood study on all Category B dams and carry out remedial works | 4 | | | | X | |
DW20-4 | Carry out flood study on all Category B and C dams and carry out remedial works | 4 | | | | | X |
DW21 | Re-engineer critical raw water mains and distribution mains to provide Security of Supply | DW21-1 | Do nothing | - | X | X | X | | |
DW21-2 | Reduce maximum number of people affected by single failure event to 250,000 | 5 | | | | X | |
DW21-3 | Reduce maximum number of people affected by single failure event to 100,000 | 5 | | | | | X |
DW22 | Algae | DW22-1 | Do nothing | - | X | X | X | | |
DW22-2 | Provide treatment to address algae problems in raw water source | 5 | | | | X | X |
WR1 | Water Framework Directive (2000/60/EC)-Controls on Abstraction | WR1-1 | Do nothing | - | X | | | | |
WR1-2 | Compliance where the economic investment required is proportionate with the benefits of improvements | 1 | | X | X | X | |
WR1-3 | Compliance with the limits regardless of cost/benefit test | 2 | | | | | X |
WR2 | Water Framework Directive (2000/60/EC)- Controls on Impoundments. | WR2-1 | Do nothing | - | X | | | | |
WR2-2 | Compliance where the economic investment required is proportionate with the benefits of the improvements | 1 | | X | X | X | |
WR2-3 | Compliance with the limits regardless of cost/benefit test | 2 | | | | | X |
WR3 | Water Framework Directive (2000/60/EC)-Drinking Water Protected Areas. | WR3-1 | Do Nothing | - | X | | | | |
WR3-2 | Produce catchment protection plans for all sources of supply greater than 10m_/day or 50 people. | 1 | | X | X | X | X |
WR4 | Water Framework Directive (2000/60/EC)- Restoration of abandoned engineering works. | WR4-1 | Do nothing | - | X | | | | |
WR4-2 | Compliance where the economic investment required is proportionate with the benefits of the improvements | 1 | | X | X | X | |
WR4-3 | Compliance with the limits regardless of cost/benefit test | 2 | | | | | X |
WR5 | Water Framework Directive (2000/60/EC)- New licensing regimes for abstraction and impoundment. | WR5-1 | Do nothing | - | X | | | | |
WR5-2 | Compliance at all sites with abstractions >30 m 3/day | 1 | | X | X | | |
WR5-3 | Compliance for all identified sites | 2 | | | | X | X |