Utility Mapping (PAS 128)

PAS 128 compliant underground utility mapping surveys for construction, development, and infrastructure projects across the UK

What Is PAS 128 Utility Mapping?

PAS 128 is the British Standards Institution (BSI) specification for the detection, verification, and location of underground utilities in the UK. It sets a recognised national standard for how utility surveys should be carried out and reported — giving clients, engineers, and contractors confidence in the accuracy of the subsurface data they receive.

Drain Alert carries out underground utility mapping surveys fully compliant with PAS 128, using a combination of Electromagnetic Location (EML) and Ground Penetrating Radar (GPR) technologies to detect buried services accurately. All findings are delivered as CAD drawings and a structured PAS 128 compliant report — ready for use by your design team.

Accurate utility mapping before excavation reduces the risk of utility strikes, protects your programme, and supports compliance with CDM Regulations 2015 pre-construction information requirements.

Who We Work With

Our PAS 128 utility mapping service is used by principal contractors, civil engineers, developers, local authorities, and infrastructure operators across the UK — for any project involving excavation or groundworks where buried utilities may be present.

PAS 128 compliant survey report

Documenting methodology, equipment, survey extent, and findings

CAD utility mapping drawing

Detected utility positions in DWG / DXF format – ready for your design team

Utility schedule

Structured summary of all utilities identified by type, depth, and confidence level

Desktop record documentation

Where applicable – utility records obtained from statutory undertakers

Discuss Your Utility Mapping Requirements

Contact Drain Alert today to discuss your project requirements. We will advise on the most appropriate PAS 128 survey type and provide a competitive quotation.

0800 616 222