Understanding when you can discharge surface water to a combined sewer is one of the most common questions we encounter in drainage design. The answer isn't always straightforward, but it's crucial to get it right to ensure your development meets planning requirements and environmental standards. Understanding Combined Sewers A combined sewer system carries both foul water (from toilets, sinks, and appliances) and surface water (rainwater from roofs, driveways, and roads) in

Sustainable Drainage Systems (SuDS) have evolved far beyond simple water management infrastructure. Today's most successful schemes demonstrate that drainage solutions can simultaneously control surface water, create valuable habitats for wildlife, and provide attractive amenity spaces for communities. This multifunctional approach represents the future of drainage design, delivering multiple benefits from a single intervention. The Triple Benefit Approach Traditional drainag

Groundwater is one of our most precious natural resources, supplying drinking water to millions of people across the UK. Yet it remains vulnerable to contamination from surface water runoff, particularly in areas where development increases impermeable surfaces. Sustainable Drainage Systems (SuDS) offer an effective solution, but only when designed with water quality protection at their core. Understanding the Risk to Groundwater When rainwater falls on roofs, roads, and car