| Cornwall Radon Gas Centre: Radon testing and mitigation of buildings and private water supplies, including design and installation of systems. Testing soil. Cornwall, England. |
| Gilleard Bird Hides: Manufacturers and erectors of bird hides, warden chalets, boardwalks, ramps and screens to RSPB, English Nature, National Trust, water companies, local authorities and the county. |
| Klargester Treatment Systems: Offer rainwater harvesting systems. Product and contact details. |
| SAP Ratings: Offer advice on SAP ratings a method of calculating the energy efficiency for homes. Contact details. |
| Sound Reduction Systems Ltd.: Range of building and architectural products to provide acoustic treatment within buildings. |
| Water Storage Development: Offers water tank refurbishment to comply with environmental laws. Contact details. |
| WCI Pollution Control: Specialising in sewage treatment schemes. Offering design and construction and installation of various treatment plants. Listing information on pollution control, design and consultancy services and reed beds. |
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