Report a pollution problem How to report bonfires, smells, light and other pollution. Bonfire guidelines What to consider before having a bonfire and alternatives to garden fires. River contamination Why river contamination occurs and how to report it. Contaminated land Find out more about ground contamination and how to make a request under the Environmental Information Regulations. Environmental permits You may need an environmental permit if you do an activity that could pollute the air, water or land, increase flood risk or adversely affect land drainage.