Contamination means the condition of land or water where any chemical substance or waste (a pollutant) has been added as a direct or indirect result of human activity and is present in concentrations above accepted background levels. Contamination can result from current or historic land uses. The presence of contaminated soil or water may indicate an adverse health or environmental impact. To ensure land is suitable for its current or intended use, it may require environmental assessment, management and/or remediation.