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State of the Environment Report 2010/2011 - Liverpool City Council

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PART 2 / <strong>State</strong> <strong>of</strong> <strong>the</strong><br />

<strong>Environment</strong><br />

79<br />

3. Water use and waterways<br />

Within <strong>the</strong> <strong>Liverpool</strong> LGA waterways are exposed to<br />

a range <strong>of</strong> pollutants from industrial and commercial<br />

premises, rural areas, roads, parks, gardens and<br />

households. In an urban area stormwater typically<br />

contains: litter, nutrients, bacteria, pathogens, pesticides,<br />

heavy metals, sediment, oils, grease and o<strong>the</strong>r pollutants.<br />

Rural run-<strong>of</strong>f can increase <strong>the</strong> levels <strong>of</strong> sediment,<br />

nutrients, pesticides and chemicals in waterways.<br />

All <strong>of</strong> <strong>the</strong>se pollutants can cause a decline in water<br />

quality, native plants and animals. The ability <strong>of</strong> a<br />

waterway to cope with increased nutrients, sediment and<br />

changes in flow is affected by <strong>the</strong> amount <strong>of</strong> vegetation<br />

cover, intensity <strong>of</strong> land use and <strong>the</strong> loss <strong>of</strong> vegetation<br />

along creek banks.<br />

<strong>Liverpool</strong> <strong>City</strong> <strong>Council</strong> ANNUAL REPORT

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