Types of Pollution Point Source: – You know EXACTLY where it’s coming from Ex. pipes leaking waste into ocean Ex. Factory leak into water Nonpoint Source: – You don’t know exact source; RUNOFF! Ex. Rainwater carrying waste to a stream
Dissolved Oxygen Oxygen in water for animals and plants A low level of oxygen is bad – Could be caused by eutrophication pH Good pH for water is 6.5-8.5 Too acidic can be harmful
Nitrates and Phosphates Nutrients and chemicals from agriculture (fertilizer) Too much can cause eutrophication!
Eutrophication Too many nutrients get into pond, cause algae to grow out of control Plants and animals die Bacteria decompose dead organisms, use up dissolved oxygen Eventually pond turns into a meadow
Bioindicator Can only live in certain water conditions If able to survive in certain water, that tells you the water is healthy Ex. Caddisfly larvae are sensitive to pollution, so if they are thriving, that tells you the water is healthy.
Water Treatment Plant Cleans water for human use