# data[].attributes.body
Type: Waste Heat (point source)

Effect: Raises Temperature, lower O2, kills fish

Risk: Low, well regulated by the Integrated Pollution Prevention and control directive.

Measurement: DO, T, upstream/downstream, sampling every hour

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Type: polluted waste waters

Effect: can change ph of water, add toxic chemicals to water, kills fish

Risk: medium, rules of dilution of polluting water but not strict enough to prevent pollution

Measurement: measure ph levels and take samples of upstream compared to downstream pollution levels

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Type: fertilizer runoff (diffuse source)

Effect :increases nutrients like nitrates in water leads to eutrophication which in turn reduces dissolved oxygen as the algae consume it

Risk: high up to farmers to control their use

Measurement: Biochemical oxygen demand

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farms fertiliser washes into river causing eutrophication, also changes environment which may be harmful for aquatic life

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Type: Slurry, silage liquor, yard washings, nutrients (fertilisers)

Effect: highly toxic to aquatic life

Risk: Relatively high, not largely regulated

Measurement: upstream/downstream sampling

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Leaching of metals

Can be acidifying

Kills wildlife within rivers due to higher pH

Measurement, measure pH of river and metal concentration

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Type: synthesised organic chemicals

Effect: persistent organic pollutants, leads to bioaccumulation in the food chain

Risk: medium

Measurement: pH tests

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Type: sewage overflow into river (potentially multiple sources, storm drains etc.)

Effect: Bacteria decomposing organic material, greatly lowers O2 and kills aquatic life

Risk: Medium to high: sewage outflows regulated by Ofwat but may still happen regularly depending on infrastructure

Measurements: DO, work out BOD

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impermeable man made surface leading to increased surface runoff, can flood rivers and town

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Type: continuous or intermittent sewage discharge

effect: big BOD leading to a reduction in DO, may lead to eutrophication and a reduction in biodiversty

Risk: High

Measurement: BOD and DO measurements, biodiversity sampling

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Type: Organic waste

Effect: high nitrate level

Risk: High

Measurement: upstream and downstream sampling

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Type: organic material, inorganic salts + sediments

Effect: sheep glazing upstream can cause erosion, leading to coloration and humic change. Increased pH levels may affect biodiversity and/or kill species.

Risk: Medium, if sheep farming/glazing done strategically.

Measurement: colour, turbidity, taste, ammonia, pH

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Type: Ammonia, Radioactivity, chemical/biological agents, trace metals, synthetic organic chemicals.

Effect: pH change, lack of buffer, reduced biodiversity, killing of sensetive species, reduced photosynthesis or increased oxygen demand, algal blooms.

Risk: High, especially if flooded or surfaced.

Measurement: colour, conductivity, BOD, DO, odour, taste, turbidity, temp, ammonia and nitrate