The River Taff is formed when the Taff Fechan meets the Taff Fawr. The river

then runs south and to Cardiff Bay.

'Photolibrary Wales photo library'

The Environment Agency samples the water at 3 locations in Cardiff

1. Tongwynlais, just north of

Cardiff

2. Llandaff Weir, on the west of the

city3. BlackWeir, near the city

centre

Image produced from the Ordnance Survey Get-a-map service. Image reproduced with kind permission of Ordnance Survey and Ordnance Survey of Northern Ireland.

Ammonia

Arsenic

Benzene

Boron

Cadmium

Calcium

Chloride

Chloroform

Chlorophyll

Chromium

Copper

Fluoride

Iron

Lead

Mercury Methabenzthiazuron

Magnesium

Manganese

Sodium

Naphthalene

Nickel

Nitrate

Nitrite

Oxygen

Orthophosphate

Phosphate

Vanadium

Zinc

They look at many different substances:

As well as taking some other measurements:

flow pH suspended solids salinity hardness

To analyse the data (using the instruction sheet) and present your findings in a PowerPoint presentation