fish. Chemical status, which compares the concentrations of various chemicals against known safe concentrations, is rated good or fail. Water quality of the River Itchen in 2019: References Ordnance Survey, 'Pathfinder' series 1:25000 map, sheet 977, Ordnance Survey, 'Landranger' series 1:50000 map, sheet 151 Warwickshire Railways, Leamington-Weedon line page External links Map sources for: (SP 390 576), (SP 415 652) and (SP 405 690). Rivers of Warwickshire Sites of Special Scientific Interest in Warwickshire 2Itchen