Ock
Millpond on the Ock near Great Enton
Location
Country	England
County	Surrey
District	Waverley
Physical characteristics
Source
• location	various in Waverley (borough), Surrey
Mouth	River Wey
• location	Godalming
Length	7.5 km (4.7 mi)
Basin size	26.4 km2 (10.2 sq mi)
Basin features
River system	Wey catchment
Tributaries
• left	indistinct (long headwaters in local terms being unnamed)
• right	Busbridge stream and indistinct number (long headwaters in local terms being unnamed)

The River Ock is a tributary of the River Wey in Surrey, England.^[1]

The river has two great sources in the west of Hambledon and two similar sources in the east of the parish of Witley.^[2][3] The coalescence is north of a zone of gently north-sloping land forming Wheelerstreet, Enton Green and the little manor of Tuesley. For centuries the latter comprised a very modest house and farmstead, dwarfed by the adjacent Busbridge Park, the stream of which drains Busbridge Lakes, the former mid and lower fish ponds, the upper one having been drained on becoming part of that stream.

The resulting Ock passes through Ockford, sometimes considered the east of Ockford Ridge,^[4] then parts of Godalming, before joining the Wey in the town centre.

The Portsmouth Main Line railway follows much of the course.

The Old Mill in Godalming, originally known as Hatch Mill, made use of the force and speed of the multi-hill-draining river. Rake Mill at Witley, a former fulling mill, was used by the artist Neville Lytton as a studio. The building, along with most of Lytton's sketches and paintings, was destroyed by a fire in 1902.^[5] Other mills on the Ock were a tannery in Godalming, a corn mill at Enton and a flour mill at Ockford.

The Environment Agency measure water quality of the rivers in England. Each is given an overall ecological status, which may be one of five levels: high, good, moderate, poor and bad. There are several components that are used to determine this, including biological status, which looks at the quantity and varieties of invertebrates, angiosperms and fish. Chemical status, which compares the concentrations of various chemicals against known safe concentrations, is rated good or fail.^[6]

The water quality of the Ock was as follows in 2019:

• River Ock mills

v t e Surrey Hills National Landscape
North Downs	Botley Hill Box Hill Colley Hill Combe Bottom Gatton Park Hackhurst and White Downs Hog's Back Mole Gap to Reigate Escarpment Newlands Corner Norbury Park Ranmore Common Seale Chalk Pit Woldingham and Oxted Downs
Greensand Ridge	Albury Heath Blackheath Common Colyers Hanger Devil's Jumps Devil's Punch Bowl Frensham Common Gibbet Hill Gong Hill Hankley Common Hankley Farm Holmbury Hill Leith Hill Moor Park Oxmoor Copse Puttenham and Crooksbury Commons St Martha's Hill Stockstone Quarry Thursley Common Winterfold Forest Witley Common Wotton Common
Low Weald	Brook Brick Pit Chiddingfold Forest Netherside Stream Outcrops
Rivers	Law Brook Mole Ock Pipp Brook Tillingbourne Wey
Lakes and ponds	Busbridge Lakes Frensham Ponds Silent Pool
Long-distance paths	Downs Link Greensand Way Mole Gap Trail North Downs Way Thames Down Link Vanguard Way Wey South Path
National Cycle Routes	NCR21 NCR22

v t e Hydrology of Surrey
Main rivers	River Blackwater River Colne Cranleigh Waters River Mole River Ock River Thames River Tillingbourne River Wey
Canals and navigations	Basingstoke Canal Wey and Arun Canal Wey and Godalming Navigations
Ordinary watercourses	Abbey River River Ash River Bourne, Addlestone River Bourne, Chertsey Cobblers Brook River Eden River Ember Hogsmill River Law Brook Pipp Brook The Rye The Rythe Windle Brook Wish Stream Wraysbury River
Lakes, ponds and wetlands	Busbridge Lakes Claremont Landscape Garden Enton Lakes Frensham Ponds Gatton Park Goldsworth Park Hedgecourt Henfold Lakes Kempton Park Racecourse Lakeside Leisure Complex McLaren Technology Centre Mercers Country Park Painshill Sherbourne Pond Silent Pool Papercourt Marshes Silvermere Sutton Place Thorpe Park No 1 Gravel Pit Virginia Water Lake Winkworth Arboretum
Reservoirs	Bessborough Reservoir Island Barn Reservoir Kempton Park Reservoirs King George VI Reservoir Knight Reservoir Molesey Reservoirs Queen Elizabeth II Reservoir Queen Mary Reservoir Stain Hill Reservoirs Staines Reservoirs Wraysbury Reservoir
Categories: Rivers, Canals

51°11′18″N 0°37′02″W / 51.18839°N 0.61735°W / 51.18839; -0.61735