Scar House Reservoir. The first NAG sampling point to the source of the Nidd. Volunteer Andrew Murday from Team 1 shows the three water samples taken -the large one for E.Coli testing and the two smaller bottles for testing nutrient chemistry

Summerstone. 3 kilometres downstream from Scar House. Lovely clear water in a narrow rocky stream

Thrope Lane Side. In a beautiful wooded section off the road between Scar House and Lofthouse Steep valley on the other side of the Nidd

Lofthouse footbridge. Lofthouse footbridge, a short distance to the north west of Lofthouse village

How Stean Gorge. How Stean Gorge. Volunteers Shirley and Rachel on the roadbridge, just downstream of the main beauty spot and café. The beck joins the Nidd just south of Lofthouse

Low Sikes. Halfway between Lofthouse and Ramsgill, this bridge, links the main road to West House Farm. Clear water. Karen from Team 2 is sampling from the bridge

Ramsgill Lui beck, Ramsgill Lui beck. Volunteers Rachel and Karen sample from this small beck (one of three sampling points in this tiny village). Foam observed in a quiet section.

Ramsgill Nidd Bridge. Ramsgill Nidd Bridge. Karen sampling from downstream side of this stone bridge over the Nidd, into deep slow flowing water.

Ramsgill Beck. A second beck in Ramsgill, from a stone bridge on the main road in the centre of Ramsgill. Flecks of foam observed on the water’s surface. Photos by volunteer Lachlan

Wath Bridge. Wath Bridge. A popular tourist spot – a steep very narrow stone humpbacked bridge on the road leading to the Sportsmans Hotel. Team 3’s first sampling spot. Peaty-coloured, fairly still water just above where Dauber Gill joins the Nidd

Pateley Main Bridge. Pateley Main Bridge. Sampling spot just upstream of the main road bridge (in photo). Fairly still water. Some patches of foam observed, trapped under branches

Glasshouses Bridge. Volunteer Steve takes samples from the fairly shallow water under the bridge, just off the main road between Pateley Bridge and Summerbridge

Summerbridge. The river downstream of the bridge, on the road between Summerbridge and Dacre Banks. A wide fast running stretch of the river.

Duffers Pool at Darley. Below Summerbridge and downstream from Dacre Banks CSO and immediately below Darley beckTeam 4’s Adrian samples by wading into the river from this stony ‘beach’

Darby’s Pool, below station road, Darley (Darby was a famous former secretary of Harrogate Flyfishers’ Club). Volunteers Adrian and Peter sample from the bank of the Nidd

Darley Second Sleeper Pool – below Darley Sewage Works. STW reported to be discharging from treated sewage and storm overflow outlet pipes. Adrian samples from a wild, difficult to access sampling location.

Birstwith Bridge. Adrian and Peter sample downstream from the road bridge

Cragg Hall Farm -Upstream. Team 5’s volunteers Chris, Maggie and John prepare to sample above the Sewage Farm between Hampsthwaite and Killinghall. River running high. A fallen willow tree regarded as a possible flood risk (but excellent for trout protection (Ed))

Cragg Hall Farm -Downstream. Maggie and Chris show the samples obtained below the sewage farm

Ripley Beck. The muddy beck runs into the clearer water on the Nidd, to left of photo - just upstream of Killinghall Bridge.

Killinghall Bridge. Sampling from the old bridge, downstream as pictured.

Oak Beck Spruisty bridge. Team 6’s volunteers from Bilton Conservation Trust carried out all the Oak Beck sampling. Keith photographs Shirley, Steve and John at this iconic location

Oak Beck below the Hydro. Chris and John take a sample from a very muddy looking oak beck at a location well known for pollution events

Cow Dyke / Oak Dyke confluence. A milky light brown Cow Dyke, with foam floating on the surface. Chris doing the honours.

Bilton Beck / Woodfield road. Jed, Simon and David preparing to sample. A steady flow reported on a beck, high river level from rain the previous day.

Nidd viaduct below Oak beck. Helen, Jeff, Jed and Simon in a difficult to access location.

Conyngham Hall upstream. A popular spot where kayaking and paddleboarding takes place (and the Knaresborough Great Bed Race crosses the river Nidd). The University of Leeds Teams 7 and 8, led by Maddy, include volunteers Joe and Jesse

Conyngham Hall above CSO

Conyngham Hall above CSO

Waterside car park. Below the bridge, above the island. above a visible pipe.

Waterside car park mill stream tributary. Left of the island, below the visible pipe.

Waterside car park above CSO, at the centre of the ‘beach area’

Along Abbey road, above CSO. From the bridge (Mother Shipton side)

along Abbey road, below CSO. Sampled from the bank at the end of the metal fence by house, under a willow tree.

Top of Lido bathing water site.

Behind Toyota garage and caravans. Below STW

Crimple Beck, Burnbridge. NAG team 9 - David Amanda, Andy and Helen. David being interviewed by Jim from Radio York. A field drain noted.

Hookstone Beck. Andy sampling from the stone footbridge. Water discoloured

Crimple beck near crimple lane. (Travellers’ Rest). Team 9 on the bank. Fast flowing beck, discoloured. Some foam observed

Rudbeck near Stonefall cemetery. Downstream grill has debris. Smell of sewage reported to EA

Crimple Beck Spofforth. Sample from footbridge in open fields setting (drainage pipe on upside of bridge, RHS bank)

Little Ribston. Team 10 Martin and James sampling in a fast-flowing muddy river (photo by Judi)

Hunsingore. Martin does a spectacular long-distance sample from the bank of the river Nidd above a footbridge. The river had been over the bank recently, after heavy rain. Chocolate coloured river with a line of foam in the centre of the river.

New Skip Bridge. Samples taken from bridge as the river had been in flood the previous day

Moor Monkton. River high, in flood. Samples from the bank