Designated bathing water · official register
Nidd at the Lido, Knaresborough
North Yorkshire
The Environment Agency data currently advises against bathing here. Based on the EA classification Poor (2025) and no active short-term pollution warning.
Latest EA sample· 24 Sept 2026
3,900
E. coli · cfu/100ml
600
Intestinal enterococci · cfu/100ml
This season's samples
In-season Environment Agency lab results, newest first. Water quality is more likely to be poor after heavy rain.
| Sampled | E. coli | Int. enterococci |
|---|---|---|
| 24 Sept 2026 | 3,900 | 600 |
| 14 Sept 2026 | 670 | 170 |
| 11 Sept 2026 | 610 | 210 |
| 24 Jun 2026 | 430 | 82 |
cfu/100ml. ≥/≤ mark over- and under-range lab readings.
Storm overflows within 5.0 km
Monitored sewage discharge points near this bathing water, from the National Storm Overflow Hub. An active spill upstream can affect water quality before it shows up in lab samples.
24
Storm overflows
0
Spilling now
0
Monitors offline
0
Spills · 24 h
- Yorkshire Water · YWS00278 · River Niddinactive50 m
- Yorkshire Water · YWS00693 · River Niddinactive739 m
- Yorkshire Water · YWS01038 · River Niddinactive780 m
- Yorkshire Water · YWS00277 · River Niddinactive978 m
- Yorkshire Water · YWS00279 · River Niddinactive987 m
- Yorkshire Water · YWS00231 · River Nidd (In Middle)inactive1.0 km
- Yorkshire Water · YWS00273 · Mill Stream (Trib Of River Nidd)inactive1.6 km
- Yorkshire Water · YWS00274 · Mill Stream (Trib Of River Nidd)inactive1.6 km
- Yorkshire Water · YWS00276 · Frogmire Dyke (Culverted)(Via Sw. Sewer)inactive1.9 km
- Yorkshire Water · YWS00275 · River Niddinactive1.9 km
About this verdict
The classification, lab samples and pollution warnings above are the Environment Agency's own published data for this designated site; River Truth adds live storm-overflow context from the National Storm Overflow Hub. Sample results reflect water quality at the time of testing and this page is not formal bathing advice — heed any on-site signage.