The Environment Agency data portal allows access to water quality date from around the UK:

[[https://environment.data.gov.uk/water-quality/view/landing|EA Water Quality Archive]]

A number of areas are sampled roughly monthly on the River Tees, you can find them all on the data portal.

[[https://environment.data.gov.uk/water-quality/view/explore?search=&area=&samplingPointType.group=&samplingPointStatus%5B%5D=open&loc=454214%2C523666&_limit=500|Sampling points around the downstream Tees]]

Below are a number of key ones:
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45401356?_all=true|Dabholme Gut Confluence]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45400826?_all=true|Tees At Redcar Jetty (Surface)]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45400817?_all=true|Tees At The Gares (Surface)]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45400834?_all=true|Tees At Smiths Dock (Surface)]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45401018?_all=true|Tees At Teesport (Bottom)]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45401019?_all=true|Tees At Teesport (Surface)]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45050063?_all=true|Tees Coastal Inshore Of Teeside Windfarm]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45400840?_all=true|Tees At Transporter Bridge (Surface)]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45401348?_all=true|Seaton Channel East Of Dock 7]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45500143?_all=true|Tees Bay Off Hartlepool Ps Main Cw Outfl]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45401146?_all=true|Tees Between Seaton Channel & Bran Sands]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45400845?_all=true|Tees At Haverton Hill Shipyard (Surface)]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/NE-45401021?_all=true|Tees At Billingham Reach (Surface)]]

{html}

{{url>https://umap.openstreetmap.fr/en/map/river-tees-water-quality_910752?scaleControl=false&miniMap=false&scrollWheelZoom=false&zoomControl=true&allowEdit=false&moreControl=true&searchControl=null&tilelayersControl=null&embedControl=null&datalayersControl=true&onLoadPanel=undefined&captionBar=false}}
></iframe><p><a href="//umap.openstreetmap.fr/en/map/river-tees-water-quality_910752">See full screen</a></p>

{/html}

How does this compare to other places in the country?
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/SO-G0003493?_all=true|LANGSTONE HARBOUR MOUTH SAMPLING POINT]]

Make Tees data look very gappy?  Why?

However,
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/TH-PTTR0024?_all=true|THAMES AT CHAPMAN BUOY (62.5KMS BELOW LONDON BRIDGE)]]

seems to have the same gaps as Tees.  Why?

But other data doesn't have the same gaps:
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/TH-PTTR0023?_all=true|THAMES AT MUCKING (53.2KMS BELOW LONDON BRIDGE)]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/TH-PTTR0022?_all=true|THAMES AT OVENS BUOY (47.7KMS BELOW LONDON BRIDGE)]]
	*[[https://environment.data.gov.uk/water-quality/view/sampling-point/TH-PTTR0019?_all=true|THAMES AT ERITH (26.6KMS BELOW LONDON BRIDGE)]]