upstream of vs upstream to

Both 'upstream of' and 'upstream to' are correct phrases, but 'upstream of' is more commonly used in English. They are used to indicate a location or direction in relation to a point further up a river or stream.

Last updated: March 30, 2024

upstream of

This phrase is correct and commonly used in English.

This phrase is used to indicate a location or direction in relation to a point further up a river or stream. It is commonly used in various contexts, such as navigation, geography, and environmental science.

Examples:

The town is located upstream of the bridge.
The pollution is coming from upstream of the factory.
The source of the river is upstream of the village.
The hiking trail follows the river upstream of the waterfall.
The fish are swimming upstream of the dam.

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The recommended particle pre-classifier shall be located upstream of the VPR.
This is usually achieved by using a resonator and a straight approach tube upstream of the sampling point.
A thermal chiller upstream of a THC measurement system for compression-ignition engines may not be used.
Engines may discharge crankcase emissions into the exhaust upstream of any after treatment device during all operation.
flexible fuel line (if upstream of first automatic shut-off valve or other safety devices);
Diluted exhaust flow rate from a CVS without a heat exchanger upstream of the flow measurement
An inertial pre-classifier with a 50 % cut point between 2,5 μm and 10 μm may be installed immediately upstream of the filter holder.
Alternatively separate pre-classifiers may be used, extracting the particle number sample from the dilution system upstream of the particulate mass pre-classifier.
Engines may discharge crankcase emissions into the exhaust upstream of any after treatment device during all operation.
Sample pumps upstream of an analyser or storage medium for any gas shall be used.
The C2H6 analytical gas mixture shall be introduced upstream of the non-methane cutter;
Exhaust cooling upstream of the flow-meter is permitted with the following restrictions:
The temperature of intake air shall be maintained to (25 ± 5) ºC, as measured upstream of any engine component.
inclusion upstream of digital technologies for production, post-production, distribution, marketing and archiving of European audiovisual programmes.
Closely linked to the waste management process, although upstream of the process, are the EU Directives dealing with Environmental Impact Assessment and the access of citizens to information concerning the environment.
The indirect impacts of upstream activities refer to the use of materials, energy and emissions associated with goods/services sourced from upstream of the Organisational boundary in support of producing the Product Portfolio.
This shall be achieved either by feeding the particle number sample flow back into the dilution system upstream of the flow measuring device or by mathematical correction as outlined in paragraph 10.3.2.
If the manufacturer does not specify a location, this pressure shall be measured upstream of any turbocharger or exhaust gas recirculation system connection to the intake air system.
Unfortunately, the central section of the Danube downstream of Vienna and the tributaries of the Elbe upstream of Magdeburg have been left in the shadows by these efforts.
Lühe: from the mill 250 m upstream of the Marschdamm-Horneburg road bridge to the Lühe barrage.

Alternatives:

upstream from
upstream at
upstream in the direction of
upstream on
upstream toward

upstream to

This phrase is correct but less commonly used in English.

This phrase is also used to indicate a location or direction in relation to a point further up a river or stream. While less common, it can still be used in the same contexts as 'upstream of.'