These obelisks are a continuously varying public display of the environmental standards that are being achieved by the city of Stockholm. They display air quality measures (pm10 particles). They display wastewater contaminant levels pre and post treatment. They also display things like wind-speed and are a constant reminder of what human activities do to their environment, and what the city is doing to protect natural resources.
It's a great example of what Auckland could do as it works to achieve its goal of being most liveable city especially in terms of environmental standards.
This piece of public art in Strandvägen is fed by air and water pollution data. It looks like the work has been around for a while – and it gives a simple visualisation of pollution levels with a light sequence. Nothing too remarkable there except that it claims a real time data feed. Making things public. Atmospheres of democracy.
This plaque describes the nitrogen and phosphorus issues with wastewater, and discharges after treatment. Presumably Stockholm's treated wastewater is discharged into the harbour somewhere...
This interprets the obelisk displays for wastewater contaminants. Phosphorus levels are shown by the green lights. Nitrogen by red lights. The displays sequentially show levels BEFORE treatment, and then AFTER treatment. The scales show that the units are milligrams/litre of wastewater.
Here it is pre-treatment.....
...and post-treatment...
Another chart records the actual flow-rate of wastewater.
And here's King Gustav's message.
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