USGS - science for a changing world

WaterQualityWatch -- Continuous Real-Time Water Quality of Surface Water in the United States

Real-Time Chlorophyll, in µg/l

Map of , showing which states provide real-time computed water-quality data
11455478 11455136 381142122015801 380631122032201 11447890 11455385 11455508 11455142 11455095 11337190 11455335 11304200 11455140 11455276 11447650 381424121405601 11455268 11455146 380833122033401 11455315 11273400 373751122143601 11455280 Explanation

* Site operated on a seasonal basis or currently is not operating.
No values are available for the last 6 hours.

The "Real-time" map tracks short-term changes (over several hours) of water quality. Although the general appearance of the map changes very little from one hour to the next, individual sites may change rapidly in response to major rain events or to reservoir releases. The data used to produce this map are provisional.

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Page Last Modified: Mon 9 June 2014