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

USGS is updating how statistical information is delivered. WaterWatch and WaterQualityWatch will be retired around February 24, 2026. Explore alternative tools and share feedback at wdfn@usgs.gov.

Real-Time Specific Conductance, in µS/cm

Map of , showing which states provide real-time computed water-quality data
01412150 01413038 01412130 01480120 01389005 01302020 01467087 01460595 01445500 01467194 01474500 01388000 01408029 01481500 01465880 01467081 01400500 01467150 01477120 01466500 01477070 01466900 01463500 01464290 01467005 01464500 01438500 01467024 01467000 01458500 01467086 01467048 403859074555201 01465798 01467042 01454700 01402000 01474000 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.