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
0219897993 021721675 021765795 02198980 021720712 0217206962 02171920 021720709 021720698 021720869 021720677 02198920 0217206935 021989773 02171905 02136371 02172053 02110777 0217689150 021720825 021720508 02110400 021989784 02110701 02110755 02110760 021989791 02171560 02110770 02198840 02156500 02135000 02110815 02172020 02160991 02171645 021108125 02110550 02171000 02171500 02110500 02110725 02172040 02172050 02110704 02160700 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.