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
01478000 01651003 01651800 01649500 01650800 01646305 01646000 01585075 01650800 01594441 01640152 01483155 01646500 01638500 01479000 01579550 01478245 01595800 01653522 01643580 01611500 01491000 03066000 01653560 01589290 01653620 01478650 01581752 01649190 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.