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 Dissolved Oxygen, in mg/L

Map of , showing which states provide real-time computed water-quality data
01673000 01645762 02054550 02041650 0164579522 01654000 0163287828 01654670 01638500 01654500 01646500 01645704 01646000 01674500 02035000 01646305 01654107 01632900 01656903 01646305 0164578734 01668000 0205551614 02079500 02054750 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.