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
03292550 05515500 03293530 03302030 03275500 03292500 03293500 03374100 03353415 03292474 05517500 03292480 05518000 03302050 03353420 03353200 03293510 03293000 03294570 05536356 03277200 05524500 03292475 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.