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
09085160 09152500 09095500 09163500 09070500 07099400 06711565 09136100 09071750 09144250 09085000 07109500 393259107194801 09149500 391953108130201 07106000 09041400 06707525 394746108262901 09027100 09020500 06729470 09060799 09010500 09058000 09114500 400712108214601 09034250 09037500 394548108280501 09040500 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.