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
04136000 04137025 04137500 04121650 04124200 04125460 04121660 04121970 04137030 04121680 04125550 04124000 04137005 040325155 04166500 04167625 04043016 04136900 04121944 04161820 04136500 04162010 04166100 04057801 04057800 04137020 04165500 04168400 04157005 04118564 04032150 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.