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
14182500 14187500 14162500 14185000 14163000 14202650 11509500 14149011 14158850 14211010 14317450 14202980 14162440 442453122394900 14209710 14152000 14186200 14159500 11510700 14211720 14206950 14163900 14207200 14162200 14158100 452731123092100 14210000 14206241 14185900 14316460 14183020 14186700 14181500 14203500 453040123065201 14078260 14164550 453030122560101 14151000 14187200 14150000 420741121554001 11509370 14309000 142063398 420448121503100 421015121471800 420037121334100 420853121505501 420853121505500 11507501 422305121553800 422622122004000 452041119321500 422622122004003 421935121551200 14206694 444306122144600 422719121571400 14162450 420833121402000 453004122510301 422305121553803 422042121513100 421401121480900 420451121510000 453027122400000 422444121580400 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.