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
01576381 03099500 04212895 01438500 01458500 01573816 01575900 01427510 01576003 01573208 03036000 01470736 01481500 01573684 01427207 01477050 015319015 01463500 01548030 01544500 01473500 03081000 03012545 01467087 04213152 01467042 01467200 03072655 03034000 03007800 03085000 01454700 03106000 03073000 01474000 01467086 01467048 01474500 01540500 01475530 03083500 01473900 01465798 01549700 03077100 014670261 01481000 03108500 03049640 03085002 01542500 03012550 03105500 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.