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 pH, field, in standard units

Map of , showing which states provide real-time computed water-quality data
01575900 01576381 01576003 394337079544201 03081000 01427510 01548030 03108500 03036000 01458500 01438500 01573816 01573208 04212895 01427207 03083500 03043810 01518700 01477050 01573684 03072655 01463500 01481500 01470736 015319015 03049640 01467200 03072000 01516350 01467087 01474500 03034000 01467086 01467048 01475530 04213152 03105500 01542500 01481000 01544500 01465798 03073000 01467042 01474000 03106000 03007800 03079000 01473500 01454700 01540500 01549700 014670261 01473900 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.