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
294643095035200 08052700 08180800 08057410 08062500 07332605 08371500 08377200 08374200 08069500 07332622 08211200 08047050 08066850 08065350 08067000 08188500 08188060 08449000 295554095093402 08181800 08052745 08374510 295826095082200 08057000 08070200 08181500 08048000 08068000 08105891 08375300 08155500 300032095080501 08211506 08041770 08068500 08049500 08079200 08077910 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.