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
03293000 03292474 03293532 03298200 03298000 03293500 03293510 03292480 03290500 03293530 03298250 03301940 0329247450 03292500 03297900 03293510 03302030 03612600 0329247350 03298300 03302000 03292900 03292550 03288180 03294570 03302050 03321500 03302058 03297800 03301900 03400800 03298150 03254520 03277200 03417500 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.