WaterQualityWatch -- Continuous Real-Time Water Quality of Surface Water in the United States

Real-Time pH, field, in standard units

Map of , showing which states provide real-time computed water-quality data
11455140 10260500 09429490 11510700 11455136 11455276 11461500 11337190 11313405 11044000 11455095 11455508 11455142 381142122015801 11463980 11336790 11463682 11176900 10261500 11447890 11312676 11455338 11447650 11204100 11203580 11273400 11465240 11467000 11462500 11455385 11455315 11452800 11451800 10260950 11452500 11511990 11455485 380631122032201 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.